Thanks for replying Bruce, really appreciate your response. I love the colour of your 320 btw, it's gorgeous. I can't recall my partners Dad ever having any engine problems and just before Christmas it went to BMW and had a major service done, so I guess any timing chain issues would have been pointed out by BMW? The car has been sat in storage for some time though as my partners parents emigrated about 18 months ago, so it's been in and out of storage. It has had all it's services done when it's been in use, so there's no problems there. I just wondered what the engines were like on these cars. I've never owned a BMW, but know most German cars are built to last as long as they're looked after, which this one has been. With regards to the resetting of the computer, is there a machine you can buy that reads fault codes and that will clear the service computer?