Other than the engine and wheels, axles are probably one of the most important but overlooked parts to your car. Cars today generally have split axles, which allow for more sophisticated suspension systems, and in addition to supporting the weight of your vehicle, help drive and steer the car. A common problem with axles can be wear the axle connects to the wheel. This connection is called the CV joint and is protected by the CV boot. To prevent potentially costly and unnecessary wear and tear, it's important to quickly fix a ripped or torn CV boot.