Bilstein B3 OE replacement coil spring for 2004–2007 BMW 525i rear is manufactured to OE dimensions and spring rates for a direct-fit replacement. Built from high-quality steel with design features such as minibloc or central force shapes and hot-setting after forming to prevent height loss, the spring restores suspension function and safety to factory specifications for the listed years.
Bilstein 04-07 BMW 525i B3 OE Replacement Coil Spring - Rear