Hi, we had an earlier one that would sometimes just cut out in fast lane. I fitted new throttle body & it cured it,seem to think Jag were covering a lot of cost,local dealer wanted 850 quid for new one but another dealer 100 miles away who I'd never dealt with before supplied one for 180 quid so don't know what all that was about but it fixed it. Don't know about wiring kit seem to remember just fitting new body,maybe earlier ones needed whole throttle body & later ones just need a wiring/connector mod???

Matt