Keeps your ALPINA, BMW running the way it should — this BORG & BECK part restores the original function of a worn or failed Control Trailing Arm BORG & BECK OE Ref 31121141723, built to OEM reference 31121141721 rather than a generic approximation.
BORG & BECK identifies it as BCA5956, EAN: 5055188228598. Match that against OEM 31121141721 or your old part before fitting, particularly if your vehicle's had any running changes across its production years.
Confirmed for selected ALPINA, BMW vehicles. Use the vehicle registration lookup tool if you're not certain, or browse Suspension for other options.