
Perhaps one of the best ways to ascertain if your mechanic is telling truth about the repairs you need is to be familiar with your car and how it functions. This can be as simple as reading a book on the subject or searching the internet for information. You can also check to see if the prices your mechanic quotes are fair.
Another reliable option is to find a mechanic who has passed an Automotive Service Excellence certification. This requires your mechanic to have passed knowledge and skill tests on car repair. You can also search for a mechanic that specializes in your brand and make of car.