The E30 is the 3 Series that turned BMW into a household name. Built from 1982 to 1994 as a saloon, Touring, coupé and convertible, it was offered with four-cylinder M10, M40 and M42 engines, the M20 six, the M21 turbodiesel and, in the M3, the S14.
Today most E30 engine buyers are restoring a car, replacing a tired original unit or building a swap. This guide covers every engine the E30 left the factory with, what fits with minimal work, and the popular swaps such as the M50, M52, S50, S52 and S54.
In total, 14 model and engine combinations are listed for the BMW E30 3 Series in our data, using 6 engine families: M10, M20, M21 and M41, S14, M40 and M42 and M44. Production covered 1982–1994. We currently hold 0 engines that suit these cars.
Every BMW E30 3 Series engine at a glance
| Model | Engine code | Fuel | Power | Torque | Years |
|---|---|---|---|---|---|
| E30 316 | M10B16 | Petrol | 90 hp | 130 Nm | 1962–1988 |
| E30 318 | M10B18 | Petrol | 105 hp | 145 Nm | 1962–1988 |
| E30 320i | M20B20 | Petrol | 129 hp | 164 Nm | 1977–1992 |
| E30 323i | M20B23 | Petrol | 139 hp | 205 Nm | 1977–1987 |
| E30 325e | M20B27 | Petrol | 125 hp | 240 Nm | 1982–1988 |
| E30 324td | M21D24 | Diesel | 115 hp | 220 Nm | 1983–1991 |
| E30 325i | M20B25 | Petrol | 170 hp | 226 Nm | 1985–1993 |
| E30 320is | S14B20 | Petrol | 192 hp | 210 Nm | 1986–1991 |
| E30 320iS | S14B20 | Petrol | 192 hp | 210 Nm | 1986–1991 |
| E30 M3 | S14B23 | Petrol | 200 hp | 240 Nm | 1986–1991 |
| E30 M3 Evolution | S14B23 | Petrol | 200 hp | 240 Nm | 1986–1991 |
| E30 316i | M40B16 | Petrol | 102 hp | 141 Nm | 1987–1994 |
| E30 318i | M40B18 | Petrol | 113 hp | 162 Nm | 1987–1994 |
| E30 318is | M42B18 | Petrol | 140 hp | 175 Nm | 1989–1996 |
BMW E30 3 Series: petrol engines
M10 in the BMW E30 3 Series
E30 316: M10B16, 1.6 L, 90 hp and 130 Nm (1962–1988).
E30 318: M10B18, 1.8 L, 105 hp and 145 Nm (1962–1988).
BMW designed the M10 under Alex von Falkenhausen with a canted block, a chain-driven camshaft and a crossflow aluminium head.
On the M10, our workshop watches for camshaft and rocker wear, timing chain guides and tensioner and warped head after overheating. Valve clearance is adjusted cold with eccentric adjusters on the rocker arms. Fit a new spray bar if the old one is blocked or loose.
M20 in the BMW E30 3 Series
The E30 320i uses the M20B20, a 2.0 L inline-6 rated at 129 hp and 164 Nm, built 1977–1992.
For the E30 323i, BMW fitted the M20B23 — 2.3 L, naturally aspirated, 139 hp.
The E30 325e uses the M20B27, a 2.7 L inline-6 rated at 125 hp and 240 Nm, built 1982–1988.
E30 325i: M20B25, 2.5 L, 170 hp and 226 Nm (1985–1993).
The M20 arrived in the E12 520/6 and E21 320/6 as a 2.0 litre with a single belt-driven camshaft.
On the M20, our workshop watches for timing belt failure, cylinder head cracks and rocker arm and shaft wear. Valve clearance is set cold at about 0.25 mm with eccentric adjusters. Use a new head bolt set whenever the head comes off.
M40 in the BMW E30 3 Series
E30 316i: M40B16, 1.6 L, 102 hp and 141 Nm (1987–1994).
The E30 318i uses the M40B18, a 1.8 L inline-4 rated at 113 hp and 162 Nm, built 1987–1994.
BMW built the M40 from 1987 to 1994 in 1.6 and 1.8 litre form with a single belt-driven camshaft and eight valves.
On the M40, our workshop watches for timing belt, camshaft lobe wear and rocker arms. Because cam wear is common, a new camshaft and rockers are a sensible addition when a used M40 is fitted.
M42 and M44 in the BMW E30 3 Series
The E30 318is uses the M42B18, a 1.8 L inline-4 rated at 140 hp and 175 Nm, built 1989–1996.
The M42 arrived in 1989 at 1.8 litres with two chain-driven camshafts, four valves per cylinder and hydraulic lifters.
On the M42 and M44, our workshop watches for head gasket, timing chain guides and tensioner and valve cover and oil leaks. Hydraulic lifters mean no valve adjustment, but they need clean oil of the right viscosity to stay quiet.
Read our full M42 and M44 guide
BMW E30 3 Series: diesel engines
M21 and M41 in the BMW E30 3 Series
For the E30 324td, BMW fitted the M21D24 — 2.4 L, turbocharged, 115 hp.
BMW built the M21 from the M20 petrol six with a diesel head, a timing belt and a turbocharger.
On the M21 and M41, our workshop watches for injection pump, head cracks and timing belt (m21). Change the M21 timing belt when fitting a used engine.
Read our full M21 and M41 guide
BMW E30 3 Series: m and performance engines
S14 in the BMW E30 3 Series
E30 320is: S14B20, 2.0 L, 192 hp and 210 Nm (1986–1991).
For the E30 320iS, BMW fitted the S14B20 — 2.0 L, naturally aspirated, 192 hp.
E30 M3: S14B23, 2.3 L, 200 hp and 240 Nm (1986–1991).
The E30 M3 Evolution uses the S14B23, a 2.3 L inline-4 rated at 200 hp and 240 Nm, built 1986–1991.
BMW Motorsport built the S14 from 1986 to 1991, combining an M10-derived block with a four-valve head derived from the M88.
On the S14, our workshop watches for valve clearances, timing chain and guides and throttle body linkage. Keep the engine number and documentation together; matching numbers add value on an E30 M3.
Will it fit? BMW E30 3 Series engine questions
Will the M10B16 fit my BMW E30 316?
For the BMW E30 316, the M10B16 is the factory engine and the one to order. The second 3 Series was built 1982–1994, and the M10B16 was produced 1962–1988, so check that your car's build date falls inside that window. Confirm the drive type (rear-drive or xDrive), the gearbox (manual or automatic) and the emissions standard, because these can change the sump, the flywheel and the software. Send us the VIN and we check all of it for you.
How much is a replacement engine for a BMW E30 316?
We do not have an M10B16 on the shelf for the E30 316 at the moment. Units arrive regularly; send us your VIN and we will tell you when the next one is ready and what it will cost, including delivery.
Will the M10B18 fit my BMW E30 318?
The M10B18 is the original engine for the BMW E30 318, which makes it the straightforward choice. The second 3 Series was built 1982–1994, and the M10B18 was produced 1962–1988, so check that your car's build date falls inside that window. Confirm the drive type (rear-drive or xDrive), the gearbox (manual or automatic) and the emissions standard, because these can change the sump, the flywheel and the software. Send us the VIN and we check all of it for you.
How much is a replacement engine for a BMW E30 318?
We do not have an M10B18 on the shelf for the E30 318 at the moment. Units arrive regularly; send us your VIN and we will tell you when the next one is ready and what it will cost, including delivery.
Will the M20B23 fit my BMW E30 323i?
