Why Diagnose Before Replacing a CV Axle?
Clicking or vibration identifies a symptom, not automatically the failed component. A wheel bearing can create humming or vibration. A suspension component can clunk. An engine mount can create movement under acceleration. Tire or wheel problems can also cause vibration.
A torn CV boot and a failed CV joint are related, but they are not always the same condition. The repair depends on joint condition, contamination, grease loss, vehicle design, and inspection findings.
If the source is unclear, see Suspension Inspection and Repair Service or Car Diagnostic Service. If the main symptom is grinding when braking, see Brake Service.