I have a 328i (1999). The tires aren't even a year old but when I'm driving along at a slow speed (5-60mph) it sounds like the rear left driver side tire is warped. I thought I had a flat tire it was so bad. I looked for a nail or screw in it and found nothing. Rubbed my hand over it and didn't feel any lumps either. I checked the air pressure for all and they're at 35lbs. I did have a problem with that same wheel smoking at one point and getting hot but that seems to have stopped; still warmer than the other tires, which don't heat up at all, but not hot. I have a check engine light that codes say it's the O2 sensors I have to get serviced. The check engine light goes off and on after running for a while, say 10 miles at high speed. Any ideas? Thanks!