The Bilstein B3 OE Replacement 96-99 BMW 328i Rear Coil Spring is a direct replacement for the original equipment spring on 1996-1999 BMW 328i models. This spring is designed to provide improved handling, more responsive steering and improved ride comfort. It features a progressive rate design for increased control and comfort, and is constructed from high-quality materials for strength and durability. The spring is pre-assembled for easy installation and is backed by a limited lifetime warranty.