BMW M43 engine: the complete buyer's guide

The M43 is the economical eight-valve four-cylinder that powered the E36 316i and 318i, the E46 316i and 318i, the Z3 1.8 and the E34 518i. It replaced the belt-driven M40 with a chain-driven design.

It is a common engine and parts are cheap, which makes it a sensible replacement for a tired E36 or E46 four-cylinder. Its known weak spot is the plastic timing chain guide, and most buyers should replace that guide when they fit a used unit.

• Production: 1993–2002
• Versions covered: M43B16, M43B18 and M43B19
• Output range: 102–118 hp
• Fuel and layout: petrol inline-4
• Fitted to: 5 BMW models across 3 chassis generations
• In our stock now: ask the desk for the next arrival — browse all M43 engines

The M43 at a glance

The table lists every M43 version we supply with its capacity, layout, output and production years. Use it with your car's engine code to find the right unit.

Across 3 versions, output runs from 102 to 118 hp. The spread reflects different capacities, tuning for different markets and the technical updates BMW made over 10 years of production.

History of the M43

Introduced in 1993 at 1.6 and 1.8 litres, the M43 used a single camshaft driven by a chain and hydraulic lifters. The 1.9 litre M43B19 and the M43TU followed in the late 1990s, and the engine stayed in the E46 until the N42 arrived in 2001.

1993: the M43B16 arrived with 1.6 L and 102 hp in the BMW E36 316i and BMW E46 316i.

1993: the M43B18 arrived with 1.8 L and 115 hp in the BMW E36 318i and BMW E34 518i. Compared with the M43B16, it added 13 hp.

1998: the M43B19 arrived with 1.9 L and 118 hp in the BMW E46 316i and BMW E46 318i. Compared with the M43B18, it added 3 hp.

Every M43 version explained

M43B16 (1.6 L, 102 hp)

M43B16: 1.6 L, inline-4, petrol, naturally aspirated. Output is 102 hp with 150 Nm of torque, and production ran from 1993 to 2002. That is about 64 hp and 94 Nm per litre, a relaxed tune aimed at torque, durability and economy. Within the M43 family, the M43B18 (115 hp) and M43B19 (118 hp) are more powerful. It was fitted to the BMW E36 316i and BMW E46 316i.

Reading the code: M marks an M-series code, the naming BMW used for its engine families up to the early 2000s; 43 is the family number; B stands for petrol (from the German Benzin); 16 is the capacity in decilitres, so 1.6 litres.

M43B18 (1.8 L, 115 hp)

M43B18: 1.8 L, inline-4, petrol, naturally aspirated. Output is 115 hp with 168 Nm of torque, and production ran from 1993 to 2001. That is about 64 hp and 93 Nm per litre, a relaxed tune aimed at torque, durability and economy. Within the M43 family, the M43B19 (118 hp) is more powerful, while the M43B16 (102 hp) is milder. It was fitted to the BMW E36 318i and BMW E34 518i.

Reading the code: M marks an M-series code, the naming BMW used for its engine families up to the early 2000s; 43 is the family number; B stands for petrol (from the German Benzin); 18 is the capacity in decilitres, so 1.8 litres.

M43B19 (1.9 L, 118 hp)

The M43B19 is a 1.9 L inline-4 petrol engine, naturally aspirated, rated at 118 hp and 180 Nm. BMW built it from 1998 to 2002. That is about 62 hp and 95 Nm per litre, a relaxed tune aimed at torque, durability and economy. Within the M43 family, it is the most powerful version, while the M43B16 (102 hp) and M43B18 (115 hp) are milder. It was fitted to the BMW E46 316i and BMW E46 318i.

Reading the code: M marks an M-series code, the naming BMW used for its engine families up to the early 2000s; 43 is the family number; B stands for petrol (from the German Benzin); 19 is the capacity in decilitres, so 1.9 litres.

Which cars use the M43

The M43 was fitted to 5 models. The list below is grouped by chassis generation so you can find your car quickly. Always confirm the exact code with your VIN, because BMW often used more than one engine in the same model.

BMW E36 third 3 Series (1990–2000)

In the third 3 Series, built 1990–2000 as a saloon, Touring, coupé, convertible, Compact, the M43 powered the 316i (M43B16, 102 hp) and 318i (M43B18, 115 hp).

For an E36, confirm the production date as well as the model: BMW often changed engine versions at the mid-life update. All E36 engines in stock.

