Used BMW 3 Series Quarter Panel

No — the E46 (1998–2006) and E90 (2005–2013) are entirely different generations on different platforms, and the quarter panels are completely different pressings with no interchangeability. Generation is the first thing to pin down when sourcing a quarter panel, so always match E46 to E46 and E90 to E90. Ask your breaker to confirm the exact generation against your registration before ordering.

The E90 ran from 2005 to 2013 with a facelift in 2008, and whether the pressing changed across that boundary is not something that can be stated with certainty as a blanket rule. Name the boundary — 2008 — to your breaker and ask them to check the part numbers against your specific registration, as mid-generation pressing changes can catch buyers out. Never assume pre- and post-facelift panels swap straight over without that confirmation.

Yes, body style matters enormously for quarter panels — the saloon (E90/F30), touring estate (E91/F31), and coupe (E92/F32) all have completely different rear quarter pressings that will not interchange. Always specify your exact body style to the breaker alongside the generation, as these are sold as separate donor cars in the yard. A quarter panel from the wrong body style simply will not fit, regardless of year.

Trim level — SE, Sport, M Sport, M3 — does not affect the steel quarter panel pressing itself, so a panel from an SE donor will fit an M Sport car of the same generation and body style. You may find cosmetic differences such as different factory paint codes or whether the donor car had a side sill extension, but the panel itself is the same stamping. Focus on matching generation and body style rather than trim, and your breaker can advise on any cosmetic finishing differences to expect.

No — nearside (NS, passenger side) and offside (OS, driver side) quarter panels are mirror-image pressings and are not interchangeable left to right. Always tell your breaker clearly whether you need the NS or OS panel, as both will come up in searches and the wrong one cannot simply be flipped to fit. Confirming NS or OS against your car before the breaker pulls the part will save you a wasted trip.

Both a 2005 and a 2012 3 Series could be E90-generation cars (2005–2013), but you must also match body style exactly — saloon, touring, or coupe — as those share a platform but use completely different quarter panels. The 2008 facelift is also a boundary worth raising with your breaker, since whether early and late E90 pressings are identical is something to confirm against the specific part numbers rather than assume. Give your breaker both registrations and let them cross-reference before anything is pulled from the car.