I find with new cars that short term, they mostly run without fault, however, when they do get one of these electronic faults, none of the garages i bought from could do a repair. Nissan called out the RAC van after 5 attempts at fixing it. BMW spent 5 days with the car trying to fix a failed radio. Renault was a leaking water problem and it went back still leaking water after 3 years.
By far the best quality was Vauxhall and Volvo with no faults at all.
My boy solves a few electronic problems at his garage but can also call on a local electronic car fault wizard.