This term stands for Original Equipment Manufactured . The meaning to this term is that of an automotive maker or partner that had originally developed parts or concepts for the vehicle when it was first produced . It is important to take note that there is no difference in standards of a OEM holder or that of the aftermarket part maker they all have to meet federal motor vehicle safety standards to be installed  . This is just a clear contractual holding of a maker or partner that had the first opportunity to develop such parts.