The 316i uses the M43B16. BMW 316i engines for sale.

The 318i uses the M43B18. BMW 318i engines for sale.

BMW E46 fourth 3 Series (1997–2006)

In the fourth 3 Series, built 1997–2006 as a saloon, Touring, coupé, convertible, Compact, the M43 powered the 316i (M43B16, 102 hp), 316i (M43B19, 118 hp) and 318i (M43B19, 118 hp).

The quickest way to confirm the right M43 for your E46 is to send us the VIN; we check the engine code, the gearbox and the drive type. All E46 engines in stock.

The 316i uses the M43B16. BMW 316i engines for sale.

The 316i uses the M43B19. BMW 316i engines for sale.

The 318i uses the M43B19. BMW 318i engines for sale.

BMW E34 third 5 Series (1988–1996)

In the third 5 Series, built 1988–1996 as a saloon, Touring, the M43 powered the 518i (M43B18, 115 hp).

The quickest way to confirm the right M43 for your E34 is to send us the VIN; we check the engine code, the gearbox and the drive type. All E34 engines in stock.

Will an M43 fit my BMW? Model-by-model answers

Short answers for every model that left the factory with an M43, with prices from our current stock.

Will the M43B16 fit my BMW E36 316i?

Yes, the BMW E36 316i left the factory with the M43B16, so an M43B16 from another car is the direct replacement. The third 3 Series was built 1990–2000, and the M43B16 was produced 1993–2002, 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 E36 316i?

We do not have an M43B16 on the shelf for the E36 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.

Will the M43B16 fit my BMW E46 316i?

The M43B16 is the original engine for the BMW E46 316i, which makes it the straightforward choice. The fourth 3 Series was built 1997–2006, and the M43B16 was produced 1993–2002, 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 E46 316i?

We do not have an M43B16 on the shelf for the E46 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.

Will the M43B18 fit my BMW E34 518i?

For the BMW E34 518i, the M43B18 is the factory engine and the one to order. The third 5 Series was built 1988–1996, and the M43B18 was produced 1993–2001, 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 E34 518i?

We do not have an M43B18 on the shelf for the E34 518i 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 M43B19 fit my BMW E46 316i?

Yes, the BMW E46 316i left the factory with the M43B19, so an M43B19 from another car is the direct replacement. The fourth 3 Series was built 1997–2006, and the M43B19 was produced 1998–2002, 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 E46 316i?

We do not have an M43B19 on the shelf for the E46 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.

Will the M43B19 fit my BMW E46 318i?

For the BMW E46 318i, the M43B19 is the factory engine and the one to order. The fourth 3 Series was built 1997–2006, and the M43B19 was produced 1998–2002, 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 E46 318i?

We do not have an M43B19 on the shelf for the E46 318i 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.

M43 model-year guide

Use this year-by-year guide to see which M43 versions were in production when your car was built.

1993 — M43B16 and M43B18 were in production. New this year: M43B16 and M43B18.

1994 — M43B16 and M43B18 were in production.

1995 — M43B16 and M43B18 were in production.

1996 — M43B16 and M43B18 were in production.

1997 — M43B16 and M43B18 were in production.

1998 — M43B16, M43B18 and M43B19 were in production. New this year: M43B19.

1999 — M43B16, M43B18 and M43B19 were in production.

2000 — M43B16, M43B18 and M43B19 were in production.

2001 — M43B16, M43B18 and M43B19 were in production. Last year for M43B18.

2002 — M43B16 and M43B19 were in production. Last year for M43B16 and M43B19.

Common M43 problems and what to check

No engine is perfect. These are the faults our workshop sees most often on the M43, what causes them and how to check a used unit before you buy.

Timing chain guide rail

The M43's plastic guide rail can crack and break, which lets the chain slap and in the worst case jump. It is the single most important check on this engine.

How to check: Remove the valve cover and inspect the top of the guide; replace it when fitting any used M43.

Valve cover gasket leaks

The gasket hardens and oil seeps onto the exhaust manifold.

How to check: Look for burnt oil on the exhaust side.

Ticking hydraulic lifters

Lifters tick after a cold start on old oil.

How to check: Listen after the engine has warmed; noise that stays is a lifter problem.

Engine mounts and vibration

Four-cylinder vibration finishes engine mounts, making the car shake at idle.

How to check: Check mounts for split rubber when the engine is in the car.

