Thanks for that johnny! Theyre like an independant garage but its not a back street 1, like bosch service approved or summit like that. Just been down there to pick the car up and theyre sticking their story. I rang vauxhall before i went aswell and they said you could cause damage to a sensor aswell so i went down and told them, and they STILL denied it so i told them im gonna get a written confirmation off vauxhall saying it can be damaged as they are saying its impossible to damage it, and when i do they can replace it free of charge because when i asked the price of this part off them it was £115, so they reckon!