I have a fun new gremlin in the X5. The rear hatch opens at completely random moments during driving. You can hear the lock opening erratically.

Considering I had some issues during extreme wet weather with the hatch button not working for a while, I suspected the button. I took the unit off so see if it had any water ingress, but couldn't find anything obvious. The whole unit seems sealed so any exploration would be destructive.

Anyone had this before? Would you still suspect the switch or could I have a wiring problem? It happens stationary as wel as driving, so not movement-induced