windows rolling down when car is turn off

Asked by Daddyboy1 Sep 22, 2023 at 07:48 PM about the 2016 BMW 5 Series 535i Sedan RWD

Question type: General

I have a 2016 BMW 535i I when out of town for three days . Check my windows  
before I left. the key fob was in a safe place not in my pocket, When I returned
home I found all four of my windows halfway roll down. My key fob was with me
in a safe place. Could this be of moisture ingress to the locking and windows
ECU inside the driver's door?

2 Answers
307,635

Gene answered 8 months ago

Could be moisture or RF interference from someplace else. Wrap your fob in foil and see if it happens again. If it does then the system will need to checked and possibly shielded from external interference. If it stops then you have a problem with your fob.

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203,365

Ed92626 answered 8 months ago

Cars today use a lot of electricity when not used. A weak battery, from the car sitting for as little as three days can cause all sorts of anomalies, like sensors malfunctioning. Check battery condition. You might invest a few bucks into a battery tender that you can leave on the car when you travel.

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