Second Hand BMW Z4 Sill

The BMW Z4 has run across two distinct generations: the E85/E86 (2003–2009, a roadster and coupé on the same platform) and the G29 (2018–present, roadster only), with a separate E89 generation in between (2009–2016). Sills are body-specific pressed panels, so parts will only interchange within the same generation — an E85 sill will not fit a G29 and vice versa. If you are looking at a sill from the same generation as your car, confirm the exact pressing with the breaker against your registration before buying, as mid-generation changes can affect panel profiles.

No — the E89 (2009–2016) and E85 (2003–2009) are completely different platforms with different body structures, so their sills are not interchangeable. Always make sure the donor car's generation matches yours exactly. Your breaker will be able to cross-reference using your registration to confirm compatibility.

No — the sill is a structural body panel and fitment is determined by the generation and body style of your Z4, not by which engine or trim level you have. The Z4 has always been a two-seat roadster (or coupé in E86 form), so there are no body-style variations to worry about within a given generation. You may find cosmetic differences such as colour or any body-kit styling between certain trim or M Sport variants, so check finish details with the breaker, but the underlying panel dimensions are unaffected by trim.

Both 2006 and 2008 fall within the E85/E86 generation (2003–2009), so there is a reasonable chance the sill will be compatible. However, mid-generation pressing changes can occur without a formal facelift, so you should confirm fitment with the breaker against your specific registration rather than assuming all E85-era sills are identical.

Yes, potentially — the E85 is the roadster and the E86 is the coupé, and while they share a platform, the body structure around the sill area can differ between an open-top and a fixed-roof car. Whether the pressed panel is actually identical or differs is something you should confirm with the breaker against your registration before purchasing.

Yes, absolutely — sills are side-specific, so a nearside (NS, passenger side) sill will not fit the offside (OS, driver side) and vice versa. Make sure you clearly specify which side you need when requesting quotes from breakers, and double-check that the donor part matches your requirement.