Originally Posted by Lazzer
Door lock actuators are dieing if not dead already, its a known issue with pre 08 E90's. Dealer should be able to fix this in under a day.
First time it happened to me was with the passenger door, while out on my wife's brithday. She had to crawl across from the driver's set in her little black dress. LOL.
Problem affects 08s too. Door actuators are a known issue with 3 series. Actuator is on the way out, power surge blows fuse. Replacing the fuse will fix it, temporarily, but it will probably happen again within 30-60 days. Costs about $500 for one side, $1,000 for both, if not under warranty.