After owning my CX-3 GT for a few hundred kms, a vibration developed and is constant from 40 kmph and up. It is felt through the steering wheel. It does not get worse but is always there. It is occurring on both the stock 18 inch wheels and 16 inch winters. Mazda can not find anything wrong. It has been in twice. They tried balancing, checking alignment and everything was good. I'm getting frustrated with this... first new car and problems within a month of ownership. Any opinions, thoughts? I like everything else about the car but feel if a resolution is not in sight, I'm going to take the car back and give them the keys.