Yes, your quite right in that most cars have issues, a fact I am only to aware of as I have recently cracked a liner in my Focus st, a potentially very expensive issue, and also one which is well known! These problems just highlight the advice to get any potential purchase thoroughly inspected prior to purchase. I see that eurospares have replacements for £395, which all in all isn't too bad, providing its just the odd one. I paid similar for a pair of uprated ones for my Focus, so double the price for a supercar doesn't seem to be too bad.