BMW OEM Ref. #12131748017 , 12131748018 , 12139067830. Bosch Ref. # 0221504029 , 00110. This coil over plug Ignition Coil SET of 6 feature the following specifications:For LH (Driver Side) or Front (Radiator Side) & RH (Passenger Side) or Rear (Firewall Side) - Complete Engine Set. New not remanufactured. Direct replacements.