If  your car overheats, it could be the head gasket inside engine ouch. cost you $1200 plus. If not, then it could be the brake pads giving off smell like burning rubber. Why in the earth does old or new tyre smells when wear and tear is normal ? It is possible that some moving part getting rubbed against the rubber or plastic items like wheel hitting Mud gaurd, off balanced radiator fan hitting it's casing ....