Load testing ensures guaranteed performance every timeBrushes are precisely designed to ensure armature and contacts are properly matched; designed with a stronger, less brittle material than O.E. to prevent premature wear, stripping and breakageDesigned with extra torque motors to prevent premature failure resulting from improperly lubricated window lift regulators; every motor is assembled with the precise amount of lubricant to ensure quiet operation and long lifeMagnets deliver the right amount of torque needed to withstand extreme weather conditions and to compensate for other worn components in the window lift systemGuaranteed fit and function; meets or exceeds O.E.M. performance