One problem related to transmission failure has been reported for the 2004 BMW 745.
Numerous warning lights including "possible transmission failure" and "loss of stability control" lit up on my 2004 BMW 745li. The vehicle lost its ability to accelerate, which extremely dangerous in the high traffic situation I was exepriencing on the highway. This failure is in additon to numerous warning indicator lights that appear intermiitenly in the vehcile and then reset themselves once the vehicle is truned off and restarted. The diagnosis by BMW was that the mechatronic unit on the transmission had failed (after only 70,000 miles, this is barely the break in period for these vehicles). The total repari cost was quoted at $5,000. The machatronics unit was replaced and seems to be working for now. Upon reading up on issues related to the BMW 745li it is amazing that no major recall has been initiated on its electricals, transmission, and computerized control systems. All of these seem like huge saftey concerns as the vehicle tends to fail while in traffic.