general problems of the 2004 BMW Z4

Reoccuring issue: -door locks not functioning by remote or central button -wipers not functioning -trunk release not functioning by remote or button -windows not functioning -lighting of interior not working, to include gauge cluster -top not functioning issues intensify on days of low/higher temperatures. Seems to reset by disconnecting battery and reconnecting after several minutes. Issues points to gm5 module being faulty/failing this is not discovered until you start the car, seems to be a random occurrence, but happens at least once weekly. Sometimes it is multiple times a day.

Gm5 module fail. When the gm5 module fauls windshield wipers won't work (this could be a big problem if it rains!), interior lights won't work, windows won't go up or down, no alarm functions and of course no automatic door lock control (doors can manually be locked and unlocked as long as the double lock is open. ).

I left my BMW in the sun all day and now my locks wont work. Many resources link this problem to the gm5 which controls the lighting and locks. Bad locks can be a safety and security issue on parked cars but also for moving cars as children may open vehicle doors in traffic.

Passenger's airbag indication light is malfunctioned. The indication light of passenger's airbag shows always off. Therefore it can't tell the airbag is on or off.