3 Months ago my Girlfriend purchased a 55 Reg 1.6 FSE Golf from a 2nd hand car dealer with 55k on the clock. When we took the car for a test drive, the engine management light was on and we were told that this problem would be resolved before we picked the car up, we had no reason to doubt this. - When we collected the car, the light was off and we were told that the cause was the Catalytic converter which had been changed, we werent given any recepts for the part as they claimed any problems let them know. after a month or so the light re-appeared and we took (still under warranty) it to her local VW dealer as she lives 40 miles from where she got the car. VW diagnosed orignally that the airpipe was damaged and was causing the problem - it looked like it had been super-glued into the car!. Once the new airbox/unit was fitted the light was still there. it took them over a week to find all the problems, and it turned out that all the engine seals needed replacing, aswell as a new manifold and viauors other parts In all, VW charged the 2nd hand car company just under 1k for the labour and parts, which after many calls and battling they reluctantly agreed to pay for. Fast forward another 2 months and the light is back on, VW have diagnosed the main Catalytic convertor causing the problem and have said that it needs replacing and is 3rd party, not OEM! The 2nd hand car company have picked it up and they are claiming that its the secondary cat which is causing the problem and is OEM, the have used 'cat cleaner' which they claim has corrected the problem and the light has gone. They have increased the warranty by a month to cover all the problems. They are going to return the car back to my Girlfriend tomorrow morning, now we have reached the point where we want to return the car as we have no faith in it. she has mentioned this but as they claim to have fixed the problem then we dont really have any reason to, or do we? Also, the previous owner had the car for only 3 months (the garages warranty period) so it appears they had exactly the same problems. Anyone know what our position is with trading standards, and also has anyone heard of Cat Cleaner!?! Thanks!