general problems of the 2002 BMW 325

When putting on seatbelt on both driver and passenger side the seatbelt will go in and moments later during driving it will unclique and come off this happens every once in a while not all the time. Just happens while the vehicle is in motion and stationary mostly while the vehicle is stationary. You can hear it click and sometimes I even pull it to make sure it is clicked in because of this problem and sometimes after I do that it will unclick, it happens mostly on the driver side but every once in a while on the passenger side not know if this happens in the rear seat belts.

While vehicle was in motion on a straight highway, the passenger in the right rear seat leaned forward, extending the shoulder seat belt from its retractor. The right rear seat belt failed to retract when the passenger sat upright and will not retract now that the vehicle is parked on level ground.