BMW e36 e38 e53 Bulb holder Socket Tail Light GENUINE Brand NEW w/ 1yr WARRANTY Bulb Socket for Tail light Bulb. BMW part# 63 21 1 387 365, note the mid-year splits. Genuine BMW part, recently made: not been lying around. Please NOTE the mid-year split on PRODUCTION date. See Model chart below. Not sure about your car? email us your VIN to confirm fit.