I have just found that a major dealer who "repaired" my 1.8i Freelander station wagon ('98) forgot to replace the complete airbox after replacing the gearbox!! I suppose I was naive in not checking that they had done the work properly, but I have put nearly 1000 miles on it since then. My question is this: what sort of damage will an unfiltered engine likely to have sustained and can I sue them for negligence and/or a new engine!!??