Yes the strange noises start coming after you get the paneles removed for installing central locking or security alarm. But even without it strange noises are too common. Remove the panels from the door making noise and then drive to find out what's causing the noise, it can be cheap metal wires and hinges attached to locks that can cause unpleasant disturbing noises. If no noise is detected then door panels must be installed properly, I hope the problem would be resolved