recently, my abs kight has come on on my octavia vrs mk1. i took it into a local specialist and he has told me its the rear speed sensor. i went on the net and can get one for around the £20 mark. was just wondering, is it just a matter of changing it or does it have to be set up by computer after fitting?

am looking to sell the car as new vrs on its way, so any help appreciated.

just been out in the car and it gone off now. lol. hope it dont come on again now.