I ordered a throttle body for my XJR after having it changed before with an item from a local breaker because of the recurring "limited performance" problem. The one from the local breaker seemed to have a mind of its own, making the car feeling jumpy and dangerous at low speeds and eating rear tyres. The one from Auto Reserve completely transformed my car into a smooth to operate if needed to brutal if wanted gentlemen's express, making the cruise control operation smooth as silk in the process! Better than ever before in my five years' ownership and probably as Jaguar intended it. Furthermore, shipping was very quick, too.