Power Door Locks Not Working problems of the 2007 BMW 3 Series

Door locks would not open on 3 of the doors; had to crawl from backseat to front seat to start car. Once got home, had to crawl back out via the back seat. Extremely hazardous safety condition due to if there was an accident, myself nor my passengers, especially young children, wouldn't be able to escape. Took vehicle to local BMW dealer and he stated this was not the "1st" time he had seen this type of issue. Approximate cost is between $700 to $1,000 to fix. Contacted BMW customer relations and they are investigating issue.

Electric door locks failed on all four doors with no symptoms prior to complete system failure. Key fob and central locking system button inside car would not unlock any door. Doors would not open by pulling on interior door latch handles. The only way to enter/exit vehicle was by using key on exterior driver's side door to unlock the door, or through the windows. This seems like an extremely dangerous single point egress failure that could result in unnecessary injury or loss of life in emergency situations. I replaced the blown 15a fuse (#57) with a 20a fuse per si b51 19 07 twice. First functional test by pressing the central lock system button resulted in the new fuse blowing immediately each time. Further troubleshooting and repair will be necessary to resolve issue (likely by replacing faulty electro/mechanical door latch/lock/actuator mechanism).