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Thread: Shudder under braking

  1. #1
    Registered Member

    Join Date
    May 2019

    Shudder under braking

    Hello, all

    So I replaced my stock pads and rotors up front back in November of 2018 with Power Stop brand pads and rotors. They've been fine up until about a month ago I started developing a shudder under braking. The shudder is pretty heavy at speeds above 65mph and goes away below 55mph. The feeling is a hard front end shudder, but it doesn't affect steering input at all. My wife says she feels it in the wheel, but I don't. I did not bed the brakes, as I didn't know that was part of the process. Every brake video and "DIY" guide I read never talked about bedding the brakes; however, I've also heard it's not necessary for street cars.

    Anyway, I've driven at least 2k miles since then. I thought that it might be the rear brakes, as they're pretty old. However, I did the "pull the e-brake" trick at speeds about 65mph and didn't get any shudder, so I'm wondering if it's the fronts. I read that if it's a warped rotor then it's better to just replace the rotors AND pads (as the pads will have worn unevenly) rather than have them resurfaced.


  2. #2
    Registered Member

    Join Date
    May 2019
    One culprit that I'm think it is: I may not have torqued the lug nuts properly. I may have over torqued them

  3. #3
    Banned Chris_Top_Her's Avatar
    Donated: $45
    CX Moderator

    '15 CX-5 Miata GT AWD w/Tech 2.5L

    Join Date
    Sep 2012
    San Antonio TX
    Might be warped. You could look at the pad to see if they have uneven wear

  4. #4
    Registered Member

    CX-5 AWD GT

    Join Date
    Apr 2017
    If the shutter is in the steering wheel when braking, itís front rotors. Iíd machine them as itís cheap and see how it goes

  5. #5
    Registered Member

    CX5 GT-R

    Join Date
    May 2015
    South-Central US
    Over torquing lugnuts trashes rotors. Btdt.

  6. #6
    Registered Member ceric's Avatar

    2017 Mazda CX-5 GT, 2016 Mazda6 iGT, 2014 Mazda3 sGT hatchback

    Join Date
    Jan 2008
    Northern California
    I always re-torque the nuts after coming back from dealership.
    Can't trust these airtools and people who use them.
    2016 Mazda6 iGT + Tech Pkg
    ....Sonic Silver Mica / Parchment
    2014 Mazda3 sGT hatchback
    ....Soul Red Metallic / Almond

  7. #7
    Registered Member

    2014 CX-5 2.5L AWD

    Join Date
    Mar 2014
    United States
    I have the same shudder issue, but it seems to come and go. Sometimes I feel it one day, the other I don't.

  8. #8
    Registered Member tibimakai's Avatar

    2014 Mazda CX-5 Touring

    Join Date
    May 2013
    Los Angeles-San Dimas, USA
    I have the same thing. My brakes are most likely do to be replaced, I'm at 53k.

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