BMW 33217540117 Exterior Repair Kit Bellows

The CV boots are very important because they prevent dirt, water and foreign material from entering and damaging the constant velocity (CV) joints. Oil and grease can cause the boot material to deteriorate prematurely, so it's a good idea to wash the boots with soap and water. Because it constantly pivots back and forth following the steering action of the front hub, the outer CV boot wears out sooner and should be inspected regularly. Inspect the boots for tears and cracks as well as loose clamps. If there is any evidence of cracks or leaking lubricant, they must be replaced. On AWD models, there are front driveaxles in addition to the CV boots at the rear.