Yes, the BMW E30 323i left the factory with the M20B23, so an M20B23 from another car is the direct replacement. The second 3 Series was built 1982–1994, and the M20B23 was produced 1977–1987, so check that your car's build date falls inside that window. Confirm the drive type (rear-drive or xDrive), the gearbox (manual or automatic) and the emissions standard, because these can change the sump, the flywheel and the software. Send us the VIN and we check all of it for you.
How much is a replacement engine for a BMW E30 323i?
We do not have an M20B23 on the shelf for the E30 323i at the moment. Units arrive regularly; send us your VIN and we will tell you when the next one is ready and what it will cost, including delivery.
Will the M20B27 fit my BMW E30 325e?
The M20B27 is the original engine for the BMW E30 325e, which makes it the straightforward choice. The second 3 Series was built 1982–1994, and the M20B27 was produced 1982–1988, so check that your car's build date falls inside that window. Confirm the drive type (rear-drive or xDrive), the gearbox (manual or automatic) and the emissions standard, because these can change the sump, the flywheel and the software. Send us the VIN and we check all of it for you.
How much is a replacement engine for a BMW E30 325e?
We do not have an M20B27 on the shelf for the E30 325e at the moment. Units arrive regularly; send us your VIN and we will tell you when the next one is ready and what it will cost, including delivery.
Will the M21D24 fit my BMW E30 324td?
For the BMW E30 324td, the M21D24 is the factory engine and the one to order. The second 3 Series was built 1982–1994, and the M21D24 was produced 1983–1991, so check that your car's build date falls inside that window. Confirm the drive type (rear-drive or xDrive), the gearbox (manual or automatic) and the emissions standard, because these can change the sump, the flywheel and the software. Send us the VIN and we check all of it for you.
How much is a replacement engine for a BMW E30 324td?
We do not have an M21D24 on the shelf for the E30 324td at the moment. Units arrive regularly; send us your VIN and we will tell you when the next one is ready and what it will cost, including delivery.
Will the S14B20 fit my BMW E30 320is?
The S14B20 is the original engine for the BMW E30 320is, which makes it the straightforward choice. The second 3 Series was built 1982–1994, and the S14B20 was produced 1986–1991, so check that your car's build date falls inside that window. Confirm the drive type (rear-drive or xDrive), the gearbox (manual or automatic) and the emissions standard, because these can change the sump, the flywheel and the software. Send us the VIN and we check all of it for you.
How much is a replacement engine for a BMW E30 320is?
We do not have an S14B20 on the shelf for the E30 320is at the moment. Units arrive regularly; send us your VIN and we will tell you when the next one is ready and what it will cost, including delivery.
Will the S14B20 fit my BMW E30 320iS?
Yes, the BMW E30 320iS left the factory with the S14B20, so an S14B20 from another car is the direct replacement. The second 3 Series was built 1982–1994, and the S14B20 was produced 1986–1991, so check that your car's build date falls inside that window. Confirm the drive type (rear-drive or xDrive), the gearbox (manual or automatic) and the emissions standard, because these can change the sump, the flywheel and the software. Send us the VIN and we check all of it for you.
How much is a replacement engine for a BMW E30 320iS?
We do not have an S14B20 on the shelf for the E30 320iS at the moment. Units arrive regularly; send us your VIN and we will tell you when the next one is ready and what it will cost, including delivery.
Will the M40B16 fit my BMW E30 316i?
The M40B16 is the original engine for the BMW E30 316i, which makes it the straightforward choice. The second 3 Series was built 1982–1994, and the M40B16 was produced 1987–1994, so check that your car's build date falls inside that window. Confirm the drive type (rear-drive or xDrive), the gearbox (manual or automatic) and the emissions standard, because these can change the sump, the flywheel and the software. Send us the VIN and we check all of it for you.
How much is a replacement engine for a BMW E30 316i?
We do not have an M40B16 on the shelf for the E30 316i at the moment. Units arrive regularly; send us your VIN and we will tell you when the next one is ready and what it will cost, including delivery.
Engine swap questions for the BMW E30 3 Series
Owners often ask whether a more powerful engine from another BMW E30 3 Series model can be fitted. These answers show what each upgrade involves.
Can I fit the S14B20 from the E30 320iS into an E30 316?
It is possible, and it is one of the more common upgrades. Both engines are petrol inline-4 units, so the engine bay and mounting points are similar, but the S14B20 needs its own wiring harness and ECU, the matching gearbox or clutch, and often a different sump, cooling and exhaust. The gain is 102 hp and 80 Nm. In Germany and most of Europe a swap must be inspected and registered; check with your testing station first.
Can I fit the S14B23 from the E30 M3 Evolution into an E30 316?
It is possible, and it is one of the more common upgrades. Both engines are petrol inline-4 units, so the engine bay and mounting points are similar, but the S14B23 needs its own wiring harness and ECU, the matching gearbox or clutch, and often a different sump, cooling and exhaust. The gain is 110 hp and 110 Nm. In Germany and most of Europe a swap must be inspected and registered; check with your testing station first.
Can I fit the S14B20 from the E30 320iS into an E30 318?
It is possible, and it is one of the more common upgrades. Both engines are petrol inline-4 units, so the engine bay and mounting points are similar, but the S14B20 needs its own wiring harness and ECU, the matching gearbox or clutch, and often a different sump, cooling and exhaust. The gain is 87 hp and 65 Nm. In Germany and most of Europe a swap must be inspected and registered; check with your testing station first.
Can I fit the M20B27 from the E30 325e into an E30 318?
It is a conversion rather than a replacement. The M20B27 is an inline-6 and the M10B18 an inline-4, so mounts, sump, cooling, exhaust, wiring and ECU all change. The gain is 20 hp and 95 Nm. In Germany and most of Europe a swap must be inspected and registered; check with your testing station first.
Can I fit the S14B20 from the E30 320is into an E30 320i?
It is a conversion rather than a replacement. The S14B20 is an inline-4 and the M20B20 an inline-6, so mounts, sump, cooling, exhaust, wiring and ECU all change. The gain is 63 hp and 46 Nm. In Germany and most of Europe a swap must be inspected and registered; check with your testing station first.
Can I fit the S14B23 from the E30 M3 into an E30 320i?
It is a conversion rather than a replacement. The S14B23 is an inline-4 and the M20B20 an inline-6, so mounts, sump, cooling, exhaust, wiring and ECU all change. The gain is 71 hp and 76 Nm. In Germany and most of Europe a swap must be inspected and registered; check with your testing station first.
Can I fit the S14B20 from the E30 320is into an E30 323i?
It is a conversion rather than a replacement. The S14B20 is an inline-4 and the M20B23 an inline-6, so mounts, sump, cooling, exhaust, wiring and ECU all change. The gain is 53 hp and 5 Nm. In Germany and most of Europe a swap must be inspected and registered; check with your testing station first.
Can I fit the M42B18 from the E30 318is into an E30 323i?
It is a conversion rather than a replacement. The M42B18 is an inline-4 and the M20B23 an inline-6, so mounts, sump, cooling, exhaust, wiring and ECU all change. The gain is 1 hp and 0 Nm. In Germany and most of Europe a swap must be inspected and registered; check with your testing station first.
Can I fit the S14B23 from the E30 M3 into an E30 325e?
It is a conversion rather than a replacement. The S14B23 is an inline-4 and the M20B27 an inline-6, so mounts, sump, cooling, exhaust, wiring and ECU all change. The gain is 75 hp and 0 Nm. In Germany and most of Europe a swap must be inspected and registered; check with your testing station first.
Can I fit the S14B23 from the E30 M3 Evolution into an E30 325e?
It is a conversion rather than a replacement. The S14B23 is an inline-4 and the M20B27 an inline-6, so mounts, sump, cooling, exhaust, wiring and ECU all change. The gain is 75 hp and 0 Nm. In Germany and most of Europe a swap must be inspected and registered; check with your testing station first.
