BMW 3 Series AC Compressor Replacement Parts

No – the E46 (1998–2006) and E90 (2005–2013) are entirely different generations with different engines, mounting points, and refrigerant system layouts, so their AC compressors are not interchangeable. The engine code on your V5 is the most useful detail you can give a breaker, as fitment follows the engine rather than the generation badge alone. Never assume a part crosses a generation boundary without confirming against your registration with the breaker.

The E90 facelifted in 2008, and while many mechanical components carried over, ancillary mounting and bracket changes mid-production mean you should confirm compatibility against your specific registration with the breaker rather than assuming a pre-2008 unit will drop straight in. The engine code is the critical detail here – a matching engine code on both donor and recipient car is the strongest starting point. Confirm with the breaker against your registration before purchasing.

The F30 ran from 2012 to 2019 and facelifted in 2015, so within that generation there is a reasonable chance of compatibility if the engine codes match, but ancillary and mounting changes can occur mid-production and are not always tied to the facelift year. Give the breaker both your registration and your engine code, which you can find on your V5 or via a VIN check, and let them verify fitment on their side. Do not assume year-to-year compatibility without that check.

No – SE, Sport, and M Sport are trim levels that affect interior specification, styling, and suspension tuning, not the AC compressor. The compressor is driven by the engine and follows the engine code, so a unit from an SE with the same engine code as your M Sport is mechanically the same part. You may find cosmetic differences on ancillary brackets or hoses depending on the donor car's age, so mention your registration to the breaker to rule out any minor production variations.

Fuel type affects the engine code and therefore the ancillary drive setup, so a compressor from a petrol 3 Series will not necessarily suit a diesel, even within the same generation and year range. Always match on engine code first – for example, an N47 diesel engine should be matched to a donor car carrying the same N47 code rather than a petrol N43 or N46. Confirm with the breaker against your registration to be certain.

Whether a replacement AC compressor requires any ECU pairing or immobiliser coding to your specific vehicle is something you should confirm with the breaker and your fitting garage, as this can vary by model year and system configuration. It is not something that can be stated as a blanket rule here, and getting it wrong could leave the system not functioning correctly after fitting. Raise this directly with the breaker and the technician carrying out the work before you buy.