Driving along yesterday on the main road and all of the sudden the interior lights go on and I hear the chime.

I looked down on the dash and my right passenger door was open.

What in the world?

Has anyone else had this issue and what was the cause/issue?

I know for a fact the door was shut tight, because I closed it myself.

flash3 wrote

Driving along yesterday on the main road and all of the sudden the interior lights go on and I hear the chime.

I looked down on the dash and my right passenger door was open.

What in the world?

Has anyone else had this issue and what was the cause/issue?

I know for a fact the door was shut tight, because I closed it myself.

You didn't by any chance have cold temperatures (below zero)?

This happened to me once while it was freaking cold. The door was frozen tight and I couldn't open it. What happened was that while I've tried to open the frozen shut door, I actually opened the lock. The handle went back as normal when I released it, but the locking system stayed open because of the frost.

When I was driving, the temperature was rising in the car and door. The frost in the door lock disappeared and it opened during driving. I was at a stopsign then, so everything was ok

flash3 wrote

Driving along yesterday on the main road and all of the sudden the interior lights go on and I hear the chime.

I looked down on the dash and my right passenger door was open.

What in the world?

Has anyone else had this issue and what was the cause/issue?

I know for a fact the door was shut tight, because I closed it myself.

This happened to me and it is supposed to be a safety feature according to the dealer. You can refer to my thread http://x3.xbimmers.com/forums/showthread.php?t=642647