Can I fit the S14B20 from the E30 320is into an E30 324td?
It is a full conversion: the S14B20 runs on petrol and the M21D24 on diesel, so the fuel system, wiring, ECU, instrument coding and usually the gearbox change too. The gain is 77 hp and 0 Nm. In Germany and most of Europe a swap must be inspected and registered; check with your testing station first.
Can I fit the M20B27 from the E30 325e into an E30 324td?
It is a full conversion: the M20B27 runs on petrol and the M21D24 on diesel, so the fuel system, wiring, ECU, instrument coding and usually the gearbox change too. The gain is 10 hp and 20 Nm. In Germany and most of Europe a swap must be inspected and registered; check with your testing station first.
Can I fit the S14B23 from the E30 M3 into an E30 325i?
It is a conversion rather than a replacement. The S14B23 is an inline-4 and the M20B25 an inline-6, so mounts, sump, cooling, exhaust, wiring and ECU all change. The gain is 30 hp and 14 Nm. In Germany and most of Europe a swap must be inspected and registered; check with your testing station first.
Can I fit the S14B20 from the E30 320is into an E30 325i?
It is a conversion rather than a replacement. The S14B20 is an inline-4 and the M20B25 an inline-6, so mounts, sump, cooling, exhaust, wiring and ECU all change. The gain is 22 hp and 0 Nm. In Germany and most of Europe a swap must be inspected and registered; check with your testing station first.
Can I fit the M42B18 from the E30 318is into an E30 316i?
It is possible, and it is one of the more common upgrades. Both engines are petrol inline-4 units, so the engine bay and mounting points are similar, but the M42B18 needs its own wiring harness and ECU, the matching gearbox or clutch, and often a different sump, cooling and exhaust. The gain is 38 hp and 34 Nm. In Germany and most of Europe a swap must be inspected and registered; check with your testing station first.
Can I fit the M10B18 from the E30 318 into an E30 316i?
It is possible, and it is one of the more common upgrades. Both engines are petrol inline-4 units, so the engine bay and mounting points are similar, but the M10B18 needs its own wiring harness and ECU, the matching gearbox or clutch, and often a different sump, cooling and exhaust. The gain is 3 hp and 4 Nm. In Germany and most of Europe a swap must be inspected and registered; check with your testing station first.
Can I fit the M20B23 from the E30 323i into an E30 318i?
It is a conversion rather than a replacement. The M20B23 is an inline-6 and the M40B18 an inline-4, so mounts, sump, cooling, exhaust, wiring and ECU all change. The gain is 26 hp and 43 Nm. In Germany and most of Europe a swap must be inspected and registered; check with your testing station first.
Can I fit the M20B27 from the E30 325e into an E30 318i?
It is a conversion rather than a replacement. The M20B27 is an inline-6 and the M40B18 an inline-4, so mounts, sump, cooling, exhaust, wiring and ECU all change. The gain is 12 hp and 78 Nm. In Germany and most of Europe a swap must be inspected and registered; check with your testing station first.
Can I fit the S14B23 from the E30 M3 Evolution into an E30 318is?
It is possible, and it is one of the more common upgrades. Both engines are petrol inline-4 units, so the engine bay and mounting points are similar, but the S14B23 needs its own wiring harness and ECU, the matching gearbox or clutch, and often a different sump, cooling and exhaust. The gain is 60 hp and 65 Nm. In Germany and most of Europe a swap must be inspected and registered; check with your testing station first.
Can I fit the S14B23 from the E30 M3 into an E30 318is?
It is possible, and it is one of the more common upgrades. Both engines are petrol inline-4 units, so the engine bay and mounting points are similar, but the S14B23 needs its own wiring harness and ECU, the matching gearbox or clutch, and often a different sump, cooling and exhaust. The gain is 60 hp and 65 Nm. In Germany and most of Europe a swap must be inspected and registered; check with your testing station first.
Fitment and swap notes for the BMW E30 3 Series
- Four-cylinder E30s use different engine mounts, sumps and wiring from the sixes, so moving from a 316i or 318i to a 325i engine involves more than a straight swap.
- The M20 uses a timing belt; budget for a new belt, tensioner and water pump whatever the history says.
- M50 and M52 swaps are well documented and need an E36 engine harness and ECU, an oil pan to clear the E30 crossmember and a cooling solution.
- Original-engine E30 M3s are worth far more with their matching S14; collectors keep the engine number with the car's papers.
Engines from the same family usually share mounts and gearbox bolt patterns, but wiring, ECU, sump and cooling differ between versions. Moving to a different family is a conversion, not a replacement.
M10: The M10 responds to a sharper camshaft, a 2.0 litre conversion on 1.8 cars and twin Weber or Dellorto carburettors. Historic racers often fit a 2002 tii head and injection. Keep the original block if the car's identity matters.
M20: The classic upgrade is the M20 'stroker': a 2.7 eta block and crank with a 885 head from a 325i, giving more torque without losing the rev range. Chip tuning on Motronic cars and a free-flowing exhaust add modest gains.
M21 and M41: Few tuning options exist.
S14: Builds take the S14 to 2.5 litres and beyond with motorsport camshafts and pistons. For originality, most collectors keep it standard.
M40: There is little to gain from tuning an M40. Owners who want more power usually move to an M42 or M44, or swap to a six-cylinder.
M42 and M44: Popular upgrades are a re-mapped ECU, a 2.0 litre stroker kit and individual throttle bodies. Many owners use an M44 to replace a tired M42 in an E30 318is.
Known problems by engine in the BMW E30 3 Series
M10
- Camshaft and rocker wear. Remove the rocker cover and look at the lobes and rocker faces for pitting or a polished flat.
- Timing chain guides and tensioner. Listen at the front cover during the first seconds after a cold start.
- Warped head after overheating. Ask for a compression or leak-down test and check the coolant for oil.
- Valve stem seals. Watch the exhaust for the first ten seconds after a cold start.
- Oil leaks from age. Look under the bellhousing and around the front cover for fresh oil.
M20
- Timing belt failure. Ask for the date of the last belt and tensioner change. If there is no record, treat it as due.
- Cylinder head cracks. Pressure-test the cooling system and look for cracks when the cam cover is off.
- Rocker arm and shaft wear. Inspect rockers and clips with the cam cover removed.
- Oil spray bar and cam wear. Check the spray bar banjo bolts are tight and the holes clear.
- Water pump and thermostat. Look for coolant trails below the pump and on the belt cover.
M21 and M41
- Injection pump. Check for smoke and starting problems.
- Head cracks. Pressure-test the system.
- Timing belt (M21). Ask for the belt history.
S14
- Valve clearances. Ask for the last clearance check and a leak-down test.
- Timing chain and guides. Inspect guides and listen for a cold-start rattle.
- Throttle body linkage. Check for free play and even opening across the four throttles.
- Bearing wear on track engines. Look at the oil analysis or open the sump on unknown engines.
M40
- Timing belt. Look for a dated belt sticker or invoice.
- Camshaft lobe wear. Remove the cam cover and inspect the lobes.
- Rocker arms. Listen at idle with the oil hot.
- Cooling and thermostat. Check the hoses for swelling and the radiator tanks for cracks.
M42 and M44
- Head gasket. Check for mayonnaise under the oil cap and for coolant loss without visible leaks.
- Timing chain guides and tensioner. Listen at the front of the engine on a cold start.
- Valve cover and oil leaks. Pull a coil or plug lead and look for oil.
- Plastic cooling parts. Look for white coolant stains and check the water pump impeller type.
How to identify the right engine for your BMW E30 3 Series
Start with the VIN. The last seven characters identify your car in BMW's systems, and from them we can confirm the engine code, the production date, the gearbox and whether the car has xDrive. That is the only reliable way to order.
