u/Dr1ver4

Hi all.

I need to validate my conclusions on a fault I've come across on my relative's i3 120Ah fully electric.

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The symptoms were that the window and sun roof sporadically opened when the vehicle was parked.

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Being almost 10 years old, and a internet search describing the same symptoms, the 12V battery was replaced today. I've also reset the battery management system and replaced the key fob battery in the same go.

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After replacing the roof and window opening was no longer as sporadic as before.

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However:

- the key fob does not lock nor unlock the car with the buttons on the fob.

- the only button that semi-works is the frunk button. When that is pushed the door unlocks and open the windows and sunroof. Frunk does not open.

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When the car is unlocked with the frunk button, the car won't start. I have to push the frunk button once again and the car starts.

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The proximity door lock/unlock apparently works fine. When the car is unlocked with the proximity, you can start the car as normal, without any extra fob-button-pushing.

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My relative is going to find the spare key and test it, but until he finds it my theory for now is that the key fob is wonky and probably has sticky buttons.

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Has anyone experienced anything similar?

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