Original BMW Third Brake Light Bulb Socket for BMW E39 525i, 528i, 530i, 540i, and M5 (1997–2003)

When the third brake light on an E39 5 Series goes dark because its socket has failed, this Original BMW bulb socket restores it on the 525i, 528i, 530i, 540i, and M5. The socket holds the bulb and carries power from the harness to its contacts, so a damaged socket can leave a good bulb unlit. It mounts in the rear parcel shelf, under the third brake light. The socket weighs 13 g (0.46 oz) and is made in Hungary. BMW shows production of this number beginning in January 1996.

Original BMW Parts carry a 24-month parts warranty.

BMW's parts data ties this socket only to the E39 chassis, covering the M52 and M54 six-cylinders, the M62 V8 in the 535i, 540i, and 540iP, and the S62 in the M5, along with the diesel versions sold elsewhere. Because it is specific to the E39, it is not shared with the earlier E34 or the later E60. A failed socket leaves the third brake light out, which can draw a fix-it ticket, and replacing it restores the light.

Technical Details

• Manufacturer: BMW
• Part number: 63-25-8-375-599
• BMW part name: bulb socket
• Application: third brake light
• Location: rear parcel shelf, under the third brake light
• Weight: 13 g (0.46 oz)
• Production start: January 1996
• Made in Hungary
• Sold individually
• Warranty: 24-month parts warranty

Common Questions

My third brake light bulb is good but will not light. Could the socket be the cause?
Yes. A damaged socket can stop the bulb from lighting, and replacing it restores the third brake light.

Where is the socket located?
It sits in the rear parcel shelf, under the third brake light.

It is an inexpensive repair that gets your E39's center brake lamp back in service.

Fitment & Compatibility

Check the table below for the exact year, model, submodel, and any listed notes. PMB Performance can confirm this against your VIN, backed by more than 20 years of parts and fitment work.