Used BMW 4 Series Air Flow Meter

Yes, but only on petrol-engined variants — the air flow meter (also called a MAF sensor) measures intake air on petrol engines, where it plays a key role in fuel management. Diesel engines in the 4 Series use a different air management strategy and do not use a MAF sensor in the same way, so if you have a diesel (for example a 420d or 430d), an air flow meter is not what you need. Check your V5 or run a VIN check to confirm your fuel type and engine code before searching.

The F32 generation covers the 4 Series from 2013 to 2020, with a facelift arriving in 2017 that brought some revised engine specifications. Within the F32, fitment is driven by your engine code rather than the year alone, so two cars from different ends of that range can share the part if they share the same engine code. Confirm your exact engine code from your V5 or a VIN check and supply it to the breaker — that single detail is more useful than the model year.

The 2017 facelift is an important boundary here, because some engine variants were updated at that point and ancillary components including sensors can differ even when the engine code looks similar. Name the boundary to the breaker — tell them your car is a post-2017 facelift and supply your full engine code — and let them cross-reference their part against your registration rather than assuming pre- and post-facelift parts are identical.

Yes — each of those badges corresponds to a different engine code (for example the N20 in the 420i and 428i versus the N55 in the 435i), and the air flow meter is matched to the engine, not the badge. Even where two variants share broadly similar engines, output differences can mean different sensor calibrations, so always match on engine code rather than the number on the badge. Give the breaker your engine code and let them confirm the part number.

No — trim level (SE, Sport, M Sport, M Sport X) is purely about cosmetics, wheels, suspension tuning, and interior finish; it has no bearing on the engine or its air management components. Two 4 Series cars with identical engine codes will use the same air flow meter regardless of which trim they are. Focus entirely on matching the engine code, fuel type, and whether your car is pre- or post-2017 facelift.

The G22 is a completely different generation, introduced from 2020, and uses a new engine family (including B46 and B58 units) that is not shared with the F32 generation. An air flow meter from an F32 is very unlikely to be compatible with a G22, and mixing the two generations is not recommended. Supply your G22 engine code to the breaker and ask specifically for a G22-sourced part to be safe.