Mazda2. A circular disk covered in rubber or plastic with a hole in the center where the edge is sometimes tensioned by a spring that prevents fluid from leaking at the CV Axle Shaft Carrier Bearing. A component used to prevent leakage from the cv Axle Shaft. Part serviced with intermed Shaft. Dust. Bracket. CV Carrier Bearing. CV Support Bearing. Inner. Included with: Intermediate Shaft.