Bilstein B3 Series OE Replacement Rear Coil Spring for 1999-2006 BMW 3 Series (38-129230)

Fits select 1999-2006 BMW 3 Series models (323Ci, 323i, 325Ci, 325i, 325xi, 328Ci, 328i, 330Ci, 330i, 330xi).

The Bilstein B3 OE Replacement rear coil spring is a direct-fit solution designed to restore your vehicle's factory suspension geometry, safety, and ride quality. By matching the original equipment dimensions and spring rates, these coils effectively replace sagged, worn, or broken factory springs to return your BMW to its intended handling characteristics.

Constructed from high-grade chrome vanadium or chrome silicon steel, these springs provide superior break resistance. Each unit undergoes a hot-setting process after forming to prevent height loss and ensure long-term durability. Depending on the specific application, Bilstein B3 springs utilize innovative technical designs such as pigtail ends, minibloc shapes, or central force designs to ensure precise fitment and performance in the rear spring perches.

• Direct replacement for factory rear coil springs
• Restores original ride height and suspension safety specifications
• High-strength chrome vanadium or chrome silicon steel construction
• Hot-set processing prevents premature sagging and height loss
• Matches OE technical designs (pigtail, minibloc, or central force)
• Manufacturer Part Number: 38-129230