Diagnosing a failing M43: symptoms and causes

If your current engine is showing one of these symptoms, this table helps you judge whether it can be repaired or whether a replacement M43 is the better route.

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.

Repair or replace your M43?

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 M43 are damaged, a used engine is usually cheaper and quicker than a rebuild.

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.

M43 maintenance and running costs

Replace the guide rail, tensioner and valve cover gasket before fitting a used M43. It is a small job with the engine out.

The single best thing you can do for an M43 is to change the oil more often than the longest factory interval. Clean oil protects bearings, chains, VANOS units and turbochargers, and costs far less than any of them.

Buying a used M43: the full checklist

Work through these points before you order a used M43, whoever you buy from.

1. 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.
2. 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.
3. 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.
4. 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.
5. 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.
6. 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.
7. 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.
8. 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.
9. 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.
10. 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.
11. 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.

M43 prices: what you should pay

We do not have an M43 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.

M43 engines in stock now

Fitting a replacement M43

These are the steps we recommend to every workshop fitting one of our M43 engines.

1. 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.
2. 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.
3. 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.
4. 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.
5. 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.
6. 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.
7. 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.
8. 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.
9. 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.
10. 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.
11. 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.

Tuning and upgrades

The M43 is an economy engine. Tuning gains are small; buyers wanting performance usually choose an M44 or a six-cylinder swap.

Whatever you plan, start with a healthy engine: a compression test, fresh fluids and the known weak parts replaced. Power upgrades amplify any existing problem.

M43 compared with similar BMW engines

Buyers often compare the M43 with these engines. Here is how they line up.

The N43 reaches higher outputs (up to 170 hp against 118 hp) and uses timing chain at the front. Its best-known faults are piezo injectors and ignition coils and spark plugs. Read the N43 guide.

The M10 reaches higher outputs (up to 125 hp against 118 hp) and uses single-row or duplex timing chain on the front of the engine; no scheduled change, inspect guides when the head is off. Its best-known faults are camshaft and rocker wear and timing chain guides and tensioner. Read the M10 guide.

The N42 and N46 reaches higher outputs (up to 173 hp against 118 hp) and uses timing chain at the front with balance shafts. Its best-known faults are oil consumption and timing chain stretch. Read the N42 and N46 guide.

Delivery, warranty and payment

Every M43 engine we sell is drained, sealed at each opening, strapped to a heat-treated pallet and shrink-wrapped before it leaves Hamburg. You receive photographs of the packed engine and a tracking number.

Door-to-door delivery is included to the address you give at checkout. Typical delivery takes three to five working days within Germany and neighbouring countries and five to ten working days to the rest of Europe and the UK.

A 12-month warranty covers eligible internal failure when the engine is fitted by a qualified workshop with new fluids and filters. You can pay by card, bank transfer or crypto and receive the invoice by email straight away.

We deliver M43 engines from Hamburg to customers across Europe and beyond. Typical door-to-door times and customs status:

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 buyers ask about the M43

Will the M43B18 engine fit my BMW E36 318i?

Yes, if your BMW E36 318i was built with the M43B18. BMW used this 1.8 liter (1,796 cc) petrol engine with 85 kW (115 HP) in the E36 318i from about 1993 to 2001.

Some E36 318i cars were built with a different engine: the M40B18 and M42B18. These look alike from the outside, so check the code on your engine or send us your VIN.

Also tell us if your E36 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 M43 Engines · Search M43B18 in the shop

How much is a replacement M43B18 engine for a BMW E36 318i?

A used M43B18 for the BMW E36 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 M43B18 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 M43 Engines · Search M43B18 in the shop

Will the M43B18 engine fit my BMW E46 318i?

Yes, if your BMW E46 318i was built with the M43B18. BMW used this 1.8 liter (1,796 cc) petrol engine with 85 kW (115 HP) in the E46 318i from about 1993 to 2001.

Some E46 318i cars were built with a different engine: the N46B20. These look alike from the outside, so check the code on your engine or send us your VIN.

Also tell us if your E46 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 M43 Engines · Search M43B18 in the shop

How much is a replacement M43B18 engine for a BMW E46 318i?

A used M43B18 for the BMW E46 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 M43B18 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 M43 Engines · Search M43B18 in the shop

Will the M43B18 engine fit my BMW E36 Compact 316i?

