Description Reviews Here at the shop, we see the MINI Cooper Water Pump Friction Wheel go bad from time to time. This is an OEM part. Normally, you hear the bearing in the wheel clicking loudly. Don't wait until this part fails; replace it before it stops running your water pump and you can't cool your car anymore! Fits all Gen 2 motors, Cooper or Cooper S. While you're there, take a look at your water pump and your water pump wheel!