Airbag light (e46)

So for no apparent reason my airbag light came on. (wasn't on when i stopped, got out, got back in and it was on.)

Shortly after starting the car the light goes off and then on and stays on. Ive read the codes and it pointed to the passenger side door airbag. Removed the door today and no obvious damage or reason for the airbag light to come on.

Any ideas or advise?

Thanks in advance!