Ive only had my a4 1.8t for about two weeks and it's had to go back twice lol. First time was because the water pump failed, now it's got to go back because the timing is out and the speed sensor has gone. Ive got the engine light and epc light on, my brother put the laptop into it and brought up the error codes and i emailed them to the dealer. I done this as i dont trust the dealer anymore because my brother said that they have not changed the cam belt when doing the water pump. What i want to know is there are loads of cam belts on ebay from £40 - £175 i done understand why there is such a price difference. Can you trust ebay or shall i just go to audi for the belt kit or can i just get the belt. What is best to do.