My rear passenger side door popped and swung wide open as I turned onto my street today! Came home from work (30 minute drive), stopped to get mail - left driver door open, got mail, sat back down, put on seatbelt and drove about 100 yards home. Turned twice and on second turn I heard the mechanism 'pop' and the door swung completely open, I nearly clipped a parked car. I had to get out and close it. I was going very slow, there were some kids playing there - less than 10 mph. Nobody has been in that seat for a week. Worried now, what if I have a grandkid sitting there?
Yow, definitely contact service right away. Tell them the date/time of the incident, as best you can remember, so they can look at the car's log recordings.