Zero Depreciation, an add-on cover, is known by many different names like Nil depreciation or Bumper to Bumper Cover. If you have attached this add-on to your comprehensive car insurance policy, depreciation value is not subtracted from the coverage of wearing out of any body parts of the car, excluding tyres and batteries. The insurance company will pay out the entire cost of the body part for replacement. Check out the dedicated page on Zero Depreciation to know more.