I know it's time for a new car, but what is the actual cause and is it worth repairing? Everything else is fine. Where can I buy a cheap Owner's Manual for it as well, it's the Coup.
i would think its a problem with your wheels. have them balanced and it should cure the problem. also while your at it an alignment wouldnt be a bad thing either. those 2 single things affect your tires the most, take a look at the tread on the tire, it can tell alot about its life.