To lock the flywheel through the gearbox bell housing on chain driven petrol and diesel engines.
BMW applications: M47T2, M57T2, M67, N43, N45, N45T, N46, N46T, N47, N51, N52, N53 and N54.
MINI applications: W17 diesel engines.
Equivalent to OEM 11 8 180, 11 8 181, 11 8 182, 11 8 183, 11 8 184 and 11 8 185.