This KYB Shock Absorber Protection Kit is designed for the front axle and is compatible with various BMW models including 1 Series (F20, F21), 2 Series (F45, F46, F22, F23), 3 Series (F30, F31, F34, F80), X1 (F48). It is suitable for vehicles without M Performance, sports suspension, bad road version, M technology, or electronic suspension control. The kit is also for vehicles without Adaptive Drive. OEM references include 31306791712, 31336855440, 31336858239, and 31336860753. This kit provides essential protection for your shock absorbers.