I had my serpentine belt replaced at the dealer last month, and afterwards I noticed a vibration in the steering wheel and in the brake pedal when the AC compressor is on. Im planning on taking the car back to the dealer and asking them to look at it again, does anyone have any ideas what could be causing this? Belt tension setting?

Thanks!
Alex

 

Well, I guess I could imagine the belt affecting the PS, but not the brakes.

Are you sure the symptoms are related? Did they by any chance do an inspection of your brakes at the same time? It sounds like it could even be a possible brake judder issue, and the AC is coincidental.