Bilstein 04-07 BMW 525i B3 OE Replacement Coil Spring - Rear

What you get in this box is a single Bilstein B3 OE Replacement rear coil spring, built to match the original specifications for a wide range of BMW 5 Series models. This spring is designed to bring your vehicle's suspension back to its intended height and ride characteristics, ensuring it handles and performs like it did when it left the factory. It's a direct replacement for your worn-out or sagging rear spring, helping to restore proper ride height and stability.

Bilstein manufactures these springs using high-quality chrome vanadium or chrome silicon steel, which offers strong resistance to breaking. They pay close attention to the original design, including things like minibloc shapes or central force designs, and ensure the spring rates are correct. After forming, the springs go through a hot setting process that helps prevent them from losing height over time. This means you're getting a well-built part that's made to last and perform reliably, restoring your BMW's suspension system function and safety to factory specifications.