Each policy is different, but most service contracts do not cover all repairs. Repairs for brakes, clutches, and other common parts that can be repaired during routine car maintenance may not be in the service contract.
A vehicle service contract from a reputable dealer or company is an excellent thing to buy. However, such contracts can be voided if the rules are not followed.
If you live far from where you work and make multiple trips a day, the limited warranty on your vehicle will be short-lived. Buying a vehicle service contract that kicks in when the warranty expires can help extend coverage on your vehicle.