QX70 brakes vibrations at high speed

A forum for lovers of Infiniti's hot-rod crossover, the FX! In 2014, all FX models will be named Infiniti QX70, in line with Infiniti's new naming structure.
quintard
Posts: 8
Joined: Sat Jun 03, 2017 8:31 am
Car: infiniti QX70 3.0D

QX70 brakes vibrations at high speed

Postby quintard » Tue Aug 04, 2020 11:00 am

hi,
i am french and forums are very poors in france for infiniti cars.
i have vibrations in brakes at high speed.
i want to know if it is a current problem on QX70 or others infiniti cars.
can you help me
Dany


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Ilya
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Joined: Fri Apr 23, 2010 11:20 pm
Car: 2011 M56x but I spend a lot of time on my 2015 Kawasaki Vulcan S. Former owner of a 2007 M35x. Also take care of my wife's 2016 QX60.
Location: Albany, NY
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Re: QX70 brakes vibrations at high speed

Postby Ilya » Tue Aug 04, 2020 12:22 pm

Welcome. You probably have warped rotors if it only happens under braking. Either have them re-surfaced or change the rotors (and pads). In the US, you can get a set of 4 rotors and 4 sets of pads for under $200 USD for a Q70.

Also, moving this to the correct forum.

quintard
Posts: 8
Joined: Sat Jun 03, 2017 8:31 am
Car: infiniti QX70 3.0D

Re: QX70 brakes vibrations at high speed

Postby quintard » Tue Aug 04, 2020 12:49 pm

j'ai du mal a y croire car je ne freine jamais tres fort.

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ibc
Posts: 179
Joined: Tue Aug 11, 2015 1:17 pm
Car: Infiniti M56x

Re: QX70 brakes vibrations at high speed

Postby ibc » Tue Aug 04, 2020 7:45 pm

I agree withe Ilya, This is a symptom of warped rotors, or inconsistent thickness of rotors. Your rotors must have worn irregularly, somehow. Perhaps the steel was softer in places, and a bit harder in others? It happens. You can resurface them to make them uniform again, or else just replace the rotors with new ones. They're pretty inexpensive in USA, so we usually just replace them, which fixes the problem instantly.

madmanpauly
Posts: 35
Joined: Tue Dec 04, 2018 10:12 am
Car: 2011 Infiniti M56S

Re: QX70 brakes vibrations at high speed

Postby madmanpauly » Wed Aug 05, 2020 7:30 am

Driving through puddles with hot brake rotors can easily warp the rotors as well. Hard braking is not the only cause. I would have the rotors resurfaced or replaced. It's not a difficult procedure if you have any mechanical skills you could do it yourself.

quintard
Posts: 8
Joined: Sat Jun 03, 2017 8:31 am
Car: infiniti QX70 3.0D

Re: QX70 brakes vibrations at high speed

Postby quintard » Wed Aug 05, 2020 2:40 pm

petites indications:
1ere chose: j'ai fait remplacer le liquide de frein récemment parce qu'il était ancien.
2eme chose : pendant le confinement du covid, le véhicule n'a pas roulé pendant 2 mois et les disques ont rouillé.
je ne sais pas si cela a pu avoir un impact

madmanpauly
Posts: 35
Joined: Tue Dec 04, 2018 10:12 am
Car: 2011 Infiniti M56S

Re: QX70 brakes vibrations at high speed

Postby madmanpauly » Thu Aug 06, 2020 7:54 am

Shouldn't impact anything but good to keep up with fluids. I'd focus on brake rotors. Let us know how it goes.


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