For some time now I have had a misfire problem making my VVC engined car a bit jerky while running. I would have to press the gas peddle to stop it jerking. Well after a couple of posts on here and the F Reg I was told by someone else that they had a problem very much the same as I had and it was cured with a new cam sensor. So I set about changing my cam sensor To unplug the sensor you push the top of it in.As you look at it there is a bit proud . Here are some pics of the procedure.
You will also need a small 7mm spanner, an 8 mm spanner and a 10 mm spanner. The sensor is on the opposite side of the engine to the 18i model but the procedure is the same.