Yes, if your BMW E36 Compact 316i was built with the M43B18. BMW used this 1.8 liter (1,796 cc) petrol engine with 85 kW (115 HP) in the E36 Compact 316i from about 1993 to 2001.

In our records the M43B18 is the engine for the E36 Compact 316i, which makes the match simple. Still, check the code on your old engine or send us your VIN.

Also tell us if your E36 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 M43 Engines · Search M43B18 in the shop

How much is a replacement M43B18 engine for a BMW E36 Compact 316i?

A used M43B18 for the BMW E36 Compact 316i 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 M43B18 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 M43 Engines · Search M43B18 in the shop

What is the BMW M43B18 engine?

The BMW M43B18 is a 1.8 liter (1,796 cc) petrol engine from the M43 family. It has an inline 4, SOHC, 8 valve layout with no turbo (naturally aspirated), and makes 85 kW (115 HP) with 168 Nm of torque. BMW built it from 1993 to 2001 and it meets the Euro 2 emission standard.

You find the M43B18 in the BMW E36 318i, BMW E46 318i and BMW E36 Compact 316i. What we list: BMW M43 1.6 and 1.8 petrol engines for E36 and E46.

At Autowerke Engines every M43B18 is a real used engine from our yard in Hamburg. Before a unit is listed, the yard checks the engine code against the listing, writes down the parts fitted to it, seals every opening and photographs the real engine you will receive. Each listing shows the year, the mileage and the price, so you can compare units side by side.

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 M43 Engines · Search M43B18 in the shop

How much does a used BMW M43B18 engine cost?

A used BMW M43B18 engine in our yard usually costs between 800 € and 1.450 €. The exact price depends on the year, the mileage and the parts that come with the engine.

Our units show recorded mileage from about 22,000 km up to around 200,000 km. Lower mileage and more ancillaries mean a higher price. Each listing shows its own price, and the price you see is the price you pay. Prices include VAT for private buyers.

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 order a gearbox or a second engine on the same order, the fee is still charged once.

Inside the EU there is no import duty. For the UK and other non-EU countries, import duty and local VAT are paid by the receiver, and we supply a commercial invoice.

See all M43 Engines · Search M43B18 in the shop

Which cars use the BMW M43B18 engine?

BMW fitted the M43B18 to the BMW E36 318i, BMW E46 318i and BMW E36 Compact 316i. These cars were built with this engine from about 1993 to 2001.

The badge on the boot is not enough to be sure. The same model name can hide two different engines, for example after a facelift or a change in emission rules. Always read the engine code stamped on the block, or look it up with your VIN.

The M43B18 is the only M43 version we list, which makes it easy to pick, but the wiring and the engine computer still need to match your car.

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 M43 Engines · Search M43B18 in the shop

How much power and torque does the BMW M43B18 have?

From the factory the BMW M43B18 makes 85 kW (115 HP) and 168 Nm of torque. It is a 1.8 liter (1,796 cc) inline 4, SOHC, 8 valve petrol engine with no turbo (naturally aspirated).

Without a turbo, the power builds smoothly with the revs. A clean air intake, healthy ignition and the correct fuel are key to getting the full figure.

A used engine reaches its factory numbers when it is fitted with the matching engine computer and software, and serviced with the right oil and filters. If the engine computer from your car is a different version, a specialist may need to code it.

Every M43B18 on our site lists its year and mileage. Ask the desk for more pictures of any listing. We are happy to show the stamp, the ports and the ancillaries before you decide.

See all M43 Engines · Search M43B18 in the shop

How do I know a used M43B18 engine is in good shape?

Each engine in the yard is inspected in Hamburg. The code is matched to the listing, the parts on the engine are recorded, the openings are sealed and the real unit is photographed. An inspection certificate for the unit can travel with the order when you ask for it.

When you look at a listing, check the recorded mileage, the year and the photos of the ports and the stamp. Ask for photos of anything you want to see closer. You can ask for extra photos, a close-up of the code stamp or a short video before you order.

On a petrol engine like the M43B18, a careful fitter will also look at the spark plugs, the coils and the timing side before the engine goes in.

If the engine fails inside under normal use, the warranty covers you. 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.

See all M43 Engines · Search M43B18 in the shop

What comes with a used M43B18 engine?

Each M43B18 is sold as described on its own listing. The yard writes down the parts that are fitted to that unit, such as the turbo, the injectors, the manifolds or the alternator, so you know what arrives.