Next, check the stamp on the block. On most BMW four- and six-cylinder engines it sits on the left side of the block below the intake; on V engines it is usually at the back near the gearbox. The stamp shows the engine code and serial number.
Finally, compare the ancillaries. Two engines with the same code can carry different turbos, injectors, manifolds or sensors depending on the model and market. Our listings show what is fitted to each unit.
BMW E30 3 Series engine prices
We do not have a BMW E30 3 Series engine on the shelf at the moment. Send us your VIN or the code you need and the desk will tell you when the next unit arrives and what it will cost.
BMW E30 3 Series engines in stock now
Buying checklist for a BMW E30 3 Series engine
- Confirm the exact engine code. Read the code stamped on the block and compare it with the code for your car. Send us the last seven characters of the VIN and we confirm the match before anything is paid.
- Ask how the donor car was damaged. Most good used engines come from cars with body damage. A front-end impact can crack sensors, the timing cover or the sump; a rear or side impact usually leaves the engine untouched. The yard records the damage on each unit.
- Compression or leak-down figures. Even compression across all cylinders tells you more than mileage. Ask for the figures, not just a pass or fail, and compare the highest and lowest readings: a spread above 10 to 15 percent deserves a question.
- Look at the oil and coolant. Clean oil without metal particles and coolant without oil are good signs. Milky oil, oily coolant or a burnt smell mean the engine needs further checks before it is fitted.
- Photographs from every side. Good suppliers photograph the actual engine you will receive. Look for the block stamp, the sump, the timing cover and any broken brackets or connectors in the pictures.
- List of what is fitted. Engines are sold with different ancillaries: some have the turbo, injectors, manifolds, alternator and starter, others are long blocks. Agree the list in writing so you know which parts must come from your old engine.
- Sump, oil pickup and drive variants. Rear-drive, xDrive and front-drive cars can use different sumps, oil pickups and engine mounts even with the same engine code. Check that the sump matches your subframe and front axle.
- Gearbox and flywheel match. Manual and automatic engines differ at the flywheel or flexplate, and sometimes at the crankshaft spigot. Make sure the engine you buy matches your gearbox or that you transfer the right parts.
- Warranty terms in writing. Read what the warranty covers, how long it runs and what fitting conditions apply. Most warranties require a qualified workshop, new fluids and filters, and replacement of the cooling parts that caused the original failure.
- Why your old engine failed. Before fitting a replacement, find out why the original failed. An overheating radiator, a blocked intercooler or a failed turbo can destroy a second engine if they are not fixed.
- Turbocharger shaft play and oil. Rotate the compressor wheel by hand. A small amount of side play is normal; in-and-out play or wheel contact with the housing is not. Oil pooled in the intake or intercooler pipes points to worn seals.
- Injector correction values. On a diesel that can be run before removal, the injector correction values show whether one injector is delivering more or less fuel than the others. Large deviations mean an injector is on its way out.
- Timing chain noise. Listen for a rattle at the front of the engine for the first seconds after a cold start. On an engine that cannot be run, look at the chain guides through the oil filler or with the valve cover off.
- Timing belt history. A timing belt must be changed on time and distance. With no dated record, treat the belt, tensioner and water pump as due and replace them before the first start.
- Bearing and valve clearance history. M engines are built to tighter tolerances. Ask for the last rod bearing replacement and valve clearance check, and consider an oil analysis if the engine can be run.
- Originality and numbers. For collectible cars, the engine number and correct ancillaries add value. Photograph the stamp and keep it with the car's documents.
Fitting an engine to your BMW E30 3 Series
- Compare the engines side by side. Put the replacement next to the old engine and compare sensors, brackets, connectors, the sump, the starter and the flywheel or flexplate. Note anything that must be transferred.
- Transfer the parts that differ. Move the parts that are specific to your car, such as the engine harness on some models, the sump on xDrive cars or the air conditioning compressor bracket. Use new seals and gaskets for everything you move.
- Replace the rear main seal and drive parts. With the engine out, the rear crankshaft seal is easy to reach. Fit a new one, inspect the flywheel and clutch on manual cars or the converter seal on automatics.
- Renew the cooling system. Most engine failures start with cooling. Fit a new water pump, thermostat and hoses, check the radiator and fan, and use the correct coolant.
- Fit new engine mounts. Old mounts transfer vibration and can let the engine move enough to damage hoses. They are cheap and easy to replace with the engine out.
- Inspect or replace the timing chain parts. Look at the guides and tensioner. On high-mileage engines, replacing them now costs far less than doing it later.
- Fit a new timing belt kit. Fit a new belt, tensioner and water pump and set the timing with the correct tools before the first start.
- Prepare the turbo. Fit new oil feed and return seals, clean the intercooler and pipes of any oil or debris from the old engine, and prime the turbo with oil before starting.
- Code the injectors and bleed the fuel. Enter the injector correction codes into the ECU, check the glow plugs and bleed the fuel system so the engine does not crank dry.
- Clean the intake. If the old engine failed internally, debris can be in the intake or intercooler. Clean them so nothing reaches the new engine.
- Fill with the right oil and prime it. Fill with new oil of the correct specification and a new filter. Crank with the fuel and ignition disabled until oil pressure builds.
- Coding and adaptations. On modern BMWs, the engine ECU must be matched to the car's immobiliser (CAS, FEM or BDC). Reset adaptations, register the battery and clear faults with diagnostic software.
- First start and leak check. Start the engine, let it idle and watch oil pressure, temperature and fault codes. Check for leaks and bleed the cooling system.
- First 1,000 km. Drive gently for the first few hundred kilometres, vary the engine speed and avoid full load. Change the oil and filter after about 1,000 km to remove any assembly debris.
Diagnosing engine trouble in a BMW E30 3 Series
If your current engine is showing one of these symptoms, this table helps you judge whether it can be repaired or whether a replacement engine is the better route.
| Symptom | Likely cause |
|---|---|
| Knocking from the bottom of the engine | A deep knock that rises with engine speed usually means worn rod or main bearings. |
| Overheating or losing coolant | Coolant loss without visible leaks points to a head gasket or a cracked head; visible leaks point to the water pump, hoses, thermostat housing or expansion tank. |
| White smoke that smells sweet | Coolant burning in the cylinders, from a head gasket, a cracked head or, on diesels, a leaking EGR cooler. |
| Blue smoke | Oil burning in the cylinders. |
| Rough idle or misfire | Ignition coils, spark plugs, injectors and vacuum leaks are the usual causes. |
| Loss of power | Start with the simple things: air filter, boost leaks on turbo engines, fuel pressure and fault codes. |
| Rattle for a few seconds after a cold start | The classic sign of a weak timing chain tensioner or stretched chain. |
| Whistle, loss of boost or limp mode | A split charge pipe, a sticking wastegate or worn turbo bearings. |
| Black smoke under acceleration | Too much fuel for the air available: boost leaks, a sticking EGR valve, a dirty air mass meter or a leaking injector. |
| Hard starting when cold | Glow plugs or the glow plug control unit. |
| Engine stops suddenly and will not restart | On belt-driven engines, a snapped timing belt. |
| Oil pressure warning or bearing noise at high revs | On M engines, a warning at high revs can be the first sign of bearing wear. |
Knocking from the bottom of the engine. A deep knock that rises with engine speed usually means worn rod or main bearings. Stop driving: bearing failure ends with a broken connecting rod. A used engine is normally the most economical fix once the bottom end is damaged.
Overheating or losing coolant. Coolant loss without visible leaks points to a head gasket or a cracked head; visible leaks point to the water pump, hoses, thermostat housing or expansion tank. Overheating should be fixed before it warps the head.
