Used BMW 3 Series Coil Spring

No — the E46 (1998–2005) and E90 (2005–2012) are completely different generations with different suspension geometry, so their coil springs are not interchangeable. You must match the spring to the correct generation of 3 Series. Confirm the exact part against your registration with the breaker before buying.

Yes, front and rear coil springs are completely different parts and are not interchangeable with each other. When requesting a quote, always tell the breaker whether you need the NS (nearside/left) or OS (offside/right) spring, and whether it is front or rear. Getting this wrong is a common and costly mistake.

Engine size can affect spring rates because heavier or more powerful variants may have been fitted with different spring specifications from the factory. Name your exact engine when contacting a breaker, and ask them to verify the spring against your registration rather than assuming all engines within the same generation share the same spring.

The E90 received a facelift in 2008 but remained on the same fundamental platform, so suspension components often cross over — however, whether a specific spring interchanges across that boundary is something you should confirm with the breaker against your registration. Do not assume a pre-facelift spring is a guaranteed fit on a post-facelift car without checking. A good breaker will be able to cross-reference the part number for you.

Trim level itself does not define fitment the way generation and engine do, but M Sport and Sport models may have been fitted with different suspension specifications at the factory, which can mean different spring rates or ride heights. Because sport suspension differences fall into an area of genuine uncertainty, you should confirm with the breaker that the spring from the donor car matches your specific trim and registration. Do not simply assume an SE spring will suit an M Sport or vice versa.

The BMW 3 Series uses coil springs across its range — they are a genuine, standard fitment on all mainstream variants including saloon, touring, and coupe body styles across generations such as the E36, E46, E90/E91/E92, F30/F31, and G20. All corners of the car use coil springs in combination with either MacPherson struts at the front or a multi-link rear setup depending on generation. You are looking for a real, commonly available part and breakers will be familiar with it.