Second Hand BMW 1 Series Window Switch

The E87 (5-door) and E81 (3-door) share the same first-generation 1 Series platform (2004–2013), but the front door switches differ between 3-door and 5-door body styles because the 3-door carries all rear window controls in the driver's master switch, whereas the 5-door does not — so a direct swap is not guaranteed even within the same generation. Always confirm the door count of the donor car with the breaker before ordering, and match NS (nearside/passenger) or OS (offside/driver) as required. The generation boundary itself is not the issue here — body style and side are what matter most.

Both a 2009 and a 2012 BMW 1 Series fall within the first-generation range (E81/E82/E87/E88, 2004–2013), so there is no generation boundary between them and fitment is plausible provided the body styles and switch position (NS or OS) match. The 1 Series received a facelift in 2007, but window switches are not typically affected by facelift styling changes, so this is less of a concern than confirming door count and side. Confirm both details with the breaker against your registration to be sure.

No — the F20 is the second-generation 1 Series (2011–2019) and is an entirely different platform to the first-generation E87, so the switches are not interchangeable. Always match the generation when sourcing a window switch, and tell the breaker whether you need a first-gen (E81/E87) or second-gen (F20/F21) part along with the body style and side (NS/OS).

For the BMW 1 Series, trim levels such as SE, Sport, M Sport, and M140i do not affect window switch fitment — the switch is determined by generation, body style (3-door or 5-door), and side (NS nearside/passenger or OS offside/driver). You may find minor cosmetic differences in finish or button colour between switches from different trim levels, but these do not affect whether the switch will physically fit and function. If colour match matters to you, mention it to the breaker, but treat it as a preference rather than a fitment requirement.

The F20 ran from 2011 to 2019 and received a significant facelift in 2015 — while the underlying platform is the same, interior switch designs can change across a facelift refresh, so a post-2015 switch may not be identical to a pre-2015 one. Whether they are directly interchangeable in practice is something to confirm with the breaker against both registrations, as connector designs and switch cluster layouts can vary. Always specify NS or OS and your door count (3-door F21 or 5-door F20) when asking.

Yes — year and model alone are not enough; you should also tell the breaker the generation (E81/E87 first-gen or F20/F21 second-gen), the body style (3-door or 5-door, as the switches differ), and which side you need: NS (nearside, passenger/left) or OS (offside, driver/right). The driver's master switch on a 3-door carries rear window controls and is therefore a different part to the equivalent switch on a 5-door, so this detail is especially important. Engine type and colour do not affect fitment.