Some units are long engines with few ancillaries, others are more complete. If you need a part that is not listed, ask the desk. We often have the matching items in the yard.

Every engine is drained, sealed at each opening, strapped to a heat-treated pallet and shrink-wrapped, then photographed before it leaves the yard.

On delivery, the carrier brings the pallet to the kerb or a loading bay. Please have a forklift, a pallet truck or an engine crane ready.

See all M43 Engines · Search M43B18 in the shop

Is the BMW M43B18 a diesel or petrol engine?

The M43B18 is a petrol engine. It is a 1.8 liter (1,796 cc) inline 4, SOHC, 8 valve unit with no turbo (naturally aspirated), and it was built to the Euro 2 emission standard.

The emission standard matters for registration and for low-emission zones in many cities. When you replace an engine with the same code, the car keeps the same paperwork and the same emission class.

Petrol versions need the correct catalytic converters and oxygen sensors on the car to stay legal and to keep the engine computer happy. Reuse the parts from your car if they are in good condition.

If you are not sure which version you need, send us your VIN. We tell you the right code for free.

See all M43 Engines · Search M43B18 in the shop

Are there other versions of the BMW M43B18?

In our yard the M43B18 is the only listed version of the M43 family. It makes 85 kW (115 HP) and 168 Nm, and was built from 1993 to 2001.

Engines in one family share a basic block, but the turbo, the injection, the sensors and the engine computer can differ. A higher power version often has different pistons, a bigger turbo or a different fuel system.

This is why we ask for the exact code. Fitting a different version can work, but the wiring, the software and sometimes the gearbox must be changed to match.

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 M43 Engines · Search M43B18 in the shop

How long does delivery of an M43B18 engine take?

Orders confirmed before 14:00 CET on a working day leave Hamburg the same day. Later and weekend orders leave the next working day. Delivery to the Netherlands, Belgium, Germany, France, Luxembourg and Denmark takes 1 to 3 working days.

Spain, Italy, Portugal, Poland, Czechia, Austria, Ireland, the Nordics and the Baltics take 2 to 5 working days. Greek and Spanish islands, Malta, Cyprus and remote areas take 4 to 8 working days. The UK and other countries outside the EU are quoted one by one.

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. Every engine is drained, sealed at each opening, strapped to a heat-treated pallet and shrink-wrapped, then photographed before it leaves the yard.

You get a tracking number when the pallet is collected. Check the wrapping before you sign, and note any damage on the paperwork.

See all M43 Engines · Search M43B18 in the shop

What should I replace when I fit a used M43B18 engine?

A used engine lasts longest when it starts life in your car with fresh fluids and new seals. Fit a new oil filter and fresh oil of the grade BMW lists for this engine, and refill the coolant with the correct BMW antifreeze mix. Change the drive belt, the thermostat and the water pump seals if they look tired, because they are cheap while the engine is out. Use new gaskets for the exhaust manifold, the intake and the sump plug, and check every hose clip before the first start.

Look at the engine mounts and the clutch or the torque converter while the engine is out. Old mounts can crack a new engine's brackets, and a worn clutch is much easier to change now.

Before the first start, turn the engine over without fuel until the oil pressure light goes out. Then let it idle, check for leaks, and drive gently for the first few hundred kilometres.

The warranty asks for fitting by a qualified mechanic and the correct oil, coolant and filters. Keep your receipts in case you ever need to make a claim.

See all M43 Engines · Search M43B18 in the shop

Does a used M43B18 engine come with a warranty?

Yes. 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.

The warranty does not cover damage from wrong fitting, overheating, low oil, wrong fluids or fuel, engines that were opened or modified without our approval, or labour and towing costs.

To claim, send us your order number, a short description of the problem, photos or a video, and a mechanic's report if we ask for one. If the claim is approved, we repair, replace or refund the engine.

Keep the receipts for the fitting, the oil and the filters. They make any claim quick and simple.

See all M43 Engines · Search M43B18 in the shop

Can you check if an M43B18 fits my car with my VIN?

Yes, and it is free. Send the 17-character VIN of your car and, if you have it, the gearbox code. We check the engine family, the build year window and the parts your car needs.

For the M43B18, we confirm that your car was built with this code or with a version that can take it. BMW used it in the BMW E36 318i, BMW E46 318i and BMW E36 Compact 316i.

We only reserve an engine once the match is confirmed, so you never pay for the wrong unit. 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.

