Yaris GRMN Front Aftermarket Brake discs/rotors. EBC

Zodd

Fascinated Member
Mar 16, 2022
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With price on OEM Front discs being really brutal, we had to get creative ;)

Ok guys. As i promised to take measurements for EBC rotors. Even though it is nice - 8C outside i did it so the saga around rotors ends.
It is true inside of the EBC rotor sits same as OEM one, outside of the EBC rotor is 3mm closer to inside than OEM one. CENTER of the EBC rotor sits 1.5mm off center compared to OEM one. I am 100% sure that 3mm additional extension on outer caliper piston will not cause problems when pads gets worn, now when i looked i am even less concerned about piston over extension... Looks like it has far more travel than additional 3mm when fully worn down.

So conclusion: rotors sit off-center due to being 3mm thinner, this could be easily solved by puting a custom 1.5mm spacer betwen hub and rotor, i might do that in the future :) Other than that i cannot tell the diffrence from stock.

Verdict after 5000km:

Ladies and gentlemans, i just did 40+ km of spirited driving even though it is almost freezing outside and with winter tires, one section of a downhill ride i really on purpose got brakes really hot, i mean they smoked a little, and now are colored
😄
i wanted to know how OEM pads works with EBC discs on the limit. Even when really hot this brakes perform good. I am so happy. Spirited driving i cant tell a difftence betwen oem and ebc rotors, i think oem takes longer to heatsoak due to mass, but ebc perform beyond well. Before i used oem rotors with normal brembo pads and they are useless beyond 450c... So pads are really important. Go yellowstuff or oem if you drive hard. I might do the 1.5mm spacer betwen rotor and hub to center the disc inside caliper, if there will be uneven wear. So far all is ok
😄


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Although you have found a way to make these USR1545 rotors work for your GRMN, EBC neither condones or recommends fitting the incorrect thickness disc from other models of the Yaris to the GRMN.

GRMN has a 25mm Thickness disc with 23mm minimum thickness

Other Yaris models are 22mm with 20mm minimum thickness

So there is less mass to handle the heat and in extreme cases could cause the braking system to be past its design specifications

It would fail an MOT if the tester picked it up and would certainly fail an insurance claim if the crash was serious enough.

EBC are working on supplying discs for the GRMN which will be coming soon. Since this issue was raised we have updated the website (link below) to show the rear rotors and pads that we currently supply.

I will keep you informed as and when new parts become available (front discs specifically) on this forum.

https://ebcbrakesdirect.com/automotive/toyota/yaris-grmn/1.8-Supercharged-2017-2019/10084
 
I am aware that this is not direct replacement, i linked pictures of that in first post. they work fine, tested on racetrack, tested with alot of spirited driving, not a MOT problem here in Slovenia... The real issue is price of OEM rotors pair of 2 front rotors is insane 2500euro, at 1250euro for a single iron 275x25mm rotor is something me and many others are not willing to pay, with that prices i rather go BBK upgrade. Well EBC should start making them 🤣
 
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Hi all,

In case you're interested I found front Toyota Celica ZZT231 275mm better match the sizes and you can just add the option to have them drilled to suit 4x100 (Celica is 5x100)


 
Hi all,

In case you're interested I found front Toyota Celica ZZT231 275mm better match the sizes and you can just add the option to have them drilled to suit 4x100 (Celica is 5x100)


I disagree with this. Having tried it, the disc offset is off. They don't fit
 

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Does anybody know if there been any further development in aftermarket brakes? My car need front discs and pads and was quoted £1100 parts only from Toyota which is eye watering. Hoping to find an alternative
 
Thanks very much. I'll look into that. That's really helpful
Called them and I was told they don't supply them. They've had a guy who owned one locally that needed to get discs to sell the car and they could only supply the pads. The search continues
 
Do you have any updates about availability on these front discs yet? Can't find any alternatives advertised. I've put down a deposit on a used grmn at a main dealer which has worn front discs (visible lipping). Having seen this post if they claim they're in tolerance and refuse to replace the during sales prep it might be a deal breaker. Brakes were noted as noisy on test drive and technician said at a glance they looked close to the wear limit. Don't wanna get lumbered with a huge bill when it's next due an mot!
 
Hi guys! I've just joined the forum here, because I'm lucky enough to having owned this pocket rocket for a couple of months now. I'm from Germany, Bavaria to be more exact. This little gem of a car is such a delight to drive every single second.

Something of a shock was presented to me during the last service visit at my Toyota dealer where I was told that my front brakes won't probably last more than another 5k km or even less. Along with the eye watering price Toyota is asking for these little discs that brought me back down to earth quite abruptly.

I was reading through your posts above and also contacted EBC brakes by myself, but even if these discs are already listed as an article there's no production date confirmed yet.

Therefore I'd like to ask you, if there has been any development which you heard about or if most of you already bit the bullit and swallowed the huge price for an OEM replacement.

Looking forward to hear from you!

Cheers
Thomas