2001 BMW X5 Q&A
2001 BMW X5 Question: whats it's mean when a transmission failsafe program from bmw x5 2001"
possible internal trans issue or module problem,seek a free diag at aamco the shop price and diag - globalhelper
When I had this problem, it was because my alternator was faulty. I replaced the both alternator and the battery and never had that problem again. - danlb
I'm having the same problem with my 2005 bmw x5. I've replaced the alternator and battery and still get that fault. I've hooked up a voltmeter and drove around till the fail safe warning comes in and I've noticed my voltage spikes to 17vdc plus. There may be a problem with the ecu. Might want to check it out. - Albeed123