I have a humming sound when driving?

2008 MAZDA CX7
3.2L • V6 • TURBO • AWD • AUTOMATIC
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RICHARD71
  • MEMBER
  • 2 POSTS
The faster you go the louder it gets. My wife took it down to have the oil changed and they said that the throttle body had a lot of carbon build up. I got some cleaner and cleaned the throttle body and that didn't get rid of the noise. I also checked the rear differential and the fluid was low. I changed the fluid and noise it still there. Anyone have any idea what is could be.
May 23, 2015 at 9:42 AM
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WRENCHTECH
  • CERTIFIED EXPERT
  • 20,761 POSTS
It could be a bad wheel bearing, irregular tire wear or differential bearings. Does it change when you go into a corner? I have seen bad bearing hubs cause this.

https://www.2carpros.com/articles/whirring-sound

Please run down these guides and report back.

May 23, 2015 at 11:08 AM
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SAM.SMALL
  • MEMBER
  • 2 POSTS
Yep the front bearing were out in my car cost me $132.00 to get the bearing and fix it.
Dec 5, 2019 at 11:22 AM
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