Original BMW Bulb Socket, Tail Light Position, for BMW E36 3 Series, E34/E39 5 Series, E65/E66 7 Series, E31 8 Series, Z3, and Z4 (1989–2007)

The Original BMW tail light bulb socket, part number 63-21-1-379-399, is the factory bulb holder used in the rear lighting of BMW 3 Series, 5 Series, 7 Series, 8 Series, Z3, and Z4 models built between 1989 and 2007. BMW calls it a bulb socket and has produced this design since November 1987, which is why one number covers cars as different as an E34 535i and an E85 Z4. It weighs 13 g and is made in Germany. A bulb socket holds the bulb in position and carries current from the wiring to the bulb contacts, so a damaged socket can leave a lamp dark even with a good bulb fitted.

Original BMW Parts carry a 24-month parts warranty.

This number replaced the earlier 63-21-6-903-649. BMW marks the change as exchangeable retrospectively, so the current socket goes into cars that left the factory with the older part. If an old invoice or a part in hand shows 63-21-6-903-649, this is its current replacement. The socket is sold individually, so order one for each lamp position you plan to service.

Technical Details

• Manufacturer: BMW, sold as an Original BMW Part
• Part number: 63-21-1-379-399
• BMW part name: bulb socket
• Position: tail light
• Weight: 13 g (0.46 oz)
• Production start: November 1987
• Supersedes 63-21-6-903-649, exchangeable retrospectively
• Made in Germany
• Sold individually
• Warranty: 24-month parts warranty on Original BMW Parts

Common Questions

Does this replace 63-21-6-903-649?
Yes. BMW superseded that number with 63-21-1-379-399 and rates the change as exchangeable retrospectively.

How many sockets come in one order?
One. The socket is sold individually, so order the quantity your repair needs.

Where is it made?
This socket is made in Germany.

Fitment & Compatibility

Compare your production year and trim against the table below. PMB Performance can confirm this against your VIN, backed by more than 20 years of parts and fitment work.