Picked up the car. The fault code read (he did not have GT1 or INPA) is EGS 32 Speed signal. He did not find any signs of harness issues.
ATF fluid is clear and at the correct level.
The recommendation is to go to the dealer.
2003 BMW 540i A M-Sport with factory Navigation and CD changer; winter package
1997 Toyota Landcruiser 40th anniversary edition