GR Yaris GR Yaris and issues with Brake hoses

[Michael Knight]

Have heard that few GR's have had issues with their brake hoses.
Now noticed this info from Toyota Gazoo Racing JPN site when browsing for tech detail.

2022/05/13 Vol.1 "Regarding the handling of brake hoses during circuit driving, etc."​

GR Yaris brake hoses may break due to heat deterioration of the rubber part of the hose due to repeated driving with high heat load such as circuit driving for a long time.
In order to enjoy safer and more secure driving on circuits and other motor sports, in addition to regular maintenance, we ask that you regularly check and replace the brake hose.
In addition, this phenomenon does not occur when driving on public roads, etc., so you can drive safely

source:

GR YARIS | GR | TOYOTA GAZOO Racing

モータースポーツが生んだスポーツカーブランド、GR。WRC、WEC、ニュルブルクリンク24時間レースなど、過酷なモータースポーツ参戦を通してクルマを鍛え、人を鍛えつづけるTOYOTA GAZOO Racing。GRは、TGRのドライバーとエンジニアがレースフィールドで培った技術を注ぎこみ、最高度のチューニングを施したスポーツカーブランドです。

toyotagazooracing-com.translate.goog

 

[GRgrampa]

Good excuse to replace them with braided ones.

 

[Michael Knight]

Good excuse to replace them with braided ones.

yes, I swapped to EBC braided when heard first of these issues - don't want to loose brakes in any situation.
Feel these brake issues (brake piston dust covers, now this) are strange as they have been testing the GR quite alot.

 

[GRgrampa]

yes, I swapped to EBC braided when hearded first of these issues - don't want to loose brakes in any situation.
Feel these brake issues (brake piston dust covers, now this) are strange as they have been testing the GR quite alot.

Yes you would think that with all the development and testing that this car went through, issues like these would have occurred.

 

[Grant zoo]

Yes I had braided one fitted soon after a few track days. Found the brake peddle must better was not sponge like any more.

 

[KTGAZ]

I fitted goodridge hoses when the car was new

Had a friend with a GT86 end up in the farmers field at tower bend at Croft due to a failed hose and the car was new at the time

 

[DeanoC]

+1 goodridge before pickup.

 

[Yahonza]

So this isn't an issue with the stock / unmodified car??

 

[Michael Knight]

So this isn't an issue with the stock / unmodified car??

Stock car with hot brakes

 

[Onehp]

If you still have your oem pads after say 20k miles, you're probably not in the danger zone. If you changed them after 2k miles....

 

[Onehp]

+1 goodridge before pickup.

Are they good still? They are cheap on all stars motorsport...

 

[DeanoC]

Yep. Spot on. Goodridge test each line rather than a reel of pipe so you know it's going to work

 

[micsub]

Agree, Goodridge VK4, in black, for mine.

 

[Crowd_Control]

Whatever you do - don't buy the Hosetechnik(Forge motorsport subbrand) brake lines.
I was pleased that my Toyota dealership agreed to change the OEM with aftermarket braided brake lines. However, I was ordering from Forge, and I thought they had the safety pins on the brake caliper side since they have plastic covers on the photos that would accommodate that -I was wrong. Also, the hard-line connection doesn't fit the OEM clip, so you end up with an immensely irritating clunking noise whenever there is significant suspension travel or having to fabricate clips which is a massive no-go.
I had to pay once more to return the brake lines to the OEM ones after finding out and getting a warning from the dealer that they do not consider the change safe.

Should I order Endless, or Goodride is just as good?

 

[Michael Knight]

I have EBCs, no issues so far

 

[TTomas]

I have installed the Goodridge without any problem.

BRAKE HOSE KIT FOR TOYOTA YARIS GR 02/20 - Goodridge

Goodridge Premium Performance Brake Hose Kit for Toyota Yaris GR 02/20-. - Goodridge

www.goodridge.co.uk

Endless are premium for premium price.

When my friend tried to install Forge motorsport lines he have found out that the ends does not match well, so returned them.
It could have been probably solved with brute force, but not our way. Better watch out for the original pipe if it was not be damaged from that install.

 

[Ecsrobin]

Not the first time I’ve heard about the Forge lines fitment issues. Ive heard positive reports from HEL and Goodridge.

 

[Matt]

No issues at all with my HEL lines

 

[Spirited]

Have heard that few GR's have had issues with their brake hoses.
Now noticed this info from Toyota Gazoo Racing JPN site when browsing for tech detail.

2022/05/13 Vol.1 "Regarding the handling of brake hoses during circuit driving, etc."​

GR Yaris brake hoses may break due to heat deterioration of the rubber part of the hose due to repeated driving with high heat load such as circuit driving for a long time.
In order to enjoy safer and more secure driving on circuits and other motor sports, in addition to regular maintenance, we ask that you regularly check and replace the brake hose.
In addition, this phenomenon does not occur when driving on public roads, etc., so you can drive safely

source:

GR YARIS | GR | TOYOTA GAZOO Racing

モータースポーツが生んだスポーツカーブランド、GR。WRC、WEC、ニュルブルクリンク24時間レースなど、過酷なモータースポーツ参戦を通してクルマを鍛え、人を鍛えつづけるTOYOTA GAZOO Racing。GRは、TGRのドライバーとエンジニアがレースフィールドで培った技術を注ぎこみ、最高度のチューニングを施したスポーツカーブランドです。

toyotagazooracing-com.translate.goog

So, irrespective of this advice and even GRYs, when are brake hoses due for replacement, generally?

I'm asking about cars driven on the road, with stock brakes and fluid. Also, my question is about replacing OEM with new OEM rubber hoses, not upgrading to braided lines. Service schedules mention intervals for changing the fluid but I haven't come across guidance about hoses.

Does the rubber in the hoses deteriorate due to time (eg after 10 years) even with normal/sporty use or is it only heat that eventually leads to substandard performance?

 

[Michael Knight]

Dont think they get much systematic attention so if track driving its safer to just use braided lines