White smoke that smells sweet. Coolant burning in the cylinders, from a head gasket, a cracked head or, on diesels, a leaking EGR cooler. Check the coolant level and look for oil in the coolant.
Blue smoke. Oil burning in the cylinders. A puff on start-up points to valve stem seals; constant smoke under load points to piston rings or, on turbo engines, turbo seals.
Rough idle or misfire. Ignition coils, spark plugs, injectors and vacuum leaks are the usual causes. A misfire on one cylinder that moves when you swap coils is a coil; one that stays is a plug, injector or compression problem.
Loss of power. Start with the simple things: air filter, boost leaks on turbo engines, fuel pressure and fault codes. A gradual loss with poor compression on a test points to internal wear.
Rattle for a few seconds after a cold start. The classic sign of a weak timing chain tensioner or stretched chain. It must be checked quickly: a chain that jumps a tooth can bend valves.
Whistle, loss of boost or limp mode. A split charge pipe, a sticking wastegate or worn turbo bearings. Check the pipes first, then the turbo shaft for play.
Black smoke under acceleration. Too much fuel for the air available: boost leaks, a sticking EGR valve, a dirty air mass meter or a leaking injector.
Hard starting when cold. Glow plugs or the glow plug control unit. On older diesels, also check the injection pump and fuel lines for air leaks.
Engine stops suddenly and will not restart. On belt-driven engines, a snapped timing belt. Do not keep cranking: on an interference engine the valves are probably already bent.
Oil pressure warning or bearing noise at high revs. On M engines, a warning at high revs can be the first sign of bearing wear. Check the oil level and stop driving hard until it is diagnosed.
Repair or replace the engine in your BMW E30 3 Series?
As a rule, bolt-on faults are worth repairing and internal damage is not. Seals, sensors, coils, injectors, pumps and turbos can be replaced in the car. Once the bearings, crankshaft, bores or head of an engine are damaged, a used engine is usually cheaper and quicker than a rebuild.
M engines are expensive to rebuild because parts are costly and specialist labour is needed. A used M engine with documented bearings is often the better value for road cars.
Ask your workshop for a written diagnosis before deciding. A compression test, an oil analysis and a borescope inspection take an hour or two and remove most of the guesswork.
Delivery, warranty and payment
Before a BMW E30 3 Series engine leaves our Hamburg yard it is drained of oil and coolant, every opening is sealed, and it is strapped to a pallet and wrapped. We send photographs of the packed unit and the tracking details.
Delivery is door to door and included in the price. Most European addresses receive the engine within five to ten working days; Germany and its neighbours are usually faster.
Every engine carries a 12-month warranty on eligible internal failure when a qualified workshop fits it with new fluids and filters. Payment is by card, bank transfer or crypto; your invoice is emailed as soon as you order.
We deliver BMW E30 3 Series engines from Hamburg to customers across Europe and beyond. Typical door-to-door times and customs status:
| Country | Typical delivery | Customs and VAT |
|---|---|---|
| Germany | 2–4 working days | No customs; German VAT on the invoice |
| Netherlands | 3–5 working days | EU delivery, no customs |
| Belgium | 3–5 working days | EU delivery, no customs |
| Austria | 3–5 working days | EU delivery, no customs |
| Denmark | 3–5 working days | EU delivery, no customs |
| Poland | 3–6 working days | EU delivery, no customs |
| Czech Republic | 3–6 working days | EU delivery, no customs |
| France | 4–7 working days | EU delivery, no customs |
| Italy | 5–8 working days | EU delivery, no customs |
| Spain | 5–8 working days | EU delivery, no customs |
| Portugal | 6–9 working days | EU delivery, no customs |
| Sweden | 5–8 working days | EU delivery, no customs |
| Norway | 6–10 working days | Export; import VAT and duty in Norway |
| Switzerland | 5–8 working days | Export; import VAT and duty in Switzerland |
| United Kingdom | 5–10 working days | Export; UK import VAT and duty on arrival |
| Ireland | 6–10 working days | EU delivery, no customs |
| United States | Quoted per order | Export; US import duties apply |
| United Arab Emirates | Quoted per order | Export; UAE import duties apply |
Times are typical for pallet delivery after dispatch and can vary with holidays and remote addresses. Business buyers in the EU with a valid VAT number can order without German VAT.
Questions about BMW E30 3 Series engines
Will the M10B18 engine fit my BMW E30 316?
Yes, if your BMW E30 316 was built with the M10B18. BMW used this 1.8 liter (1,766 cc) petrol engine with 77 kW (105 HP) in the E30 316 from about 1975 to 1988.
In our records the M10B18 is the engine for the E30 316, which makes the match simple. Still, check the code on your old engine or send us your VIN.
Also tell us if your E30 has a manual or an automatic gearbox. The flywheel or the flex plate and some sensors depend on it.
Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.
See all M10 Engines · Search M10B18 in the shop
How much is a replacement M10B18 engine for a BMW E30 316?
A used M10B18 for the BMW E30 316 costs from about 800 € to 1.450 € in our yard. The price depends on the year, the mileage and the parts that come with the engine.
Shipping is a flat 249 € per order. It is added once at checkout and printed on the invoice, so there is no extra fee later. Inside the EU there is no import duty. Outside the EU, the receiver pays local duty and VAT.
A replacement engine is often much cheaper than rebuilding a damaged one, and much faster. The M10B18 you buy is photographed and checked in Hamburg before it is listed.
Eligible engines come with a 12 months warranty from the delivery date. It covers internal mechanical failure under normal use and correct fitting by a qualified mechanic or workshop. Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.
See all M10 Engines · Search M10B18 in the shop
Will the M10B18 engine fit my BMW E30 318i?
Yes, if your BMW E30 318i was built with the M10B18. BMW used this 1.8 liter (1,766 cc) petrol engine with 77 kW (105 HP) in the E30 318i from about 1975 to 1988.
Some E30 318i cars were built with a different engine: the M40B18. These look alike from the outside, so check the code on your engine or send us your VIN.
Also tell us if your E30 has a manual or an automatic gearbox. The flywheel or the flex plate and some sensors depend on it.
Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.
See all M10 Engines · Search M10B18 in the shop
How much is a replacement M10B18 engine for a BMW E30 318i?
A used M10B18 for the BMW E30 318i costs from about 800 € to 1.450 € in our yard. The price depends on the year, the mileage and the parts that come with the engine.
Shipping is a flat 249 € per order. It is added once at checkout and printed on the invoice, so there is no extra fee later. Inside the EU there is no import duty. Outside the EU, the receiver pays local duty and VAT.
A replacement engine is often much cheaper than rebuilding a damaged one, and much faster. The M10B18 you buy is photographed and checked in Hamburg before it is listed.
Eligible engines come with a 12 months warranty from the delivery date. It covers internal mechanical failure under normal use and correct fitting by a qualified mechanic or workshop. Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.
See all M10 Engines · Search M10B18 in the shop
Will the M40B18 engine fit my BMW E30 318i?
Yes, if your BMW E30 318i was built with the M40B18. BMW used this 1.8 liter (1,796 cc) petrol engine with 83 kW (113 HP) in the E30 318i from about 1987 to 1994.
Some E30 318i cars were built with a different engine: the M10B18. These look alike from the outside, so check the code on your engine or send us your VIN.
Also tell us if your E30 has a manual or an automatic gearbox. The flywheel or the flex plate and some sensors depend on it.
Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.
See all M40 Engines · Search M40B18 in the shop
How much is a replacement M40B18 engine for a BMW E30 318i?
A used M40B18 for the BMW E30 318i costs from about 700 € to 1.350 € in our yard. The price depends on the year, the mileage and the parts that come with the engine.
