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BM Engine Works
4.6
(283)
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4.6
(283) reviews
samuil rusu
2 weeks ago
Abz R
2 weeks ago
I purchased a engine for my bmw the service was very efficient smooth process and delivered on time highly recommended company for all you’re bmw engi...Read more
MR HOQUE
2 weeks ago
Excellent guy
Good team
Very polite
Made to feel like your at home
Irbaz Ahmed
3 weeks ago
Very good service and fast, once on the ramp vehicle done within a week, highly recommend very good people and very honest. Top people
Louie Port
3 weeks ago
Had my car engine changed by these guys, they changed the engine, the turbo and the clutch
Sonuc Saltunc
4 weeks ago
Dropped my Range Rover to BM works, car is spot on, good customer service and turnaround
Myles Croxford
1 month ago
Great service and communication from Leon. Definitely recommended!
Glen Allan
1 month ago
Easy and honest garage. Can’t complain
Zac H
1 month ago
Absolutely outstanding service from BM Engine Works.
These guys really know what they're doing. From start to finish, the service was professional, h...Read more
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BMW Engine Codes: Find the Correct Replacement Engine
You can use the BMW engine code to be sure about the compatibility of the used, rebuilt or reconditionedreplacement engine. All you have to do is enter your registration or provide the VIN and full engine code. BM Engine Works will check the engine family, variant, build specification and available replacement options.
The model badge alone is not enough to confirm compatibility. A BMW 320d, 520d, X3 or X5 can use different engines depending on its production date, power output, emissions equipment, gearbox and drivetrain. We verify these details before confirming an engine for supply or fitting.
Popular BMW Diesel Engine Codes We Deal with
The table covers common BMW diesel engine families found in UK vehicles. The models are representative examples only. Always confirm the complete code, suffix and vehicle specification before ordering.
Engine family
Capacity and layout
Example BMW applications
Replacement matching notes
M47
2.0-litre four-cylinder diesel
118d, 120d, 318d, 320d, early 520d and X3 2.0d
Several M47 and M47TU versions exist. Check the build date, ancillaries, electronics and full stamped code.
M57
2.5 or 3.0-litre six-cylinder diesel
325d, 330d, 525d, 530d, 535d, 730d, X3, X5 and X6
Turbo arrangement, output and emissions equipment vary between M57 versions. The family name alone does not confirm fitment.
Single, multi-turbo and performance variants are not direct substitutes. Check the full B57D30 code, drivetrain and emissions equipment.
Popular BMW petrol and M engine codes
We have been replacing petrol engines for over 30 years and know better than anyone that BMW petrol engines also use several generations and variants under the same broad family name. Hybrid and M applications require additional checks because their cooling, electrical, control and drivetrain systems may differ from standard models.
Engine family
Capacity and layout
Example BMW applications
Replacement matching notes
N42 / N46
1.8 or 2.0-litre four-cylinder petrol
118i, 120i, 316i, 318i, 320i and selected X1 and X3 models
N42 and N46 engines are related but should not be treated as direct substitutes. Check the complete code, electronics and ancillary layout.
N43
1.6 or 2.0-litre four-cylinder petrol
116i, 118i, 120i, 316i, 318i, 320i and 520i
Output and injection-system differences make the VIN, build date and full engine code important.
N13
1.6-litre turbocharged four-cylinder petrol
114i, 116i, 118i and 316i
Confirm output, electronic controls, turbo equipment and the exact N13B16 variant.
M5, M6, M8, X5 M, X6 M, BMW XM, newer M5 and selected M Performance V8 models
Generation, hybrid system, cooling, drivetrain and control electronics differ substantially. A family-code match is not sufficient.
Why BMW Engine Codes Matter So Much?
Engine compatibility is paramount when replacing an engine, and a BMW engine code helps you identify the engine family and its technical configuration. short family name such as N47, N57, B47 or B58 is useful for general identification, but it is not enough to order a replacement engine.
The complete designation may identify the fuel type, capacity, performance level and technical revision. For example, N57D30 identifies an N57-family diesel with a nominal 3.0-litre capacity, while the remaining letters or numbers distinguish a particular version. BMW documentation may also use a more detailed internal designation than the shortened code commonly used in adverts.
Spacing and formatting vary between databases. N47D20C and N47 D20 C may refer to the same written designation, but a similar-looking suffix can still represent a different engine specification.
What is the best way to find the code for your BMW
The safest starting point is your registration number or 17-character VIN. This identifies the vehicle's original build specification and helps narrow down the engine fitted when it left the factory.
You can also find an identification marking on the engine itself. Its position varies by engine family and installation, and it may be difficult to see without removing a cover or inspecting the block from a particular angle. A diagnostic scan, BMW parts information and the vehicle's repair history can provide further confirmation. Do not rely only on the badge on the boot. Two vehicles sold as a 320d, 520d or X5 30d can use different engine variants.
How BM Engine Works matches a replacement engine
Our 3 decades of experience have enabled us to develop an excellent identification process that helps us identify the exact replacement engine before we reserve or install it. Here is how our process works.
We identify the BMW from its registration or VIN.
We confirm the original engine family and complete code.
We check the production date, capacity, output, emissions standard, gearbox and drivetrain.
We compare the replacement unit, assembly level and included ancillaries.
We assess the reported fault and any supporting-system risks.
We provide the available used, rebuilt or reconditioned options in a written quotation.
For supply-and-fit work, we install, commission and test the engine at our workshop.
Frequently Asked Questions
Your engine code is the factory designation for the engine family and variant fitted to the vehicle. Provide the registration or VIN so the original specification can be checked, and confirm the marking on the engine if it may have been replaced before.
Yes. The same model badge can cover different engine generations, outputs and emissions specifications. Production date, market, gearbox and drivetrain can also change the required unit.
Do not assume they are interchangeable. They belong to the N47D20 family, but their application, power output, ancillaries and electronic requirements can differ. The VIN and complete engine specification must be checked.
Normally, no. B47 and N47 engines use different technical generations, electronics and emissions systems. A normal replacement should match the vehicle's correct engine specification rather than rely on a newer family name.
The VIN identifies the vehicle's original build specification and is one of the best matching tools. If the engine has previously been changed, the marking on the installed unit and the repair history should also be checked.
No. The engine code identifies the design or variant, while the engine number is a unique production identifier for an individual unit. Both can be useful during identification.
Many plug-in hybrids use a combustion engine from a familiar family such as B38, B48 or B58, but the hybrid installation has additional electrical, cooling and control requirements. Compatibility must be checked against the complete VIN and hybrid specification.
Yes. Send the registration or VIN, model, year, fuel type and details of the fault. BM Engine Works can identify the likely engine specification and request a photograph or further information if needed.
Yes. Supply-only BMW engines can be delivered across the UK, subject to availability and delivery terms. The exact assembly level, ancillaries, installation requirements and warranty conditions will be confirmed before purchase.
Yes. Complete supply-and-fit services are carried out at our workshop. Vehicle recovery can also be arranged where required. The quotation will confirm the engine, agreed work, expected turnaround and warranty terms.
Enter your registration or send the VIN, full engine code, current mileage, fault details and postcode. BM Engine Works will check compatibility and explain the available used, rebuilt, reconditioned or original-engine rebuild options.
