Need help Parasitic draw

[mdefalco25]

So my car has shown indications of a weak battery. Four years old, clock is not keeping up and if I turn car off after driving within a minute I get the low voltage warning and battery icon. I took car into dealer today to replace battery. They tested battery and said it came back strong and stated I have a parasitic drain. Dealer wants to do a parasitic drain test for two hours, but before I spend the money wanted to see if there was anything I could try or look into? Really am shocked it is not the battery and now worried it is something worse. Any advice is much appreciated!

For background, it is getting colder in IL and that's about when I noticed this happening and car is a 2008 E92 M3 with 41,000 miles.

Thanks,
Mike

[mryakan]

Not much you can do. My guess is that it is a module that is not properly going to sleep/low power mode when you shut the car off.

[e66man]

I wonder what they consider parasitic draw for a BMW...6 amps? 10 amps? LOL

4 years though - and low mileage for this amount of time. It's probably time for a new battery. I've seen batteries get tested and they will pass a stress test but end up failing in everyday situations.

Like it or not, 4 years, maybe 5, is the limit of a BMW batteries useful life.