It could be due to transient interference from a rogue radio frequency transmission that somehow multiplexed with the IF signal from your individual rolling code demux causing the relay connected to your door locks to activate as if you pressed the keyfob button.

 

or it's a safety feature for noobs who don't lock their z

 

yea, its happened to me before...04 touring... luckily i've always had the keys in my pocket... maybe our Z's are trying to tell us they'd rather stay where they are? ahaha.. its weird because it doesnt always do it, at least that i've noticed...

 

I have had the doors lock after opening the windows as well which I'm sure is just normal. The issue I have had is closing the door and then coming back and the door just gets stuck and locking and unlocking a few times is the only solution to get the lock to unstick :-(

 

Before I had the Z I had an F150 with shaved door handles. If I have the keys in the ignition, I roll my window down when I get out of it, just from experience. Such as, right after I installed my door poppers, I locked myself out a handful of times and had to crawl through the backwindow. And that window will just barely fit me.

I still can't trust too must technology.

 

I always push the unlock button inside the car before I get out of my Z.I dont know if it makes a difference but my doors have never locked on me.