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BMW 1 Series Engines

Model Name Engine code Year Engine size Chassis Fuel KW HP Cylinders Valves
1 (F40) M 135 i xDrive B48 A20 E 2019-2025 1998cc 1 Petrol 1951 2251 41 161
1 (F20) 125 d B47 D20 B 2011-2016 2.0 F201 Diesel 851 1701 41 161
1 (F20) 125 d N47 D20 D 2011-2016 2.0 F201 Diesel 1501 1601 41 161
1 Coupe (E82) 135 i N55 B30 A 2007-2014 3.0 E821 Petrol 2001 2721 61 241
1 Coupe (E82) 135 i N54 B30 A 2007-2014 3.0 E821 Petrol 2001 2641 61 241
1 (E87) 130 i N52 B30 A 2005-2012 3.0 E871 Petrol 1551 2001 61 241
1 (E87) 130 i N52 B30 AF 2005-2012 3.0 E871 Petrol 1791 2001 61 241
1 (E87) 130 i N52 B30 B 2005-2012 3.0 E871 Petrol 1601 2001 61 241
1 (E87) 130 i N52 B30 BF 2005-2012 3.0 E871 Petrol 1601 2001 61 241

BMW 1 Series Specialists for Engine Replacements and Rebuilds

Sooner or later, your BMW 1 Series is bound to develop an engine fault and choosing the right solution for your car is based on your ownership plans and your peace of mind. At BM Engine Works, we have been supplying and fitting BMW engines for over 25 years for owners, specialists and garages across the UK. We concentrate exclusively on the BMW engines instead of generic brands, and every BMW 1 Series engine is assessed on its own merits.

Our team of technicians’ source low mileage used BMW 1 Series engines from mileage verified donor vehicles and puts them through thorough testing before presenting them for supply. Every used and reconditioned BMW 1 Series is acquired with a clear focus on longevity, compatibility and real world reliability to help you move forward knowing the engine solution you choose is genuinely right for your BMW.

BMW 1 Series Engine Options We Work With

The BMW 1 Series has been through multiple generations and has used a wide range of petrol and diesel engines. Our technicians work with those engines on a daily basis. As far as the petrol engines are concerned, the N43, N45 and N46 engines found in earlier E81–E88 models, the turbocharged N13 used in later E-generation cars, and the newer B-series units, such as the B38 three-cylinder and B48 four-cylinder engines used across F20 and F40 models, are dealt with by our technicians with absolute ease.

For diesel variants, we regularly supply and rebuild both the N47 engines fitted to earlier 1 Series cars and the later B47 units introduced for improved efficiency and emissions compliance. Where applicable, we also support newer mild hybrid assisted petrol variants found in recent generations. We understand that each engine family has its own characteristics, known weaknesses, and depending on mileage and ownership goals. This is why we identify the exact unit before recommending a used, reconditioned, or rebuilt solution.

What Faults Do We See Most Often with the BMW 1 Series?

It has been over 25 years since we have been diagnosing and working on hundreds of BMW 1 Series engines and we see clear patterns emerging in the types of engine problems that occur most often. Timing chain and timing component wear are the most prevalent issues on certain petrol and diesel engines, particularly as mileage increases and oil change intervals are stretched. Another issue that those machines suffer from is oil consumption and persistent leaks that mostly develop gradually before owners notice performance changes or warning lights.

Turbocharged variants frequently encounter boost related faults and turbo wear; the culprit is usually the oil starvation or carbon contamination. Diesel 1 Series variants also present EGR and DPF issues, but these can be solved easily. On petrol engines, carbon build-up on intake valves is a familiar problem that can lead to rough running and reduced efficiency. These are not theoretical issues; they’re real-world faults we identify through hands-on inspection and testing before recommending any engine repair, rebuild, or replacement.

How to Choose the Right Engine and Our Engine Sourcing Process

You have a choice to make between a used, reconditioned or rebuilt BMW 1 Series engine, and it depends entirely on how you use your car and what you expect from it long term. For those with a limited budget, a used BMW 1 Series engine makes sense with a verified low mileage unit from a suitable donor vehicle. For those planning to use their vehicle long term, a reconditioned engine is a smarter option. If the original engine block is intact and failure is localized such as bearing damage or valve train issues, a rebuild may be the right option, especially for those who want to retain the car’s original matching engine.

Every engine we offer carries a strict sourcing and approval process, and used BMW 1 Series engines are selected only from appropriate donor vehicles, with mileage verified through multiple data points and physical inspection. We put every engine through BMW specific mechanical checks and diagnostic testing before it is approved for supply, and many engines are rejected outright if they don’t meet our standards. We ensure that the engine provided by us results in better reliability, consistency and long term outcomes for BMW 1 Series owners.

Choose BM Engine Works for Experience and Clear Pricing

25 years of hands on engine swap experience of BMW 1 Series have shaped our approach towards reliability and performance. We perform detailed diagnostics to confirm if engine swap is the only appropriate solution, factoring in coding, adaptation and software compatibility from the outset. Due to our experience, we are familiar with the common 1 series fitting pitfalls, such as ECU integration issues and avoid them before they become problems. This fitting expertise acts as a quality filter, ensuring that even engine-only buyers receive a unit that is genuinely fit for purpose.

We tend to keep pricing transparent and straightforward. Typically used BMW 1 Series engines start from £1,250 and reconditioned engines start from £2,450. However, the final price is determined by the exact engine code, model year, fuel type, specifications, and level of warranty selected. We also offer secure UK-wide delivery, professional fitting at our workshop, and full support for customers using a third-party installer, including post-installation checks and validation to ensure the engine performs exactly as expected. Requesting a free obligation quote is easy; all you have to do is provide the registration number of your vehicle, and we will take it from there.

Frequently Asked Questions

BMW 1 Series engine cost changes with the model year and the type of engine you choose, like petrol or diesel, a reconditioned engine or a used one. Enter your vehicle registration number to get the amazing prices in seconds now.
In the BMW 1 Series, diesel engines like N47D20A can fit in 118d or petrol like N13B16A will fit in 116i. Always match your vehicle chassis, such as E87 or F20, to get the right engine code.
Many BMW 1 Series engines run over 200,000 plus miles if they are regularly changed, the engine oil and cared for. Our reconditioned engines are like brand-new engines that come with an extensive warranty.
Constant engine repair can be expensive compared to reconditioning or complete engine replacement. Always consult with the BMW specialists for the engine service consultation.
Many owners reported constant timing chain issues with the BMW 1 Series engines, especially the N47 engines. Catch ratting early to stop valve damage and keep running smoothly.
Rebuilding the BMW 1 Series engine keeps the original mileage on the odometer. In the reconditioning process, all the worn-out parts are replaced with the OEM parts, but it does not change the car's distance record.

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