Keeps your various running the way it should — this HELLA part restores the original function of a worn or failed Towbar Socket Testing Unit OE Ref 443000278, built to OEM reference 1536363 rather than a generic approximation.
HELLA identifies it as 8PD 004 508-011, EAN: 4082300315943. Match that against OEM 1536363 or your old part before fitting, particularly if your vehicle's had any running changes across its production years.
Confirmed for selected various vehicles. Use the vehicle registration lookup tool if you're not certain, or browse Tow bar Parts for other options.