You can also use the VIN check on our site. It reads the year, the make, the model and the engine from the public vehicle register.

See all M43 Engines · Search M43B18 in the shop

What should I know about the BMW M43 engine?

BMW M43 1.6 and 1.8 petrol engines for E36 and E46. We list one version: M43B18 (1.8 liter (1,796 cc), 85 kW (115 HP), 1993 to 2001).

Because there is only one version, the code is easy to match. You still need the engine computer and wiring that suit your car.

The M43 family was used in chassis E36 and E46. The photos on each listing show the actual engine, not a stock picture. The yard checks the code, records what is bolted on, and seals the openings before the engine is offered.

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 M43 Engines

What should I check on a used BMW M43 engine?

Start with the basics: the engine code on the block, the recorded mileage and the photos. Make sure the code matches your car and the parts you need are on the unit.

On an M43 petrol engine, a fitter usually checks the spark plugs, the coils, the timing side and the oil seals. These parts are easy to check before fitting and easy to change if needed.

Ask the desk for more pictures of any listing. We are happy to show the stamp, the ports and the ancillaries before you decide. An inspection certificate can travel with the order on request.

Once fitted, change the oil and filter early and drive gently at first. Report any problem right away so the warranty stays valid.

See all M43 Engines · Inspection certificate

Which years were BMW M43 engines made?

BMW built the M43 engines we list from about 1993 to 2001. The M43B18 ran from 1993 to 2001.

They went into chassis E36 and E46. The exact year of a car matters, because BMW sometimes changed the engine version or its parts in the middle of a model's life.

Each listing in our yard names the engine year, so you can match it to the build date of your car.

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 M43 Engines

More answers from the Hamburg desk

These are further questions buyers ask us when choosing a replacement engine, answered by the people who check, pack and ship the engines.

Do you sell to workshops and trade customers?

Yes. Many of our customers are workshops, dealers and fleet owners.

Approved workshops and fleet operators can order on 30-day terms. Write to autowerkeengines@gmail.com with your company details to apply.

Trade customers get the same checks and photos on every engine, and a VAT invoice with every order.

Ask the desk about regular orders or sourcing a specific engine.

Is it safe to pay by card?

Yes. Card payments are handled by trusted payment providers with industry-standard encryption.

You never type your card number on our site. We email you a secure payment link after you place the order, and 3-D Secure applies.

Payment is taken when the order is confirmed.

We do not store any card details.

How do I find the engine code of my car?

The engine code is stamped on the engine block. On most BMW engines it sits on the side of the block, near the base of the cylinder head or by the oil filter housing.

It is also on many registration papers, and a dealer or a parts shop can read it from your VIN.

The easiest way is to send us your VIN. We read the engine code for you and tell you which engine fits.

Never order by the badge on the boot alone. The same model name can hide two different engines.

How do I pay with USDT or Bitcoin?

After you place the order, we email a wallet address and the amount in euro.

For USDT, the email also names the network. Send only on that network, or the payment may be lost.

The unit stays reserved until the transfer is confirmed on the network, then it is dispatched.

If anything is unclear, ask the desk before you send.

Who pays for return shipping?

If you change your mind, you pay the return shipping.

If we sent the wrong item or it arrived damaged, we cover the return.

Always contact us first. We arrange the pallet and the paperwork so the engine travels safely.

Returns are accepted within 14 days of delivery for unused items.

How long does engine delivery to Lithuania take?

Delivery from our Hamburg yard to Lithuania takes 2 to 5 working days after dispatch. Orders confirmed before 14:00 CET on a working day leave Hamburg the same day. Later and weekend orders leave the next working day.

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. Every engine is drained, sealed at each opening, strapped to a heat-treated pallet and shrink-wrapped, then photographed before it leaves the yard.

Lithuania is in the EU customs area for this shipment, so there is no import duty and no customs paperwork.

The carrier delivers to the kerb or a loading bay. Please have a forklift, a pallet truck or an engine crane ready, and check the wrapping before you sign.

How long does engine delivery to Cyprus take?

Delivery from our Hamburg yard to Cyprus takes 4 to 8 working days after dispatch. Orders confirmed before 14:00 CET on a working day leave Hamburg the same day. Later and weekend orders leave the next working day.

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. Every engine is drained, sealed at each opening, strapped to a heat-treated pallet and shrink-wrapped, then photographed before it leaves the yard.

