The first and most obvious question I need to ask of you is this: Did you read what the Warranty actually said at the time when you purchased the car ? If it clearly states that the amount covered is fopr a maximum amount of �500 then that's all you may claim under the terms of the warranty. Do also be careful here, because the Garage from where you purchased the car in the first place may counter-claim that the car was rendered in its present poor state through neglect or misuse on your part. It is never as straightforward as we seem to imagine. If, on the other hand, you have discovered that the Graage have sold you a car which you may claim to be unroadworthy then you are well advised to contact your local Trading Standards Department based at your local authority. Furthermore, in all cases such as this it is always best to have arranged for an examination of the vehicle by the RAC or AA before you took delivery of it; never trust a second-hand motor vehicle without first having had some expert advice as to its authentic condition. Under the Sale & Supply of Goods Act 1982, as amended, there is no strict time limit on which you may lodge your claim, but the procedure in getting to the stage of court proceedings is long and complicated. Best course of action in the first place is your local Trading Standards Officer.