Drivetrain error message
2009 750Li - been in shop twice already for this problem in the last two weeks. Car suddenly starts running like half the plug wires have come off. Error message says Drivetrain problem.
30,000 miles. First service: bad air intake hose, designed to be too close to the manifold. Repaired, and then a few days later, problem returned.
Second repair, potentiometer replaced, and a lot of talk about computers and BMW being a high-performance car. Repaired. Next time I drove it, today, the problem returned again.
Cannot move the car when it happens, restarting sometimes fixes it. At end of 3 year lease, was planning to purchase. Having serious doubts about that, this car, competence of BMW repair staff, and, frankly, reliability of BMW technology.