BMW 740d (G11) engine: which one, problems and replacement

The BMW 740d in the sixth 7 Series generation (G11, built 2015–2022) was built with 2 different engines over its life: the B57D30T (320 hp, 2016–2020) and the B57D30B (340 hp, 2017–2026).

Below you will find how to identify the engine in your 740d, the faults to look for, current prices for a replacement and the swap options that make sense.

• Generation: sixth 7 Series, 2015–2022
• Body styles: G11 (saloon)
• Engines: B57D30T, B57D30B
• Output: 320 hp and 340 hp
• Replacement engines in stock: 258 from 753,00 €

Which engine is in your 740d?

B57D30T in the 740d

The B57D30T was used in the G11 740d, built 2016–2020. It is a 3.0 L twin-turbo diesel inline-6 with 320 hp and 680 Nm. Compared with the B57D30B (340 hp), it is the mildest.

Reading the code: B marks a B-series code, BMW's modular engine family introduced from 2013 with 500 cc per cylinder; 57 is the family number; D stands for diesel, longitudinal installation for rear-drive and xDrive cars; 30 is the capacity in decilitres, so 3.0 litres; T identifies the version or output stage.

B57D30B in the 740d

The B57D30B was used in the G11 740d, built 2017–2026. It is a 3.0 L turbocharged diesel inline-6 with 340 hp and 700 Nm. Compared with the B57D30T (320 hp), it is the strongest.

Reading the code: B marks a B-series code, BMW's modular engine family introduced from 2013 with 500 cc per cylinder; 57 is the family number; D stands for diesel, longitudinal installation for rear-drive and xDrive cars; 30 is the capacity in decilitres, so 3.0 litres; B identifies the version or output stage.

740d engines by model year

The engine changed 2 times during the G11 run, in 2017 and 2021. Changes usually come with BMW's mid-life update (LCI) or a new emissions standard, so a car registered early in a year can still have the older engine. The VIN settles it.

Other cars with the same engine as the 740d

A replacement engine does not have to come from another 740d. These models left the factory with the same engine code, so a unit from any of them is a candidate donor once the sump, mounts and ancillaries are matched to your car.

B57D30T: BMW G30 540d, BMW G05 X5 40d.

B57D30B: BMW G30 540d, BMW G05 X5 40d.

How to confirm your engine code

Because the 740d used more than one engine, the badge alone does not tell you which one your car has. The build date is the first clue; the VIN is the proof. Send us the last seven characters of the VIN and we read the engine code from BMW's records, or look for the code stamped on the block. How to find your BMW engine code.

Known 740d engine problems

The B57D30T and B57D30B in the 740d share the known weak points of the B57 family. Full B57 guide.

EGR cooler. BMW recalled some cars to replace the EGR cooler.

Diesel particulate filter. The DPF clogs on short-trip cars.

Turbo actuators. Turbo actuators stick on multi-turbo versions.

Symptoms to watch for on the 740d

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.

Rattle or whine from the gearbox end. On engines with the timing chain at the rear, a rattle or whine from the back of the engine is the warning sign of chain stretch or guide wear.

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.

Particulate filter warning. Short trips stop the DPF from regenerating. A long motorway run often clears it; a filter that keeps blocking may be covering an injector, EGR or turbo problem.

Looking after the 740d engine

• Oil: 0W-30 or 5W-30 BMW Longlife-04, about 6.5 litres.
• Service interval: Oil every 15,000 km or yearly.
• Timing drive: Timing chain at the rear (gearbox end).
• Workshop notes: Check the version (B57D30A, B, C or S) before ordering.

Buying a used engine for the 740d: checklist

1. 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.
2. 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.
3. 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.
4. 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.
5. 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.
6. 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.
7. 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.
8. Particulate filter and EGR history. Short-trip diesels clog their DPF and EGR systems. The engine may be fine, but ask whether the donor car had DPF warnings, and plan to clean or check your own filter before fitting.
9. 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.
10. Gearbox-end timing chain. On this engine the timing chain sits at the gearbox end, so replacing it normally means removing the engine. If the chain has not been replaced, the time to do it is before the engine goes into your car.

BMW 740d replacement engine cost

Our 740d engine stock runs to 258 units, priced from 753,00 € to 7.569,00 € with a median of 5.426,00 €.

Prices depend on the exact version, the donor's mileage, how complete the engine is and the demand for that code. Higher-output versions, low mileage and dressed engines with turbo, injectors and ancillaries cost more; long blocks and higher mileage cost less.

740d engine prices by model year

Engines from 2010–2014 have a median of 2.945,00 €, while units from 2020–2024 sit at 5.435,00 €. Newer engines usually cost more because they come from younger donor cars with lower mileage and later updates.

740d engine prices by mileage

Mileage matters less than history on a well-maintained BMW engine, but it is a useful guide. A low-mileage unit from a younger car gives you more life for a modest premium.

11 of these come from G11 donor cars, priced from 753,00 € to 7.569,00 €. An engine from the same body is the most direct swap because the sump, mounts and ancillaries already match.

On top of the engine, budget for the workshop's labour and the parts that are best replaced while the engine is out: engine mounts, the rear main seal, cooling parts, a clutch or converter seal, fluids and filters.

