Rear main bearing holder, L=32.0 mm, 3-stud mounting ►see details

R51/3 VIN 526760 to 527210 (after that, 5-stud mounting)

R67/2 VIN 612001 to 612501 (after that, 5-stud mounting)

The BMW specification for the rear crankshaft bearing and the bearing holder is an interference fit of 0.03 to 0.05 mm.

It is recommended to check the inner diameter of the bearing holder: it should be 71,950 - 71,965 mm, measured after installation of the bearing holder in the engine housing.

If the diameter is smaller (a new bearing holder), it is strongly recommended to ream the bearing holder to this diameter while installed in the engine housing.

If the diameter is larger, it's recommended to install a new bearing holder.