Any wheel bearing issues? - Mazda 6 Forums : Mazda 6 Forum / Mazda Atenza Forum
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post #1 of 11 (permalink) Old 07-20-2018, 07:18 PM Thread Starter
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Any wheel bearing issues?

My wife's 2015 6 has about 55k miles on it, and while driving it for the first time in the while with the radio off, I'm hearing a groan coming from the left front that varies by speed. It sounds similar to a bad front wheel bearing that I've had in the past on a Volkswagen, but I'm not 100% sure. Before I start throwing parts at the problem, has anyone had a similar issue? I searched here and on Google, and I'm not finding anything to indicate that this is a chronic problem with these cars.
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post #2 of 11 (permalink) Old 07-20-2018, 07:40 PM
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When I've had a wheel bearing go bad (but on a 2013 Nissan Altima) it was more of a whining sound than a groan. Not sure from your description what else to check.
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post #3 of 11 (permalink) Old 07-20-2018, 10:34 PM Thread Starter
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Originally Posted by Bill_k View Post
When I've had a wheel bearing go bad (but on a 2013 Nissan Altima) it was more of a whining sound than a groan. Not sure from your description what else to check.

Definitely a groan/grind. I didn't notice anything out of the ordinary when I did the brakes a couple weekends ago to make me think there was a bearing issue. I found a video on YouTube with a good method of testing the bearings if you're not getting obvious slop.
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post #4 of 11 (permalink) Old 07-21-2018, 01:53 AM
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I work in a major Mazda dealer. To the best of my recollection, we have done no wheel bearings, front or rear, on the 3rd Gen cars.

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post #5 of 11 (permalink) Old 07-21-2018, 07:06 AM Thread Starter
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Originally Posted by dave in edmonds View Post
I work in a major Mazda dealer. To the best of my recollection, we have done no wheel bearings, front or rear, on the 3rd Gen cars.

That echos the lack of search results on the topic. There is a first time for everything I guess. I'll probably find out tomorrow, when I'm home and can put the car up on jacks. But first I'll have a couple hours of driving to see if I can further pinpoint where the noise is coming from. Right now I know it seems to be coming from the LF, it is speed dependent, but not RPM dependent.
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post #6 of 11 (permalink) Old 07-21-2018, 10:58 AM
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Quote:
Originally Posted by Jimal View Post
That echos the lack of search results on the topic. There is a first time for everything I guess. I'll probably find out tomorrow, when I'm home and can put the car up on jacks. But first I'll have a couple hours of driving to see if I can further pinpoint where the noise is coming from. Right now I know it seems to be coming from the LF, it is speed dependent, but not RPM dependent.

No change when gently applying the brakes as well...? Check the brake backing plate to make sure it wasn't bent when you did the brakes and that no stones got stuck during driving.


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post #7 of 11 (permalink) Old 07-22-2018, 09:29 AM Thread Starter
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No change when gently applying the brakes as well...? Check the brake backing plate to make sure it wasn't bent when you did the brakes and that no stones got stuck during driving.

It isn't that kind of noise. There is, however, a slight vibration through the pedal and wheel on very light braking, which is a bummer since there are less than 500 on the new brakes. I'll do some troubleshooting today.
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post #8 of 11 (permalink) Old 07-22-2018, 10:48 AM
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Quote:
Originally Posted by Jimal View Post
It isn't that kind of noise. There is, however, a slight vibration through the pedal and wheel on very light braking, which is a bummer since there are less than 500 on the new brakes. I'll do some troubleshooting today.
Sadly, I think you've found where the problem lies.

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post #9 of 11 (permalink) Old 07-22-2018, 10:52 AM
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Pretty unlikely to be a wheel bearing at 55k. Now if you had well north of 100k miles, quite possibly, especially if there's a fair bit of rough-road driving involved (e.g. gravel roads, etc.)

Modern "cased" wheel bearings are extraordinarily robust; occasionally you get one that's bad from the factory, but not often. The usual cause of failures come after the FIRST one eventually wears out and stems from improper technique during the replacement operation which damages the replacement when it's installed, and then it quickly fails too (usually in the 20-50k mile range.)
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post #10 of 11 (permalink) Old 07-22-2018, 03:36 PM
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@Medallion68 had nearly the same issue on his 2016 diesel at only 35,000km and it was the wheel bearing in his case.
https://forum.mazda6club.com/newbie-...ml#post5003146
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