Cyprus is in the EU customs area for this shipment, so there is no import duty and no customs paperwork.

The carrier delivers to the kerb or a loading bay. Please have a forklift, a pallet truck or an engine crane ready, and check the wrapping before you sign.

How does paying by bank transfer work?

SEPA bank transfer is available on request. After your order we send the bank details and the amount.

We hold the unit for five working days while the transfer clears, then dispatch it.

Please use your order number as the payment reference so we can match it quickly.

A VAT invoice is emailed when the engine is dispatched.

How long does engine delivery to Austria take?

Delivery from our Hamburg yard to Austria takes 2 to 5 working days after dispatch. Orders confirmed before 14:00 CET on a working day leave Hamburg the same day. Later and weekend orders leave the next working day.

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. Every engine is drained, sealed at each opening, strapped to a heat-treated pallet and shrink-wrapped, then photographed before it leaves the yard.

Austria is in the EU customs area for this shipment, so there is no import duty and no customs paperwork.

The carrier delivers to the kerb or a loading bay. Please have a forklift, a pallet truck or an engine crane ready, and check the wrapping before you sign.

How long does engine delivery to Portugal take?

Delivery from our Hamburg yard to Portugal takes 2 to 5 working days after dispatch. Orders confirmed before 14:00 CET on a working day leave Hamburg the same day. Later and weekend orders leave the next working day.

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. Every engine is drained, sealed at each opening, strapped to a heat-treated pallet and shrink-wrapped, then photographed before it leaves the yard.

Portugal is in the EU customs area for this shipment, so there is no import duty and no customs paperwork.

The carrier delivers to the kerb or a loading bay. Please have a forklift, a pallet truck or an engine crane ready, and check the wrapping before you sign.

Can I reserve an engine before I pay?

Yes. Once your order is placed, the unit is held for you while the payment comes in.

With a bank transfer, we hold the unit for five working days while the money clears. With USDT or Bitcoin, the unit stays reserved until the transfer is confirmed.

If you need more time, talk to the desk. We are flexible for workshops and repeat customers.

We only reserve an engine once we know it fits, so send your VIN first if you are not sure.

How long does engine delivery to Estonia take?

Delivery from our Hamburg yard to Estonia takes 2 to 5 working days after dispatch. Orders confirmed before 14:00 CET on a working day leave Hamburg the same day. Later and weekend orders leave the next working day.

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. Every engine is drained, sealed at each opening, strapped to a heat-treated pallet and shrink-wrapped, then photographed before it leaves the yard.

Estonia is in the EU customs area for this shipment, so there is no import duty and no customs paperwork.

The carrier delivers to the kerb or a loading bay. Please have a forklift, a pallet truck or an engine crane ready, and check the wrapping before you sign.

How long does engine delivery to Sweden take?

Delivery from our Hamburg yard to Sweden takes 2 to 5 working days after dispatch. Orders confirmed before 14:00 CET on a working day leave Hamburg the same day. Later and weekend orders leave the next working day.

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. Every engine is drained, sealed at each opening, strapped to a heat-treated pallet and shrink-wrapped, then photographed before it leaves the yard.

Sweden is in the EU customs area for this shipment, so there is no import duty and no customs paperwork.

The carrier delivers to the kerb or a loading bay. Please have a forklift, a pallet truck or an engine crane ready, and check the wrapping before you sign.

Do I need to code the engine computer after a swap?

If you reuse the engine computer from your car, and the new engine has the same code, little or no coding is usually needed.

If the engine is a different version, or the engine computer comes with the engine, a specialist may need to code it to your car's immobiliser and options.

Ask us before you order. We tell you if the unit needs coding for your car.

Your VIN helps us give the right answer.

Are the photos on each listing of the real engine?

Yes. The photos show the real unit in our Hamburg yard, not a catalogue picture.

Before an engine is listed we check the code, write down the parts on it and seal the openings. The photos are taken at the same time.

If you want to see more, ask the desk for extra photos or a short video. We send them before you pay.

An inspection certificate can also travel with the engine on request.

What is the inspection certificate?

The inspection certificate is a sheet that records the unit that leaves our yard.

It notes that the engine or gearbox code was checked against the listing, that the parts were recorded as fitted, that the openings were sealed, and that the unit was photographed and packed with a tracking number.

You can ask for the certificate on any unit in the yard. It is sent with the order confirmation.

Many buyers keep it with the car's service papers.

