Final Stage Heater Resistor Blower Motor Resistor FSU Aftermarket For 3 5 X3 X5 Series E46 E39 E83 E53 64116923204 Replacement blower motor resistor for use with various 3 Series, 5 Series, X3, and X5 models.Fits vehicles with the following part numbers: 64116923204, 64116920365, 64116929486, 64118383835, 64118385549, 64118364173, 64118377579, 64116931680.Designed for use on E36, E46, E46 M3, E46 M3 CSL, E39, E39 M, E83, and E53 chassis models produced between 1991 and 2010.Compatible with HVAC systems in 323Ci, 323i, 325Ci, 325i, 325xi, 328Ci, 328i, 330Ci, 330i, 330xi, 525i, 528i, 530i, 540i, M3, M5, X3, and X5 variants equipped with M52, M54, S54, and N52 engines.This unit controls the blower motor speed and may be required if the fan operates only on certain settings or does not function at all.Features a design with 39 heat sink rods for thermal management.Installation is straightforward and restores full functionality to the heating and air conditioning system.Recommended to replace this unit when replacing the blower motor.The part is supplied as a direct-fit replacement and includes all necessary components for installation.Material is metal with color as shown.Package includes one blower motor resistor kit.