Yes, you should be worried. A question every buyer of a second hand small car should ask is "was it a driving school car?" If the dealer says it wasn't, have that written on the purchase contract. What you should now do is send a letter by recorded delivery to the dealer principal of the dealership that sold you the car stating that because the car was ex-driving school the drivetrain must inevitably have suffered some damage, so if there is any failure of any component of the drivetrain within three years (including the clutch and flywheel) you will hold the dealer legally responsible for having sold you a car of "unsatisfactory quality" and will demand its repair free of charge. Law at: www.honestjohn.co.uk/faq/faq.htm?id=43 . This is entirely different from buying an ex-rental car, which are usually very good buys because they have been run in by a variety of different qualified drivers.