I'm new to this site. I have one of the last running XG30s in the UK and it must be one of the best. However, it is 20 years old now and has a few electrical gremlins, most of which are minor, like self locking itself whenever it feels like it!
The worst problem I have is the gearbox keeps deciding to go into 3rd and staying there, causing the engine warning light to come on. We have traced this to the input speed sensor, so I bought a new one from the USA and had it fitted. It didn't work.
My mechanic has run out of ideas. The problem seems to be electronic as the gears otherwise are all fine when it is behaving.
If anyone has ever worked on one of these and dealt with a similar problem, I'd be grateful to hear how you solved it.