Our 1999 jaguar xj8 has had numerous throttle body failures. it has been replaced by jaguar and i have had to have it replaced twice. the problem with failure is that it causes a stability control failure which causes the car to be uncontrollable. in fact, my wife hit the edge of our garage entrance way do to it;s failure. i have contacted jaguar on several occasions by letter, email and phone and they appear to be unconcerned and suggest that i continue to replace the throttle body once it goes bad. this is a real safety issue and requires the attention of your office. *tr