Do you have Mazda cx-7 that is making humming noise as soon as you start drive it? It could be 3 problems from Cx7 FRONT WHEEL HUB
Bad tires which you can rotate the tires from front to back and test drive it to see if you can hear the noise. If you hear little, just replace the tires at any local shop
ball bearing=) you can buy Wheel hub assembly or wheel bearing replacement at any auto parts store like Advance, Autozone or others and call a local mobile mechanic auto car repair service that will come or travel to you to come to fix it at home, job or business location near me
If you need alignment =) You will have to go to a shop because the your vehicle has to be on lift.
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2007 CX-7 Engine noise on start up
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