Used BMW 8 Series Throttle Body

It depends entirely on the engine. Modern turbocharged petrol engines in the G15 8 Series (2018-onwards), such as the M850i's 4.4-litre V8 and the 840i's 3.0-litre straight-six, do use an electronic throttle body to regulate airflow, so the part does exist on these variants. The diesel engines (840d) also use a throttle body, though its design and function differ slightly from the petrol units. If you are unsure whether your specific engine has one, confirm with your engine code before requesting quotes.

The G15 8 Series runs from 2018 to the present, but BMW made mid-cycle updates including a facelift in 2022, and ancillary components like mounting brackets and sensor connectors can change during a production run even when the engine code stays the same. Your engine code — found on your V5 or via a VIN check — is the most reliable starting point, and both years share the same generation, which is a good sign. However, whether a throttle body from a 2019 car crosses the 2022 facelift boundary without issue is something you should confirm with the breaker against your exact registration before buying.

No, trim level does not affect throttle body fitment on the 8 Series. M Sport, Sport, and base trims on the same engine are mechanically identical in this respect — the throttle body follows the engine code, not the badge or trim pack. What you might notice is cosmetic differences in surrounding engine-bay plastics or covers, but the throttle body itself is the same part. Focus on matching the engine code rather than the trim name when sourcing from a breaker.

Yes, the 840d's diesel straight-six engine (engine code B57) does use a throttle body, which in a diesel primarily controls air recirculation for emissions management rather than throttle response as on a petrol. If you are sourcing a used unit, match the engine code B57 and confirm the model year with the breaker, as configuration details can vary across the production run. A diesel throttle body from another B57-powered BMW (such as certain 5 Series or 7 Series models) may also be worth asking the breaker about as a potential cross-reference.

The M8 uses a high-output version of the S63 4.4-litre V8, which is a different engine from the N63 or B58 units found in standard 840i and M850i models, so the throttle bodies are not a straightforward swap. Even where external dimensions look similar, the calibration and sensor mapping are specific to each engine variant, and any ECU pairing or coding implications are something you must confirm with the breaker against your registration. Stick to sourcing a throttle body that matches your exact engine code for the safest outcome.

Possibly, because BMW uses shared engine families across multiple models — for example, the B58 straight-six appears in the 3 Series, 5 Series, Z4, and 8 Series, and breakers may have compatible units from any of these. The engine code is what matters here, not which model the donor car happens to be, so a B58 throttle body from a 540i could be worth exploring alongside 8 Series-specific stock. That said, confirm the exact part number and any mid-production changes with the breaker before purchasing, as subtle revisions can occur even within the same engine code.