Brake pedal pulsates when braking

Tiny
DIVIDES
  • MEMBER
  • 2010 TOYOTA HIGHLANDER
  • V6
  • 2WD
  • AUTOMATIC
  • 183,000 MILES
It's not the same pulsation you usually get when the rotors are bad. I have seen this on many Toyotas and Lexus and cannot figure it out. I installed new rotors and brakes and same results. This one here when applying the brakes at the lights to a stop you feel a pulse in the front, steering does not shake, rear brakes also new. I also regreased all the pins and they move freely.
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Sunday, April 11th, 2021 AT 9:55 AM

3 Replies

Tiny
KASEKENNY1
  • EXPERT
Just to be clear, the pulsation is felt in the brake pedal or in the floor board?

If the pulsation is in the pedal then I suspect you have excess runout in the hub or rotor.

I attached the process from the manual on how to check this but when you put the rotors on, did you clean the hub with a friction disc of any rust?

If not, then this runout will cause pulsations similar to a warped rotor.

Please review this and let me know what questions you have. Thanks
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Sunday, April 11th, 2021 AT 7:24 PM
Tiny
DIVIDES
  • MEMBER
I am sure it's felt in the brake pedal, and yes I cleaned the hub as much as I can, I always do. But with Toyotas it's almost always never the rotors that are bad. I will check the hub.
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Sunday, April 11th, 2021 AT 7:40 PM
Tiny
KASEKENNY1
  • EXPERT
Agreed. If you have a small amount of runout on the hub then that will be amplified as the surface diameter increases.

Let us know what you find. Thanks
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Sunday, April 11th, 2021 AT 8:14 PM

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