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Discussion Starter · #1 ·
I have a 2018 Mazda CX-5 GT. I hear a noise mainly coming from the rear of the car.

The noise to me sounds like it could be rear wheel bearing noise. I hope this isn't typical because it's actually quite loud and not something I would expect coming from a car with low miles. While it isn't unbearable I do notice the constant sound while driving. I have also considered maybe its the tires since these tires are original on the car.

Anyone else having these issues?
Thanks
 

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Its kind of hard for anyone to diagnose a cars' noise when they can't hear it. I had a set of original tires go bad after just 32 thousand miles but again don't know what kind of noise you're hearing.
 

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Discussion Starter · #3 ·
Its kind of hard for anyone to diagnose a cars' noise when they can't hear it. I had a set of original tires go bad after just 32 thousand miles but again don't know what kind of noise you're hearing.
I certainly understand that. I almost recorded it to post as a sound file. I suspect the tires are at least partially to blame since when I pull off from a stop sign they squeal with no effort. They simply aren't grabbing the road.Plenty of tread on em.
I'm pretty cheap so I might wring a few more miles out of the tires and put up with the noise for a little while. I think there might also be some slight bearing noise. It doesn't help that for 2019 Mazda said they made the car interior more quiet. I guess it helps if you bought a 2019. I have a 2018.

I might try to take it by a local tire center here and see if it's the tires, but we know where this will end up- "yes you need tires". It's like going to the donut shop and asking them if you should buy a donut.
 

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"yes you need tires". It's like going to the donut shop and asking them if you should buy a donut.
LOL that is a good point! My Mazda dealer were the ones that told me to get new tires. Most mechanics can also use a device to listen to your bearings etc. to see if they are making noise. Don't skimp on your tires if you live in a high snow area like I do. Be safe!
 

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One suggestion might be to do a tire rotation (move the rear tires to the front; fronts to the back) and make sure the tire pressures are at or a bit over recommended pressure. Then go for a test drive. If the noise moves to the front, you might have a 'cupped' tire. When you get new tires you should get an alignment. If the noise stays at the rear, then you'll need to investigate further whether its a bearing or a brake rotor/disc noise. Good luck!
 

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Discussion Starter · #6 ·
Well I got a screw in my rear right tire. Thankfully I was able to find the screw and I have an air compressor at home. One thing I noticed is the rear jack lift point is hard to spot and it doesn't look particularly sturdy. Hopefully I can simply get the tire plugged.
 

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Well I got a screw in my rear right tire. Thankfully I was able to find the screw and I have an air compressor at home. One thing I noticed is the rear jack lift point is hard to spot and it doesn't look particularly sturdy. Hopefully I can simply get the tire plugged.
I got a nail in my tire a few weeks ago and it was plugged by a local mechanic friend of mine. First time I have ever done the plug thing but it seems to be holding up just fine.
 

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Discussion Starter · #8 ·
I got a nail in my tire a few weeks ago and it was plugged by a local mechanic friend of mine. First time I have ever done the plug thing but it seems to be holding up just fine.
Glad to hear you were able to get it fixed.
I almost went to Auto Zone and bought a plug kit, but time was precious so I paid for the convenience of getting it done right down the road within a few hours of dropping it off. 35 bucks worth. Probably took them 15 minutes.
Still much less than a new tire. Since cars went to aluminum rims and TPS sensors I have always had issues with small leaks. I don't often pick up a drywall screw though. Went in straight almost like someone stood the screw up under the tire. I don't really believe that's what happened. Should be fine after the repair.
 

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I have a 2018 Mazda CX-5 GT. I hear a noise mainly coming from the rear of the car.

The noise to me sounds like it could be rear wheel bearing noise. I hope this isn't typical because it's actually quite loud and not something I would expect coming from a car with low miles. While it isn't unbearable I do notice the constant sound while driving. I have also considered maybe its the tires since these tires are original on the car.

Anyone else having these issues?
Thanks
I just had the entire rear differential replaced on my 2017 CX5 @ 72K. $3K repair! I was told a seal broke, and then it was just a matter of time. I had noises from the rear too. Initially, I thought it was brake pads that were rubbing, then I thought it could be rear wheel bearings, but it turned out to be grinding from the rear differential. Very disappointing!
 

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Discussion Starter · #10 ·
Thanks @BernieAndersen for the FYI. This makes me want to crawl under the car and take a look at my differential.

Sorry to hear of your misfortune. I hope this isn't my issue. FWIW I don't have grinding. My noise more like a hum. It isn't terribly loud but I noticed it as being loud compared to my other cars.

-Tim
 
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