Shipping is a flat 249 € per order. It is added once at checkout and printed on the invoice, so there is no extra fee later. Inside the EU there is no import duty. Outside the EU, the receiver pays local duty and VAT.
A replacement engine is often much cheaper than rebuilding a damaged one, and much faster. The M40B18 you buy is photographed and checked in Hamburg before it is listed.
Eligible engines come with a 12 months warranty from the delivery date. It covers internal mechanical failure under normal use and correct fitting by a qualified mechanic or workshop. Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.
See all M40 Engines · Search M40B18 in the shop
Will the M20B25 engine fit my BMW E30 325i?
Yes, if your BMW E30 325i was built with the M20B25. BMW used this 2.5 liter (2,494 cc) petrol engine with 126 kW (171 HP) in the E30 325i from about 1985 to 1993.
In our records the M20B25 is the engine for the E30 325i, which makes the match simple. Still, check the code on your old engine or send us your VIN.
Also tell us if your E30 has a manual or an automatic gearbox. The flywheel or the flex plate and some sensors depend on it.
Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.
See all M20 Engines · Search M20B25 in the shop
How much is a replacement M20B25 engine for a BMW E30 325i?
A used M20B25 for the BMW E30 325i costs from about 1.300 € to 2.200 € in our yard. The price depends on the year, the mileage and the parts that come with the engine.
Shipping is a flat 249 € per order. It is added once at checkout and printed on the invoice, so there is no extra fee later. Inside the EU there is no import duty. Outside the EU, the receiver pays local duty and VAT.
A replacement engine is often much cheaper than rebuilding a damaged one, and much faster. The M20B25 you buy is photographed and checked in Hamburg before it is listed.
Eligible engines come with a 12 months warranty from the delivery date. It covers internal mechanical failure under normal use and correct fitting by a qualified mechanic or workshop. Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.
See all M20 Engines · Search M20B25 in the shop
Will the M20B25 engine fit my BMW E30 325is?
Yes, if your BMW E30 325is was built with the M20B25. BMW used this 2.5 liter (2,494 cc) petrol engine with 126 kW (171 HP) in the E30 325is from about 1985 to 1993.
In our records the M20B25 is the engine for the E30 325is, which makes the match simple. Still, check the code on your old engine or send us your VIN.
Also tell us if your E30 has a manual or an automatic gearbox. The flywheel or the flex plate and some sensors depend on it.
Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.
See all M20 Engines · Search M20B25 in the shop
How much is a replacement M20B25 engine for a BMW E30 325is?
A used M20B25 for the BMW E30 325is costs from about 1.300 € to 2.200 € in our yard. The price depends on the year, the mileage and the parts that come with the engine.
Shipping is a flat 249 € per order. It is added once at checkout and printed on the invoice, so there is no extra fee later. Inside the EU there is no import duty. Outside the EU, the receiver pays local duty and VAT.
A replacement engine is often much cheaper than rebuilding a damaged one, and much faster. The M20B25 you buy is photographed and checked in Hamburg before it is listed.
Eligible engines come with a 12 months warranty from the delivery date. It covers internal mechanical failure under normal use and correct fitting by a qualified mechanic or workshop. Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.
See all M20 Engines · Search M20B25 in the shop
Will the M20B20 engine fit my BMW E30 320i?
Yes, if your BMW E30 320i was built with the M20B20. BMW used this 2.0 liter (1,991 cc) petrol engine with 95 kW (129 HP) in the E30 320i from about 1977 to 1992.
In our records the M20B20 is the engine for the E30 320i, which makes the match simple. Still, check the code on your old engine or send us your VIN.
Also tell us if your E30 has a manual or an automatic gearbox. The flywheel or the flex plate and some sensors depend on it.
Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.
See all M20 Engines · Search M20B20 in the shop
How much is a replacement M20B20 engine for a BMW E30 320i?
A used M20B20 for the BMW E30 320i costs from about 1.000 € to 1.700 € in our yard. The price depends on the year, the mileage and the parts that come with the engine.
Shipping is a flat 249 € per order. It is added once at checkout and printed on the invoice, so there is no extra fee later. Inside the EU there is no import duty. Outside the EU, the receiver pays local duty and VAT.
A replacement engine is often much cheaper than rebuilding a damaged one, and much faster. The M20B20 you buy is photographed and checked in Hamburg before it is listed.
Eligible engines come with a 12 months warranty from the delivery date. It covers internal mechanical failure under normal use and correct fitting by a qualified mechanic or workshop. Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.
See all M20 Engines · Search M20B20 in the shop
Will the M42B18 engine fit my BMW E30 318is?
Yes, if your BMW E30 318is was built with the M42B18. BMW used this 1.8 liter (1,796 cc) petrol engine with 100 kW (136 HP) in the E30 318is from about 1989 to 1996.
In our records the M42B18 is the engine for the E30 318is, which makes the match simple. Still, check the code on your old engine or send us your VIN.
Also tell us if your E30 has a manual or an automatic gearbox. The flywheel or the flex plate and some sensors depend on it.
Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.
See all M42 Engines · Search M42B18 in the shop
How much is a replacement M42B18 engine for a BMW E30 318is?
A used M42B18 for the BMW E30 318is costs from about 1.150 € to 1.950 € in our yard. The price depends on the year, the mileage and the parts that come with the engine.
Shipping is a flat 249 € per order. It is added once at checkout and printed on the invoice, so there is no extra fee later. Inside the EU there is no import duty. Outside the EU, the receiver pays local duty and VAT.
A replacement engine is often much cheaper than rebuilding a damaged one, and much faster. The M42B18 you buy is photographed and checked in Hamburg before it is listed.
Eligible engines come with a 12 months warranty from the delivery date. It covers internal mechanical failure under normal use and correct fitting by a qualified mechanic or workshop. Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.
See all M42 Engines · Search M42B18 in the shop
Will the S14B23 engine fit my BMW E30 M3?
Yes, if your BMW E30 M3 was built with the S14B23. BMW used this 2.3 liter (2,302 cc) petrol engine with 147 kW (200 HP) in the E30 M3 from about 1986 to 1991.
In our records the S14B23 is the engine for the E30 M3, which makes the match simple. Still, check the code on your old engine or send us your VIN.
Also tell us if your E30 has a manual or an automatic gearbox. The flywheel or the flex plate and some sensors depend on it.
Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.
See all S14 Engines · Search S14B23 in the shop
How much is a replacement S14B23 engine for a BMW E30 M3?
A used S14B23 for the BMW E30 M3 costs from about 5.850 € to 8.950 € in our yard. The price depends on the year, the mileage and the parts that come with the engine.
Shipping is a flat 249 € per order. It is added once at checkout and printed on the invoice, so there is no extra fee later. Inside the EU there is no import duty. Outside the EU, the receiver pays local duty and VAT.
A replacement engine is often much cheaper than rebuilding a damaged one, and much faster. The S14B23 you buy is photographed and checked in Hamburg before it is listed.
Eligible engines come with a 12 months warranty from the delivery date. It covers internal mechanical failure under normal use and correct fitting by a qualified mechanic or workshop. Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.
See all S14 Engines · Search S14B23 in the shop
Will the S14B23 engine fit my BMW E30 M3 Evolution?
Yes, if your BMW E30 M3 Evolution was built with the S14B23. BMW used this 2.3 liter (2,302 cc) petrol engine with 147 kW (200 HP) in the E30 M3 Evolution from about 1986 to 1991.
In our records the S14B23 is the engine for the E30 M3 Evolution, which makes the match simple. Still, check the code on your old engine or send us your VIN.
Also tell us if your E30 has a manual or an automatic gearbox. The flywheel or the flex plate and some sensors depend on it.
Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.
See all S14 Engines · Search S14B23 in the shop
How much is a replacement S14B23 engine for a BMW E30 M3 Evolution?
