One problem related to electric power assist steering system has been reported for the 2004 Jaguar XJ8. The most recently reported issues are listed below.
The power window on drivers side stopped operating while in the up position. Vehicle stalled on two occasions while driving at 35 mph and 65 mph. Vehicle restarted on both occasions, and the vehicle would vibrate severely while driving 50 mph. Consumer stated vehicle had been to the dealer 8-10 separate times, but problem recurred. The electrical sstem has problems. Radio changes funtions from am to fm to cd by itself without consumer input. Windows go down without the consumers input and will not close. Interior lights do not work when driving. Steering wheel gets heavy when driving at slow speeds. Tires become loud and rought at 19000 miles.