How to reset BMW after power failure?
3 Answers
First, check the battery in the trunk to see if the root cause of the problem lies with the battery. If there is an issue, replace the battery. Check if there are any problems with the fuse box socket and wiring harness connector in the glove compartment on the passenger side. It may be due to incorrect contact between the pins on the fuse box socket and the internal circuit of the fuse box.
Last time my BMW had a power outage, resetting the windows was super crucial, otherwise the one-touch function wouldn't work. Here's how I did it myself: first, close the windows completely, then hold down the up button on the switch for about five or six seconds until you hear a click. The same steps apply to resetting the sunroof—just keep the switch pressed for a moment. A power outage can cause the car's electronic system to forget these settings because the system needs to relearn the positions after restarting. Don't worry, this isn't a big issue—it's quite common, and many cars have similar problems. After I tried it myself, opening the windows became much easier, no need to hold the button continuously. If you're unsure, it's best to check BMW's manual or contact a nearby repair shop—they can handle it quickly, saving you the hassle. In short, resetting restores daily convenience and avoids distractions from manual switches while driving.
When my BMW lost power, the window functions went haywire, but the reset method is quite simple. Mainly for the one-touch operation: first make sure the windows are fully closed, then hold the window-up button for about six seconds, and the system will automatically memorize the new position. The sunroof is similar—press and hold the switch during opening/closing to reset it. A power loss resets the vehicle control module, so the system needs to relearn the set points. After I reset it myself, it felt much better, and the one-touch function returned to normal. If you don’t reset it, you’d have to hold the button manually during long drives, which is inconvenient. I recommend trying this method—it’s basically universal for all BMW models and easy to perform. If the reset fails, there might be a wiring issue; it’s best to check the fuses or have a professional inspect it.
