Mazda CX-9 This larger SUV adds a V6 option, as well as more cargo room, to the CX-7 option.

Metal on metal

Old 01-01-2019, 10:20 AM
Junior Member
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Join Date: Jan 2019
Location: Kentucky
Posts: 1
Default Metal on metal


So I had my rear brakes and rotors replaced on my 2010 cx9 this summer. About two months ago I started hearing a metal on metal noise when in reverse, only when the wheels were cut to the left. Took it in, the shop said thereís no problems, everything looks good, probably just some moisture. Now when I back up the noise is always there but wayyyyy louder. Like it can be heard inside my neighborís house. Itís there in any wheel position, slightly muffled when the brakes are applied. My first thought was calipers because thatís the only time Iíve heard a noise that bad but again, Iím being told thereís absolutely no problems.

1. Someone please tell me this isnít normal.
2. Any ideas?
Old 01-04-2019, 12:10 PM
Join Date: Jun 2016
Location: Washington, the state
Posts: 86

It can be something as simple as a pebble caught between the back plate and the rotor. Try taking off one wheel at a time for a good look. They all should look similar--smooth shiny, maybe slightly uneven rotors, and nothing loose when you wiggle it.
Old 01-05-2019, 04:04 AM
Super Moderator
Join Date: May 2012
Location: Queensland Australia
Posts: 3,552

Get your wheel bearings checked by a competent mechanic. Cx9s are common for front wheel bearings.

Also get them to check, clean & adjust the handbrake shoes.
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