Hi All - I've searched some of the other forums and come across this as an apparently not-uncommon issue with E90s; wanted to see if there was anyone else in the area that had experienced anything similar? Issue started when the iDrive Nav screen went on the fritz - shut down once while driving, then came back on later with seemingly no issue. A few days later, shut down again and never came back up. Of course, with iDrive, this means just about everything is uncontrollable - no warnings messages, no PDC, no radio, no nav... but car still running fine. We took it into local shop who replaced the battery and one of the inline computers, which was apparently broken; that didn't fix the nav screen so they were recommending replacing the DVD computer. Since the DVD system had been replaced not a year earlier and should still be under warranty, had them put it all back together with the iDrive still not functioning to take it back to the dealer for what would hopefully be warranty work. But then, before we could get it up to the dealer, it turned into a complete brick after about a week of sitting in the driveway. Thought maybe the battery was just dead, so tried to charge it overnight, still nothing. No central locks, no lights, not even attempting to power on when inserting the key. Checking e90post it seems there is some potential issue with the fuse box and battery cable that could be the cause. Has anyone else experienced or seen something similar? Seems like the recommended service for it is to replace both -- inexpensive parts, but very expensive labor since basically the whole passenger side appears to need to be taken out to run the replacement cable. Any thoughts or help would be greatly appreciated!
Thanks for the response. Yes; battery was registered to vehicle. It had seemingly worked fine for a couple of weeks following the battery replacement. Turns out the CCC was bad and had completely drained the battery and it wasn't taking a charge. We managed to get it started and it ran fine to get to the shop. At the shop, we realized that the DVD system was continually cycling when the car was not running, you could hear the DVD cycling on and off. In order to get it to stop I went through the fuses related to radio/nav and found fuse #31 got it to stop so it wouldn't kill the battery. This apparently saved me several hundred dollars of diagnostic time from the service center and pretty much meant the CCC was shot. Good to save the diagnostic dollars, bad to replace the expensive computer. But, with that done, all seems to be working now.
