I've been getting a thumping sound from the front passanger side of my car when going over bumps on the road, no matter how small. This sound is not apparent on the driver side. I was wondering if this cound be a bad bushing somewhere on the passanger side. I'm taking the car in to have pads ad rotors done in the next week or so, but I wanted to get you guys opinion. Its not a very loud noise but noticable. In case its relevant the car has 90k miles.