I have a 2001 Jaguar X-Type and recently it has become very reluctant to lock using the key fob. Fortunately, it opens the car with no problems. I assumed that after eight years it could do with a new battery. I called at a Jaguar agent to buy a new fob battery, but the parts manager refused to supply one. He maintained that the only solution was to order a new fob (£80) and to have the locking system reset by a Jaguar dealer. I have a second fob that is rarely used, and this works no better. I later called the service department of my local agent who advised that I would not need a new fob but he would need to have the car in for half a day to track down the problem. I bought new batteries, but the problem persists. What would be the difference between a new fob and the "nearly new" fob I keep as a spare? Was I being ‘fobbed off’ or is spending £160 for two fobs the only solution?