SPARCO Steering Wheel Boss Kit for BMW 3 Series E36 December 1990-April 1998 or 850i 1991 or later Cast iron steering wheel hub with a compressible steel frame that collapses in case of impact. Absorbs kinetic energy in case of accident in order to protect the driver. Compatible with all 6-hole steering wheels. For BMW 3 Series E36 from December 1990 to April 1998 or BMW 850i from 1991 or later. ONLY compatible with vehicles equipped with an airbag. Horn push sold separately (ref 615000) Airbag resistor kit sold separately (ref 615SP)