A car is like a human body - ignoring smaller failures may cause a major malfunction:

If your car is not working the way it should be, makes strange and disturbing noises, the engine is working unevenly or there's something wrong with the brakes, it means that one of the systems is malfunctioning. If you are not able to tell the failure yourself, visit a garage to have your car diagnosed. If you decide to have your car repaired in given garage, the cost of the diagnosis will be deducted from the cost of the repair.

The cost of a repair is determined based on precise identification of a failure