Servus, as many know, I’ve been falling for the N63 engine for about 10 years, a real hate / love. After I’m super satisfied with my N63TU3, like many others, I finally found a “weak spot”, which is just as interesting and important for you, since it may lead to extremely expensive consequential damage (wire harness + motor control unit + off-installation of the engine). In turn: In the last weeks I’ve noticed two things:1.) Farid (he has In one of his YouTube videos, he reported on a G30 550i in which the engine control unit was defective, since the thermostat coolant plug has penetrated the capilar effect into the engine control unit and destroyed it. As a result, the engine had to be installed off and back in order to replace the destroyed wire harness + a new engine control unit. Source: https://youtu.be/fuvC_lANB5Q?si=BgLfVExXUWLXXjXF at minute 7:09 see 2.) In the USA forums there have been reports that drivers of N63TU(X) vehicles received mail from BMW, in which they were informed about a “voluntary extended” warranty for the thermostat. The guarantee is then 15 years or 150,000 miles. Naturally only valid in the USA. Source:https://f92.bimmerpost.com/…/showthread.php?… Now I have been having the fun of “searching” my vehicle with the endoscope. I will now replace the thermostat and the water pump and examine the wire harness. I hope that the plug housing is still dry for me. If someone wants to do this for themselves, then please click here for:https://youtu.be/okVBrqZgmp0?si=oOQ5izRcf28VENaX I do not want to claim that every vehicle is affected, but it is worth it with a damage risk of easy 5k Euro, If someone wants to examine the plug on the motor control unit (in driving direction right), the plug is called A46*3B. Important, however, is that the thermostat is ok, or at some point it is changed for a current part, which does not have this error.