A mate of mine took his Vectra to a main Vauxhall dealer once to have an ECU fault sorted. Admittedly it did have issues namely a MAJOR oil leak which caused it to lose nearly a litre of oil a day, it wasn't burning it, it was dropping it straight on the floor which you'd have thought they'd of noticed seeing they had it for over a week, anyway they got the ECU fault sorted, took it for test drive and seized the engine (obviously forgot to check the oil). They washed their hands of the whole situation and admitted no responsibility whatsoever, leaving my mate severly out of pocket. He tried to take legal action but was told that he stood no chance and would just be a waste of money on legal fees