GS - 4th Gen (2013-2020) Discussion about the 2013 and up GS models

Have a problem: In Winter: feels like I have to press brake deep for clamping force

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Old 05-27-23, 09:31 AM
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hydrogenfu
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Question Have a problem: In Winter: feels like I have to press brake deep for clamping force

Car: 2015 AWD GS350

After I got new brakes/calipers (summer 2022) and fluid (summer 2021), specifically in the winter (live in snowy cold climate), it feels like I have to press the brake pedal very deep to get full clamping force on the brakes. And then as soon I let the pedal go even a LITTLE bit, the brakes immediately release and the car starts moving.

Anybody know what the issue might be?

Last edited by hydrogenfu; 05-27-23 at 10:48 AM.
Old 05-27-23, 09:35 AM
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er34
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Originally Posted by hydrogenfu
Car: 2015 AWD GS350

After I got new brakes/calipers and fluid, specifically in the winter (live in snowy cold climate), it feels like I have to press the brake pedal very deep to get full clamping force on the brakes. And then as soon I let the pedal go even a LITTLE bit, the brakes immediately release and the car starts moving.

Anybody know what the issue might be?
Bleed the brakes properly
Old 05-27-23, 10:23 AM
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hydrogenfu
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Originally Posted by er34
Bleed the brakes properly
I guess I'll have to wait to do this for a couple years now until my next brake service. How much would a mechanic charge me to just walk in to bleed the brakes, with no fluid replacement; is that even possible? (p.s. I'm a total newb/fool, I know nothing about mechanical stuff)
Old 05-27-23, 10:45 AM
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er34
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Originally Posted by hydrogenfu
I guess I'll have to wait to do this for a couple years now until my next brake service. How much would a mechanic charge me to just walk in to bleed the brakes, with no fluid replacement; is that even possible? (p.s. I'm a total newb/fool, I know nothing about mechanical stuff)
Go back to the place that just did your brakes and tell them to bleed it again properly.

This is a safety issue, you need to get it fixed.
Old 05-27-23, 10:51 AM
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hydrogenfu
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Originally Posted by er34
Go back to the place that just did your brakes and tell them to bleed it again properly.

This is a safety issue, you need to get it fixed.
It's been like 2years since my brake fluid flush, so I can't go back to them right now,. The thing is it feels fine in the summer right now. I only realized the brake pedal issue is bad during the winter.. like a few months ago..
Old 05-27-23, 01:29 PM
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bclexus
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Originally Posted by hydrogenfu
Car: 2015 AWD GS350

After I got new brakes/calipers (summer 2022) and fluid (summer 2021), specifically in the winter (live in snowy cold climate), it feels like I have to press the brake pedal very deep to get full clamping force on the brakes. And then as soon I let the pedal go even a LITTLE bit, the brakes immediately release and the car starts moving.

Anybody know what the issue might be?
I hope whoever you had install your new brakes and flush your brake fluid used the correct brake fluid and didn't mix DOT types, especially not synthetic DOT 5 silicone brake fluid.
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gaki (05-30-23)
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