About my brother's Corsa 2006 1.2 twinport. he only has one key. Today he was out on a countryside walk. He dropped the key and a red plastic bit came off which he put back on. When he got back to car it would not start. Called AA. AA said that he has lost the immobiliser chip out of the key when he dropped it. It could not be found. They took the car back to his house, about 20 miles. But of course it can't be used. How easy is it to fix this? I of course realise it's not easy otherwise it would defeat the effectiveness of the anti theft element of having an immobiliser chip in a key. So can anyone say what the best course of action is? (don't say scrap the car, it is a bit scruffy but goes well and is reliable and has 11 months MOT). I assume it needs a professional of some sort - can anyone reccommend some in Brighton area to sort it. Anyone know what sort of cost this might be?