While a car warranty would provide coverage for your car in cases of repairs and maintenance, it is important to remember that a car warranty is not the same as an insurance coverage.  Car warranties work by aiding the vehicle owner in the cost of maintenance and repairs on the vehicle, but only so long as the parts that are covered are those that are being replaced or repaired.  Car warranties are very tricky documents because even though a warranty contract says that your vehicle is fully covered, a lot of things can still go wrong in a claim for re-imbursement or vehicle repair assistance.
Of the many problems that may arise during a claim at a car warranty dealership or service provider, one of the most common is that you are not covered for the type of claim that you are making.  Some car warranties provide bumper to bumper coverage.  This is the highest level of coverage that most services offer, and it covers everything in your car besides the wear and tear.  The catch is however to ensure that the parts not covered are listed, because what you may consider as being included, your warranty company may have listed in the wear and tear non-covered section.