Original BMW Xenon Lighting Bulb Socket for BMW E39 525i, 528i, and 540i (1999–2003)

Part of the xenon lighting system on the E39 BMW 525i, 528i, and 540i, Original BMW bulb socket 63-21-8-371-324 holds the bulb in place and connects it to the vehicle wiring. A bulb socket locks the bulb in its housing and carries the contacts that pass power from the harness to the bulb, .. BMW names this part a bulb socket, and it is also sold as a bulb holder. It weighs 56 g, is made in Germany, and is sold individually.

Every Original BMW Part comes with a 24-month parts warranty.

BMW ties this socket to the E39 5 Series chassis and has produced the number since October 1996. One part number covers the 525i with the M54 six-cylinder, the 528i with the M52, and the 540i with the M62 V8, so the engine does not change the socket you need. Because the same socket fits all three models, the engine does not change which socket you need.

Technical Details

• Manufacturer: BMW, genuine part
• Part number: 63-21-8-371-324
• BMW part name: Bulb socket, also called a bulb holder
• System: xenon lighting
• Weight: 56 g (0.1 lb)
• In BMW production since October 1996
• Made in Germany, sold each
• Warranty: 24 months

Common Questions

Does the engine change which socket I need?
No. The same socket fits the 525i, 528i, and 540i in the years shown.

What lighting system is this socket for?
This socket is part of the E39 xenon lighting system.

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

Keep your E39 lighting working with factory BMW parts from PMB.

Fitment & Compatibility

Compare your production year and trim against the table below. Send your VIN and PMB Performance will confirm the fit, drawing on more than 20 years in the trade.