Original BMW Headlight Bulb Adapter for BMW 528i, 540i, and X5 (1997–2004)

BMW part 63-12-8-362-503 is an Original BMW headlight bulb adapter that holds the bulb in the headlight of the E39 528i and 540i and the E53 X5 3.0i, 4.4i, and 4.6is from 1997–2004. BMW names it the adapter for bulb, and it is also known as a headlight socket. It weighs 18 g and is sold individually as one piece. BMW has produced this number since September 1995.

Original BMW Parts carry a 24-month parts warranty.

This adapter is shared between two chassis, the E39 5 Series and the E53 X5. BMW's parts data shows no supersession for it, so the same number has served both platforms throughout. A bulb adapter holds the bulb in the headlight and carries the electrical connection.

Technical Details

• Manufacturer: BMW (Original BMW Parts)
• Part number: 63-12-8-362-503
• BMW part name: adapter for bulb
• Position: headlight
• Weight: 18 g
• Production start: September 1995
• Chassis: E39 and E53
• Sold as: one piece
• Warranty: 24 months on Original BMW Parts

Common Questions

Does this fit both the 5 Series and the X5?
Yes. BMW uses the same adapter in the E39 528i and 540i and the E53 X5 3.0i, 4.4i, and 4.6is.

How many come in an order?
One adapter per order.

Fitment & Compatibility

Use the fitment table below to confirm the exact year, make, model, submodel, and any application notes before ordering. With over 20 years of parts and fitment experience, PMB Performance can match this to your VIN.