Second Hand BMW 3 Series Differential

No — the E46 (1998–2006) and E90 (2005–2013) are different generations with different subframes, driveshaft flanges, and axle widths, so the differential is not a straight swap between them. Even where an engine code appears in both generations, the surrounding hardware changed significantly enough that cross-generation fitting is not reliable. Always confirm against your registration with the breaker before buying.

Yes — engine code is the single most important detail for differential compatibility, because BMW fitted different final-drive ratios and output-flange sizes to match specific engines and gearboxes across the 3 Series range. The badge on the boot (for example '320d' or '330i') gives a broad guide, but the actual engine code on your V5 or a VIN check is what the breaker really needs. Supply that code alongside your registration when requesting a quote.

The E90 generation ran from 2005 to 2013 with a facelift in 2008, and for many engine families the differential carried over across that facelift point. However, ancillary and mounting changes can occur mid-production even within the same generation, so whether a specific unit crosses the 2008 facelift boundary cleanly is something you should confirm with the breaker against your registration rather than assume.

Yes, it can matter — different diesel engines in the same generation typically run different final-drive ratios to suit their power and torque outputs, so a differential from a 320d is not necessarily correct for a 330d even if the cars look identical. Your engine code (printed on the V5 and visible on the engine block) will confirm exactly which unit the breaker should be matching. Never assume a diesel-to-diesel swap is safe without checking the codes.

Trim level alone — SE, Sport, M Sport, or M Sport Plus — does not change the differential specification; what drives fitment is the engine code, fuel type, and gearbox type (manual or automatic). You may find minor cosmetic differences on a donor car such as a different exhaust surround or bodykit, but these have no bearing on whether the differential itself fits. Match on engine code and gearbox type and the trim badge is irrelevant.

Yes — manual and automatic gearboxes can use different output-flange sizes and may drive different final-drive ratios, so a differential from an automatic car is not always compatible with a manual conversion and vice versa. Always tell the breaker both your engine code and your gearbox type when requesting a quote. Confirm fitment against your specific registration before purchasing.