I have been getting this increased battery discharge message at startup on and off for months. There is no problem starting, but it resets the clock and trip odometer every time it happens. I have seen cases online where it happens after the car goes to sleep (68-70 minutes) but this is happening after just a few minutes rest or overnight - timing seems completely random. Answers that i have seen for the above mentioned cases were that aftermarket electrical appliances were possibly not hooked to the battery correctly and need to be removed or reinstalled. Unfortunately as far as i know there are no aftermarket add ons. Not sure what to do on this.
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It's a pandemic among all BMWs. If I'd known about this problem a year ago, when we bought our first (and only) BMW, I'd have never bought one. Our car had the "Increased battery discharge" problem, the dealer played games and finally--after the fourth time we took it in (in 2 weeks) replaced the battery. Fast-forward nine months later, and the whole thing happened all over again. Chances are you're gonna end up buying a $200 battery every 9 to 12 months. And we're definitely NEVER again buying a BMW