How do I contact Autowerke Engines?

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.

You can also use the contact form on our site. We reply during working hours.

For a fast answer about fitment, include your VIN and the engine code in your first message.

Our yard and office are at Andreas Meyer Straße 38, 22113 Hamburg, Germany.

What if my engine arrives damaged?

Check the pallet before you sign. If the wrapping is damaged, note it on the paperwork and take photos.

Contact us within 48 hours of delivery with your order number and clear photos of the product and the packing.

If you got the wrong item or it arrived damaged, we pay the return shipping and put it right.

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.

What should I do before the first start?

Fit a new oil filter, fill with the correct oil and refill the coolant. On turbo engines, fill the turbo oil feed with clean oil.

Turn the engine over without fuel or ignition until the oil pressure light goes out. This brings oil to every bearing before the engine runs.

Check all hoses, clips and electrical plugs, then start the engine and let it idle while you look for leaks.

Bleed the cooling system and top up as the air comes out.

How long is the engine warranty?

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.

The engine must be fitted by a qualified mechanic or workshop, with the correct oil, coolant, filters and service parts.

Report any problem to us right away, and do not open or repair the engine without our written approval.

If a claim is approved, we repair, replace or refund the engine.

How long does engine delivery to Finland take?

Delivery from our Hamburg yard to Finland takes 2 to 5 working days after dispatch. Orders confirmed before 14:00 CET on a working day leave Hamburg the same day. Later and weekend orders leave the next working day.

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. Every engine is drained, sealed at each opening, strapped to a heat-treated pallet and shrink-wrapped, then photographed before it leaves the yard.

Finland is in the EU customs area for this shipment, so there is no import duty and no customs paperwork.

The carrier delivers to the kerb or a loading bay. Please have a forklift, a pallet truck or an engine crane ready, and check the wrapping before you sign.

What do I need when the engine is delivered?

Carriers deliver to the kerb or a loading bay. Please have a forklift, a pallet truck or an engine crane ready.

An engine on its pallet is heavy, so do not try to lift it by hand.

Before you sign, check the wrapping. If it is damaged, write it on the paperwork, take photos and contact us the same day.

Delivering to a workshop is often easiest, because they have the lifting tools.

How long does engine delivery to Spain take?

Delivery from our Hamburg yard to Spain takes 2 to 5 working days after dispatch. Orders confirmed before 14:00 CET on a working day leave Hamburg the same day. Later and weekend orders leave the next working day.

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. Every engine is drained, sealed at each opening, strapped to a heat-treated pallet and shrink-wrapped, then photographed before it leaves the yard.

Spain is in the EU customs area for this shipment, so there is no import duty and no customs paperwork.

The carrier delivers to the kerb or a loading bay. Please have a forklift, a pallet truck or an engine crane ready, and check the wrapping before you sign.

How long does engine delivery to the Netherlands take?

Delivery from our Hamburg yard to the Netherlands takes 1 to 3 working days after dispatch. Orders confirmed before 14:00 CET on a working day leave Hamburg the same day. Later and weekend orders leave the next working day.

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. Every engine is drained, sealed at each opening, strapped to a heat-treated pallet and shrink-wrapped, then photographed before it leaves the yard.

The Netherlands is in the EU customs area for this shipment, so there is no import duty and no customs paperwork.

The carrier delivers to the kerb or a loading bay. Please have a forklift, a pallet truck or an engine crane ready, and check the wrapping before you sign.

How do I make a warranty claim?

Contact the desk with your order number, a short description of the problem, and photos or a video.

We may ask for a mechanic's inspection report.

If the claim is approved, we repair, replace or refund the engine.

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.

Glossary

• 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.
• Timing chain tensioner — A hydraulic or spring device that keeps the timing chain tight. Worn tensioners cause cold-start rattle.
• TU — Technical Update, BMW's suffix for a revised version of an engine.

Our verdict

The M43 rewards owners who understand it. Check the code against your VIN, ask for compression figures and photographs, replace the known weak parts while the engine is out, and fit it with fresh fluids and filters. Do that and a used M43 will give years of service.

Ready to order, or need help choosing? Browse every M43 in stock, contact the Hamburg desk or send us your VIN on WhatsApp.

Guides to each M43 version

• BMW M43B16 engine: specs, problems and prices
• BMW M43B18 engine: specs, problems and prices
• BMW M43B19 engine: specs, problems and prices