Best start a new thread for this rather than high jack the other. Mines playing up in my late 99 TQS avant. fairly sure it's the modules, the light takes a while I go out when its cold, which from what I've read is the module.
Are they model specific, i.e. Tied to certain specs or engines? Or will any old one from a FL a4 do the job?
Do they need coding when changed?
Anyone got one for sale?