Supertech have repaired electronics on two Porsche cars I have owned. Firstly three years ago an amplifier that was wet This I removed and sent to them. It was repaired promptly and returned to me. It is still going strong now.
This week the PCM unit in the Macan stopped working and was blowing fuses. Porsche assessed the problem and said the unit had to be replaced at a huge cost. I contacted TJ at Supertech who said bring it around, they removed the unit, repaired it the next day and reinstalled it the following day at a fraction of the Porsche replacement cost. I would highly recommend Supertech Electronics