My 2011 Mazda CX-9 is vibrating while driving

Without knowing more, your problem could be caused by quite a few different things, including wheel bearings, driveshafts, brake rotors and even worn suspension components. But a really common cause of a vibration at a particular speed is a wheel that has shed one or more of its little balancing weights.

Given the parlous state of this nation’s roads at the moment, hitting a big pothole is a pretty good bet right now. And the shock of that impact is a typical way for the wheel to shed its balance weights. These small, lead weights are added to the wheel when a tyre shop fits new tyres. The idea is to use the lead to balance the wheel so it spins smoothly. Lose the weight and you suddenly have an out-of-balance wheel and tyre and a vibration is a likely consequence. A good tyre shop will be able to check this for you.