I have a bj 2001 singapore, all the shocks were changed, the bearings were changed, engine mounts were changed, but there is a humming sound that sounds like bearings especially when going down an incline. What could be the cause of this?

Hey guys, hoping someone can help. My driver's door in my M3 won't open. It just stopped randomly one morning and won't respond to alarm-remote or key. Two straighteners opened it up from the inside and gave up because the lock is encased in something they can't reach. A couple of alarm installers told me they couldn't help either. Anyone had this problem and/or can recommend someone who might be able to help with the problem? Thanks in advance.

Had to buy the entire lock/actuator assembly....