Original BMW Single-Pole Tail Light Bulb Socket for BMW 740i and 740iL (1999–2001)

For the E38 7 Series, this Original BMW single-pole bulb socket holds a bulb in the tail light assembly of the 740i and 740iL (1999–2001). A single-pole socket carries one electrical contact to the bulb, and the socket gives the bulb a secure seat inside the light. It weighs 10 g (0.35 oz), BMW shows production of this number starting in September 1998, and it is made in Hungary. If the light housing is damaged or poorly sealed, water can get inside, corrode the electrical contacts and wires, and leave you with a light that works only some of the time. Moisture buildup inside the lens is the warning sign.

Original BMW Parts carry a 24-month parts warranty.

The tail light assembly is the housing and everything in it: the lens, the bulbs for the tail, brake, reverse, and turn signal functions, and the reflectors. BMW uses this single-pole socket across the E38 range, and it appears on the 740i and 740iL with both the M60 and M62 V8 engines. If the lens is cracked or broken, it should be replaced to prevent further damage.

Technical Details

• Manufacturer: BMW (Original BMW)
• Part number: 63-21-8-381-244
• BMW part name: bulb socket, single-pole
• Position: tail light assembly
• Weight: 10 g (0.35 oz)
• Chassis: E38 7 Series
• Production start: September 1998
• Country of manufacture: Hungary
• Sold as: one socket
• Warranty: 24-month Original BMW parts warranty

Common Questions

What does single-pole mean on this socket?
BMW designates it single-pole, meaning it provides one contact circuit to the bulb.

Why do tail light sockets fail?
Water entering a damaged or poorly sealed housing corrodes the electrical contacts and wires, which can make the light malfunction.

Fitment & Compatibility

Compare your production year and trim against the table below. PMB Performance has spent over 20 years matching parts to vehicles and can verify this against your VIN.