BMW 3 E90 2005 onwards
Blown central locking fuse, seems a small item but a good revenue generator. Modified door locking motors are available, check and replace as required looking for the odd one out that is drawing more current than the rest.
Worn front suspension lower arms that cause excessive noise/rattles.
Premature wear within the steering rack causing rattles to be transmitted up the steering column.
Parking sensor failure, water ingress to the boot area filling the park control module (when fitted in the boot area) with water causing various other electrical issues.