A used S14B23 for the BMW E30 M3 Evolution costs from about 5.850 € to 8.950 € in our yard. The price depends on the year, the mileage and the parts that come with the engine.
Shipping is a flat 249 € per order. It is added once at checkout and printed on the invoice, so there is no extra fee later. Inside the EU there is no import duty. Outside the EU, the receiver pays local duty and VAT.
A replacement engine is often much cheaper than rebuilding a damaged one, and much faster. The S14B23 you buy is photographed and checked in Hamburg before it is listed.
Eligible engines come with a 12 months warranty from the delivery date. It covers internal mechanical failure under normal use and correct fitting by a qualified mechanic or workshop. Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.
See all S14 Engines · Search S14B23 in the shop
Will the S14B23 engine fit my BMW E30 M3 Sport Evolution?
Yes, if your BMW E30 M3 Sport Evolution was built with the S14B23. BMW used this 2.3 liter (2,302 cc) petrol engine with 147 kW (200 HP) in the E30 M3 Sport Evolution from about 1986 to 1991.
In our records the S14B23 is the engine for the E30 M3 Sport Evolution, which makes the match simple. Still, check the code on your old engine or send us your VIN.
Also tell us if your E30 has a manual or an automatic gearbox. The flywheel or the flex plate and some sensors depend on it.
Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.
See all S14 Engines · Search S14B23 in the shop
How much is a replacement S14B23 engine for a BMW E30 M3 Sport Evolution?
A used S14B23 for the BMW E30 M3 Sport Evolution costs from about 5.850 € to 8.950 € in our yard. The price depends on the year, the mileage and the parts that come with the engine.
Shipping is a flat 249 € per order. It is added once at checkout and printed on the invoice, so there is no extra fee later. Inside the EU there is no import duty. Outside the EU, the receiver pays local duty and VAT.
A replacement engine is often much cheaper than rebuilding a damaged one, and much faster. The S14B23 you buy is photographed and checked in Hamburg before it is listed.
Eligible engines come with a 12 months warranty from the delivery date. It covers internal mechanical failure under normal use and correct fitting by a qualified mechanic or workshop. Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.
See all S14 Engines · Search S14B23 in the shop
Can I put a 2JZ-GTE engine in my BMW E30?
Yes. We sell conversion kits that fit the 2JZ-GTE into the BMW E30. The kit replaces the M50, M52 and M54, and works with the Getrag 420G, ZF GS6 and R154.
You can buy the full package with an engine, or only the parts you need: complete conversion with engine, complete conversion, adapter plate, engine mount, wiring and ecu and cooling and exhaust.
A swap like this needs a skilled workshop. Mounts, the adapter, the wiring and the engine computer, the cooling and the exhaust all have to work together. Check your local road rules for engine swaps before you start.
Tell us your BMW E30's year and current set-up, and we suggest the right parts. You can reach the Hamburg desk by email at autowerkeengines@gmail.com, or by phone and WhatsApp on +49 15510 030835, Monday to Friday, 9:00 to 16:00 CET.
See all 2JZ BMW Conversion Kits · Conversion guide
Can I put an S54B32 engine in my BMW E30?
Yes. We sell conversion kits that fit the S54B32 into the BMW E30. The kit replaces the M20, M50 and M52, and works with the ZF GS6-37 and Getrag 250.
You can buy the full package with an engine, or only the parts you need: complete conversion with engine, complete conversion, adapter plate, engine mount, wiring and ecu and cooling and exhaust.
A swap like this needs a skilled workshop. Mounts, the adapter, the wiring and the engine computer, the cooling and the exhaust all have to work together. Check your local road rules for engine swaps before you start.
Tell us your BMW E30's year and current set-up, and we suggest the right parts. You can reach the Hamburg desk by email at autowerkeengines@gmail.com, or by phone and WhatsApp on +49 15510 030835, Monday to Friday, 9:00 to 16:00 CET.
See all S54 BMW Conversion Kits · Conversion guide
What is in the M54 E30 complete conversion with engine kit?
The M54 E30 complete conversion with engine kit includes: Inspected M54B30 long engine, compression recorded; BMW E30 325i engine mounts and brackets; Adapter plate, clutch and flywheel; Wiring patch loom and ECU bridge; Intercooler pipes, radiator hoses and downpipe; Fitting notes and torque sheet.
It is made for the BMW E30 325i, BMW E30 320i and BMW E30 Touring (1982–1994), and replaces the M20B25, M20B20 and M42. Gearbox set-ups we support are the Getrag 260 and ZF S5D.
This kit costs about 7.370 € to 9.840 €, depending on the exact listing. It includes an inspected M54B30 engine, so you get everything from one place.
Shipping is a flat 249 € per order. It is added once at checkout and printed on the invoice, so there is no extra fee later. If you are not sure which kit you need, tell us your vehicle, its year and its current engine and gearbox. We help for free.
See all M54 E30 Conversion Kits · Conversion guide
What is in the M54 E30 complete conversion kit?
The M54 E30 complete conversion kit includes: BMW E30 325i engine mounts for a M54B30; Bellhousing adapter, clutch and flywheel; Custom engine loom and sensor patch; Cooling hoses, intercooler pipes and downpipe; Power-steering and fuel-line kit; Step-by-step fitting guide.
It is made for the BMW E30 325i, BMW E30 320i and BMW E30 Touring (1982–1994), and replaces the M20B25, M20B20 and M42. Gearbox set-ups we support are the Getrag 260 and ZF S5D.
This kit costs about 2.620 € to 3.630 €, depending on the exact listing. The engine is not included, so you can use your own M54B30 or buy one from our yard.
Shipping is a flat 249 € per order. It is added once at checkout and printed on the invoice, so there is no extra fee later. If you are not sure which kit you need, tell us your vehicle, its year and its current engine and gearbox. We help for free.
See all M54 E30 Conversion Kits · Conversion guide
What is in the M54 E30 adapter plate kit?
The M54 E30 adapter plate kit includes: M54B30 to gearbox adapter plate, machined; Dowels, bolts and alignment sleeve; Pilot bearing; Clutch alignment tool; Fitment drawing.
It is made for the BMW E30 325i, BMW E30 320i and BMW E30 Touring (1982–1994), and replaces the M20B25, M20B20 and M42. Gearbox set-ups we support are the Getrag 260 and ZF S5D.
This kit costs about 660 € to 1.080 €, depending on the exact listing. The engine is not included, so you can use your own M54B30 or buy one from our yard.
Shipping is a flat 249 € per order. It is added once at checkout and printed on the invoice, so there is no extra fee later. If you are not sure which kit you need, tell us your vehicle, its year and its current engine and gearbox. We help for free.
See all M54 E30 Conversion Kits · Conversion guide
What is in the M54 E30 engine mount kit?
The M54 E30 engine mount kit includes: Left and right BMW E30 325i chassis mounts; M54B30 side brackets; Polyurethane bushes; Hardware kit.
It is made for the BMW E30 325i, BMW E30 320i and BMW E30 Touring (1982–1994), and replaces the M20B25, M20B20 and M42. Gearbox set-ups we support are the Getrag 260 and ZF S5D.
This kit costs about 360 € to 570 €, depending on the exact listing. The engine is not included, so you can use your own M54B30 or buy one from our yard.
Shipping is a flat 249 € per order. It is added once at checkout and printed on the invoice, so there is no extra fee later. If you are not sure which kit you need, tell us your vehicle, its year and its current engine and gearbox. We help for free.
See all M54 E30 Conversion Kits · Conversion guide
What is in the M54 E30 wiring and ecu kit?
The M54 E30 wiring and ecu kit includes: M54B30 patch loom for the BMW E30 325i; ECU bridge connector; Immobiliser bypass or coded ECU; Sensor pinout sheet; Fuse and relay map.
