The Clutch Release Bearing was correct for my 1991 BMW M3 E30. The Bearing was NOS, "very old" NOS. The outer ring of the bearing face had surface rust and the bearing itself was stiff to turn. I cleaned up the rust and worked the bearing to free up the lubrication. It is still stiffer to turn than a brand new bearing, but I installed it anyway. We will see if it works properly.