Did mine yesterday, prepare for a girly answer!!!
Jack up front of car
Remove drivers side wheel
Take off plastic coverings on inside of wheel arch (couple of funny star head screw things and plastic studs on each half)
Open bonnet and remove yellow filler thing for the water bottle (single nut)
Look inside wheel arch and remove fixings for water bottle then, wiggle out bottle and motor is attached at the end.
Replace motor (couple of pipes and an electrical thingy)
Test it out and put it all back together again.
Shirley, August 2007
