Brake issues, continued - Mazda 6 Forums : Mazda 6 Forum / Mazda Atenza Forum
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post #1 of 6 (permalink) Old 07-09-2018, 09:13 AM Thread Starter
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Brake issues, continued

I've owned my 2014 touring for about a year now. One of the first things I did was to replace the front brake pads and rotors due to a pretty severe shuddering under braking. I've read about people having this same shuddering even when the cars were newer at less than 30k miles.

So anyway, I've put just under 20,000 miles on the these new pads and rotors. Yesterday, the wife and I took a day trip to the mountains of NC and the brakes got a bit of a workout. Once they got warm I was getting shuddering again! This is with aftermarket Raybestos ceramic coated rotors. I'm not terribly hard on brakes, but I do bed them in when first installed. I am certain this shuddering isn't from pad material buildup or anything like that.

I am really curious what is causing our rotors to warp so easily? Fortunately, these brakes are super easy to work on and I can swap rotors quickly, but <20,000 miles is absurd. I'll go with some el cheapo rotors from RockAuto next and see how long they last.
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post #2 of 6 (permalink) Old 07-11-2018, 12:40 AM
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I have my 2016 for 41,000 miles. Changed the original pads at 25,000 miles, no warp on issues. I drive fast and brake hard. I did bed them in after I got the car. Replaced the pads with Wagner ceramics. No issues.
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post #3 of 6 (permalink) Old 07-11-2018, 02:29 AM
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post #4 of 6 (permalink) Old 07-11-2018, 07:34 AM
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Yep. I've written on this here, and how to avoid it, several times.

In virtually EVERY case judder is NOT caused by a warped rotor. It's caused by improper brake bedding-in before heavy use, resulting in uneven transfer of pad material to the rotor.
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post #5 of 6 (permalink) Old 07-11-2018, 09:05 AM Thread Starter
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Thanks guys. I know these rotors aren't warped and it has to be uneven pad material deposits. However, I did bed these suckers in hard after installation. Same process I've done on all my cars and bikes since I started changing my own brakes about 20 years ago. Maybe I didn't let them cool properly afterwards, who knows. Never had this kind of shuddering after less than 20k miles on any car I've wrenched on myself though. So combined with the unusually high number of folks complaining about the same thing makes me wonder what else is going on here.


Regardless, rotors are cheap so it's easier to just replace them.
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post #6 of 6 (permalink) Old 07-17-2018, 07:23 PM
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Quote:
Originally Posted by tickerguy View Post
Yep. I've written on this here, and how to avoid it, several times.

In virtually EVERY case judder is NOT caused by a warped rotor. It's caused by improper brake bedding-in before heavy use, resulting in uneven transfer of pad material to the rotor.
If it is due to improper bedding-in, why does it seem to happen at a higher frequency with this car than other cars?
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