MY BMW 328 CI AUTO SE 1999 STARTED TO CLICKING OR LIGHT THUMBING NOISE FROM BEHIND UNDER DRIVER SEAT AT REAR BUT I LOOKED BUT CANT SEE ANY THING SO WHAT WRONG WITH IT AND IS IT AFFORDABLE TO FIX

__________________
This post was auto-generated based upon a question asked on our tech article page here:

Not sure what it is. I would inpect the seat motors.

- Nick

I heard the same thumbing sound from behind the driver seat and the sound goes faster when the car goes faster. The tires weren’t flat but I am suspecting a bad tire. My friend who is a mechanic, suspects a bad tire or broken belt. He also suggested that I also check that the lug nuts are tight. But I am not experiencing a sloppy driving though. I guess I should have the rear checked? What do you guys think?