Used BMW 1 Series Bonnet Strut

The BMW 1 Series (all generations) uses a gas-filled bonnet strut rather than a traditional stay rod, so yes, this is a genuine part on the car. There are typically two struts, one on each side of the engine bay, holding the bonnet open without needing a prop. If you are missing one or both, a used strut from a breaker is a common and straightforward replacement.

The first-generation 1 Series ran from 2004 to 2013 across the E87 (5-door hatch), E81 (3-door hatch), E82 (coupe) and E88 (convertible) body styles, and bonnet struts within this generation are generally shared as the front-end structure is consistent across those variants. However, you should confirm the specific part number with the breaker against your registration before purchasing, as there can be subtle differences between body styles. A good breaker will be able to cross-reference your reg to make sure the strut matches.

The first-generation 1 Series received a facelift in 2007, and the second-generation F20/F21 received a facelift in 2015, with both updates primarily affecting lights, grilles and bumpers rather than the bonnet or its supporting struts. In most cases the bonnet strut itself is unaffected by the facelift, but whether a pre-facelift strut directly interchanges with a post-facelift one is something you should confirm with the breaker against your registration rather than assume. It is always worth giving the breaker your reg so they can verify the correct part.

No — the E87 (first generation, 2004–2013) and the F20 (second generation, 2011–2019) are entirely different platforms with different bonnets, so the struts are not interchangeable between these generations. You need to source a strut specifically for the F20/F21 second-generation car, and for a 2015 model you should also let the breaker know it is a post-facelift F20, as they can confirm the correct fitment against your registration.

Trim level does not affect bonnet strut fitment — the strut is determined by the generation and body structure, not whether the car is an SE, Sport, M Sport or M135i. All of those trims share the same bonnet and strut setup within a given generation, so you do not need to hunt specifically for an M Sport or SE donor car. Just make sure the strut comes from the correct generation (E87 first-gen or F20/F21 second-gen) and confirm with the breaker using your registration.

Gas struts do weaken with age and use, so when buying used it is worth asking the breaker how the strut feels and, if possible, whether it was tested on the donor vehicle. A strut that is too weak to hold the bonnet open is a common fault and is usually the reason customers are replacing theirs in the first place. Buying from a reputable breaker who offers a short warranty or returns policy gives you more confidence, and fitting is straightforward enough that you can test it quickly once the part arrives.