Thank you for your replies, I did describe the car fairly and honestly, but feels like its a my word against his word situation, I know the belt was changed but the only proof is my word and the invoice for the parts, you can see in the pictures its a non OEM water pump but that could be subjective, I understand he is angry with the situation, but I was honest about the car I was driving it daily and had zero concerns about it, I have tired to explain it was done and provided a copy of the invoice and highlighted the water pump is non factory and you can see the yellow witness marks from when the belt was changed and he has just been very unlucky. I think the main problem is he has bought a 13yr old car for £1320 and he expects trouble free motoring and reliability you would get with a brand new car, end of the day its a £1320 banger. he sent me a letter demanding monies and quoted the sales of goods act and claiming I only have 14days to reply I think he is trying to scare me into payment. He failed to include the actual invoice from the garage, all he included was a copy of his bank statement, to show he had paid out £650, however this is to a persons name not a garage, (he wrote in pen saying garage owner). He has waited 5 weeks from paying the garage to contacting me as well.

Not sure if this the right place of not. I sold a car April 2023, I had owned and used the car for 6years, with no issues, the timing belt/water pump had been changed Oct 2020, The car was sold via Ebay auction, I had put in the description that the car had the timing belt changed 2020 (120k) along with the clutch etc..... as these are A: true and B:good selling points. The chap who won the car on Ebay came to collect, looked the car over test drove it and was happy with the vehicle and the sale was completed. (no bill of sale). Unfortunately the timing belt failed on the car 3 months after the sale. the buyer is claiming I lied about the belt been changed, unfortunately the only evidence I have is the invoice for the parts not for the fitting. He sent pictures (which you can see its a non OEM water pump) He has since sent me a letter claiming sales of goods acts etc.... and that I need to pay £650 within 14days . whats my legal standing regarding this, I sold the car in good faith it was my daily driver for a long time and never had any doubt about its reliability. I am a honest person and did not lie about the belt been changed, but its my word against his. in his letter he has failed to include a the garage invoice or a breakdown of works done. likewise failed to provide quotes for the job etc...