Second Hand BMW 8 Series EGR Valve

Yes, certain BMW 8 Series variants do have an EGR (exhaust gas recirculation) valve — specifically the diesel-engined models, including those fitted with the B57 six-cylinder diesel engine found in the 840d and M840d xDrive. Petrol-engined 8 Series variants (such as the 840i and M8 with their B58 and S63 units) do not use an EGR valve as part of their emissions system, so if you have a petrol model you are looking for the wrong part. If you are unsure which engine your car has, check the V5C or ask your breaker to search by registration.

The current-generation 8 Series (G14/G15/G16) launched in 2018 and runs through to the present without a significant mechanical generation change, so on paper diesel variants share the same B57 engine family across that span. However, emissions calibration and software can differ between earlier Euro 6b and later Euro 6d-compliant versions of the same engine, which may affect whether the valve behaves correctly or passes MOT. Confirm the exact engine code and emissions suffix with your breaker against your registration before purchasing.

No — on the 8 Series, M Sport is a cosmetic and chassis trim pack rather than a different engine variant, so an M Sport 840d and a standard 840d share the same diesel engine and the same EGR valve. What matters is the engine code (B57 and its suffix) and the emissions standard the car was built to, not the trim designation. Your breaker will match the part to your registration and engine code rather than the trim name.

The B57 diesel engine is used across several BMW model lines including the 540d and 740d, and in some cases the EGR valve itself may be the same component — but routing, bracket positions and ancillary pipe connections can differ depending on how the engine is mounted in a particular bodyshell. This is strong confirm-with-breaker territory; give your breaker the part number from your old valve and your registration so they can verify the unit they have is a direct match rather than just engine-family compatible.

Yes, the G-generation 8 Series launched in 2018 (the G15 coupe arrived first, with the G14 convertible and G16 Gran Coupe following in 2019), so a 2018 car is an early build from the start of this generation. Early production examples may sit on a slightly different Euro 6 sub-standard than later cars, which can affect emissions-related components including the EGR valve. Always have your breaker check the build date and engine suffix against your registration to be sure the used valve matches your car's calibration.

Give them your full registration number, the engine code (found on the V5C or on a sticker under the bonnet — look for B57 followed by a letter suffix), and ideally the part number stamped on your existing valve if it is still accessible. The emissions standard (Euro 6b or 6d) is also worth mentioning as it can determine software and valve specification. The more information you provide, the better the chance of getting a valve that fits and functions correctly without needing expensive recoding.