Recently had my mot ( 3 weeks ago) failed worn tyres and new pads/disc at front all sorted now but noticed a low frequency humming coming from back of car when rolling. Stationary the car sounds sweet but when rolling sounds like a Lancaster bomber. Hiked up both rear wheels and gave them a spin drivers side spins fine but passenger side sounds like there's a tiny object like a small piece of metal rattling about. Could this be a sign of a failing wheel bearing and should they have spotted it during the mot?
Wheel bearing broblem???