Replacement engines in stock for the 740d

Here is a selection of 740d engines currently on our shelves, photographed in the yard. Click any of them for the full photographs, mileage and specification.

BMW G11 740d B57D30B Engine 20184.873,00 €BMW G11 740d B57D30T Engine, Premium Grade7.569,00 €BMW 740d G11 B57D30B Engine 2021753,00 €BMW 740d G11 B57D30B Engine 2021 · 71200mi3.429,00 €B57D30B Engine For Sale BMW 740d G114.917,00 €BMW 740d G11 B57D30B Engine 2017 · 136,000 km2.786,00 €BMW G11 740d B57D30B Complete Engine3.273,00 €

BMW G11 740d B57D30B Engine 2018 — 4.873,00 €, reduced from 5.500,00 €. It comes from a 2018 donor car, and 25 units are available. Ask the desk for compression figures or extra photographs before you order.

BMW G11 740d B57D30T Engine, Premium Grade — 7.569,00 €, reduced from 8.080,00 €. It comes from a recorded donor car, and 9 units are available. Ask the desk for compression figures or extra photographs before you order.

BMW 740d G11 B57D30B Engine 2021 — 753,00 €, reduced from 1.350,00 €. It comes from a 2021 donor car, and 11 units are available. We can confirm fitment against your VIN the same day.

BMW 740d G11 B57D30B Engine 2021 · 71200mi — 3.429,00 €, reduced from 3.650,00 €. It comes from a 2021 donor car, and 16 units are available. We can confirm fitment against your VIN the same day.

B57D30B Engine For Sale BMW 740d G11 — 4.917,00 €, reduced from 5.250,00 €. It comes from a recorded donor car, and 28 units are available. Ask the desk for compression figures or extra photographs before you order.

BMW 740d G11 B57D30B Engine 2017 · 136,000 km — 2.786,00 €, reduced from 3.350,00 €. It comes from a 2017 donor car with 136,000 km, and 23 units are available. Ask the desk for compression figures or extra photographs before you order.

BMW G11 740d B57D30B Complete Engine — 3.273,00 €, reduced from 3.800,00 €. It comes from a recorded donor car, and 21 units are available. The listing shows every side of the engine and the fitted parts.

Will it fit my 740d?

Will the B57D30T fit my BMW G11 740d?

Yes, the BMW G11 740d left the factory with the B57D30T, so a B57D30T from another car is the direct replacement. The sixth 7 Series was built 2015–2022, and the B57D30T was produced 2016–2020, 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 G11 740d?

We have 1 B57D30T engine from G11 donor cars, priced from 7.569,00 €. Delivery to your door is included, and the engine carries a 12-month warranty when fitted by a qualified workshop. Add fitting labour and the parts you replace at the same time — seals, cooling parts and mounts — to estimate the total.

Engine swaps and upgrades for the 740d

These engines were fitted to other versions of the G11 at the factory, which makes them the most practical upgrades: the body was designed around them and many parts are shared.

Can I fit the B57D30S in my 740d?

Yes, it is one of the more common upgrades. Both are diesel inline-6 engines, so the mounting points are similar, but the B57D30S needs its own wiring and engine control unit, the matching gearbox or clutch, and often a different sump, cooling and exhaust. The gain is 60 hp and 60 Nm. In Germany and most of Europe an engine swap must be inspected and registered.

Can I fit the N63B44T2 in my 740d?

It is a full conversion: the N63B44T2 runs on petrol and the B57D30B on diesel, so the fuel system, wiring, engine control unit, instrument coding and usually the gearbox change too. The gain is 110 hp and 0 Nm. In Germany and most of Europe an engine swap must be inspected and registered.

Can I fit the N63B44T3 in my 740d?

It is a full conversion: the N63B44T3 runs on petrol and the B57D30B on diesel, so the fuel system, wiring, engine control unit, instrument coding and usually the gearbox change too. The gain is 122 hp and 0 Nm. In Germany and most of Europe an engine swap must be inspected and registered.

Fitting a replacement engine in the 740d

1. 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.
2. Replace the rear timing chain if in doubt. On engines with the chain at the gearbox end, chain work needs the engine out. If the history is unknown, replace the chain, guides and tensioner before fitting.
3. 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.
4. 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.
5. Check the particulate filter. If the old engine failed with oil or coolant entering the exhaust, the DPF may be contaminated. Check its back-pressure before relying on it.
6. 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.
7. 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.
8. 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.
9. 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.

The full fitting and first-start procedure.

740d engine questions

Will the B57D30B engine fit my BMW G15 840d?

Yes, if your BMW G15 840d was built with the B57D30B. BMW used this 3.0 liter (2,993 cc) diesel engine with 250 kW (340 HP) in the G15 840d from about 2016 to 2024.

In our records the B57D30B is the engine for the G15 840d, which makes the match simple. Still, check the code on your old engine or send us your VIN.

Also tell us if your G15 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 B57 Engines · Search B57D30B in the shop

Delivery, warranty and payment

Every 740d 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.

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.

All G11 engines · B57 engine guide · BMW 740d engines for sale · Send us your VIN