It is made for the BMW E30 325i, BMW E30 320i and BMW E30 Touring (1982–1994), and replaces the M20B25, M20B20 and M42. Gearbox set-ups we support are the Getrag 260 and ZF S5D.
This kit costs about 500 € to 820 €, depending on the exact listing. The engine is not included, so you can use your own M54B30 or buy one from our yard.
Shipping is a flat 249 € per order. It is added once at checkout and printed on the invoice, so there is no extra fee later. If you are not sure which kit you need, tell us your vehicle, its year and its current engine and gearbox. We help for free.
See all M54 E30 Conversion Kits · Conversion guide
What is in the M54 E30 cooling and exhaust kit?
The M54 E30 cooling and exhaust kit includes: Radiator hoses made for this swap; Intercooler pipe set; Downpipe and flex section; Expansion tank adapter; Temperature sender adapter.
It is made for the BMW E30 325i, BMW E30 320i and BMW E30 Touring (1982–1994), and replaces the M20B25, M20B20 and M42. Gearbox set-ups we support are the Getrag 260 and ZF S5D.
This kit costs about 450 € to 740 €, depending on the exact listing. The engine is not included, so you can use your own M54B30 or buy one from our yard.
Shipping is a flat 249 € per order. It is added once at checkout and printed on the invoice, so there is no extra fee later. If you are not sure which kit you need, tell us your vehicle, its year and its current engine and gearbox. We help for free.
See all M54 E30 Conversion Kits · Conversion guide
Can I put an M54B30 engine in my BMW E30 325i?
Yes. We sell conversion kits that fit the M54B30 into the BMW E30 325i. The kit replaces the M20B25, M20B20 and M42, and works with the Getrag 260 and ZF S5D.
You can buy the full package with an engine, or only the parts you need: complete conversion with engine, complete conversion, adapter plate, engine mount, wiring and ecu and cooling and exhaust.
A swap like this needs a skilled workshop. Mounts, the adapter, the wiring and the engine computer, the cooling and the exhaust all have to work together. Check your local road rules for engine swaps before you start.
Tell us your BMW E30 325i's year and current set-up, and we suggest the right parts. You can reach the Hamburg desk by email at autowerkeengines@gmail.com, or by phone and WhatsApp on +49 15510 030835, Monday to Friday, 9:00 to 16:00 CET.
See all M54 E30 Conversion Kits · Conversion guide
Can I put an M54B30 engine in my BMW E30 320i?
Yes. We sell conversion kits that fit the M54B30 into the BMW E30 320i. The kit replaces the M20B25, M20B20 and M42, and works with the Getrag 260 and ZF S5D.
You can buy the full package with an engine, or only the parts you need: complete conversion with engine, complete conversion, adapter plate, engine mount, wiring and ecu and cooling and exhaust.
A swap like this needs a skilled workshop. Mounts, the adapter, the wiring and the engine computer, the cooling and the exhaust all have to work together. Check your local road rules for engine swaps before you start.
Tell us your BMW E30 320i's year and current set-up, and we suggest the right parts. You can reach the Hamburg desk by email at autowerkeengines@gmail.com, or by phone and WhatsApp on +49 15510 030835, Monday to Friday, 9:00 to 16:00 CET.
See all M54 E30 Conversion Kits · Conversion guide
Can I put an M54B30 engine in my BMW E30 Touring?
Yes. We sell conversion kits that fit the M54B30 into the BMW E30 Touring. The kit replaces the M20B25, M20B20 and M42, and works with the Getrag 260 and ZF S5D.
You can buy the full package with an engine, or only the parts you need: complete conversion with engine, complete conversion, adapter plate, engine mount, wiring and ecu and cooling and exhaust.
A swap like this needs a skilled workshop. Mounts, the adapter, the wiring and the engine computer, the cooling and the exhaust all have to work together. Check your local road rules for engine swaps before you start.
Tell us your BMW E30 Touring's year and current set-up, and we suggest the right parts. You can reach the Hamburg desk by email at autowerkeengines@gmail.com, or by phone and WhatsApp on +49 15510 030835, Monday to Friday, 9:00 to 16:00 CET.
See all M54 E30 Conversion Kits · Conversion guide
How hard is an M54 E30 swap?
A M54B30 swap into the BMW E30 325i, BMW E30 320i and BMW E30 Touring is a big job, but a good workshop can do it with a complete kit. Most of the time goes into the mounts, the adapter and the wiring.
The usual steps are: remove the old engine, fit the new mounts and the adapter plate, set the engine in, connect the wiring and the engine computer, then fit the cooling and the exhaust. A test drive and a final check follow.
Our kits come with parts that are made to work together, which saves time and guesswork. What we list: M54 3.0 kits for the E30, with mounts, sump clearance and loom.
Before you start, check your local rules for registration and road tests after an engine change. We supply invoices and documents that help with this.
See all M54 E30 Conversion Kits · Conversion guide
Can I put an LS3 engine in my BMW E30?
Yes. We sell conversion kits that fit the LS3 into the BMW E30. The kit replaces the M50, M54 and S52, and works with the T56, TR6060 and ZF GS6.
You can buy the full package with an engine, or only the parts you need: complete conversion with engine, complete conversion, adapter plate, engine mount, wiring and ecu and cooling and exhaust.
A swap like this needs a skilled workshop. Mounts, the adapter, the wiring and the engine computer, the cooling and the exhaust all have to work together. Check your local road rules for engine swaps before you start.
Tell us your BMW E30's year and current set-up, and we suggest the right parts. You can reach the Hamburg desk by email at autowerkeengines@gmail.com, or by phone and WhatsApp on +49 15510 030835, Monday to Friday, 9:00 to 16:00 CET.
See all LS BMW Conversion Kits · Conversion guide
Glossary
- Wastegate — A valve that lets exhaust gas bypass the turbine to control boost pressure. Worn wastegates rattle and can cause boost faults.
- Common rail — A diesel injection system with a high-pressure fuel rail feeding all injectors. It allows precise, multiple injections per cycle.
- Long block — An engine with the block, head and internals but without most ancillaries such as manifolds, turbo, alternator or starter.
- Dressed engine — An engine with most ancillaries fitted, ready to install with fewer parts transferred.
- Compression test — A measurement of the pressure each cylinder builds when cranked. Even readings show healthy rings and valves.
- Leak-down test — A test that pressurises each cylinder and measures how much air escapes, showing where any leak is.
- LCI — Life Cycle Impulse, BMW's name for a mid-life update. Engines often change at the LCI.
- xDrive — BMW's all-wheel-drive system. xDrive cars often use a different sump and oil pickup.
- DME — Digital Motor Electronics, BMW's name for the engine control unit.
- CAS, FEM and BDC — The immobiliser and body modules that must be matched to the engine control unit on modern BMWs.
- Rod bearings — The bearings between the connecting rods and the crankshaft. On several M engines they wear and are replaced preventively.
- ITB — Individual throttle bodies, one per cylinder, used on most naturally aspirated M engines for sharp response.
- Timing chain tensioner — A hydraulic or spring device that keeps the timing chain tight. Worn tensioners cause cold-start rattle.
- Timing belt — A rubber belt that drives the camshaft. It must be replaced on time to avoid valve damage.
- TU — Technical Update, BMW's suffix for a revised version of an engine.
Our verdict
The BMW E30 3 Series offers a wide choice of engines, and the right replacement depends on your exact model, build date and gearbox. Confirm the code with your VIN, choose a unit with known history, replace the known weak parts while it is out, and the car will be back on the road for years.
See every BMW E30 3 Series engine in stock, or ask the Hamburg desk to check your VIN.
