Just found out the Catalytic Converter is nakered on my car and the turbo is leaking oil... I have only just bought it! The car has covered 81k miles and is an 02 1.8T, should I get the work done by the garage I bought the car from, or just give it back and walk away? Is is normal for a cat to go on an 02 plate car with 80k miles? How much is it to replace?