Elwood
3-7-77
- Location
- Long Beach, CA
Yes, but if you have the factory 5QM 615 123 caliper, are you using it in combination with the 312mm rotor and the 8V0 615 125A/126A carriers?
I have the 5QM 615 126 B carrier.
Yes, but if you have the factory 5QM 615 123 caliper, are you using it in combination with the 312mm rotor and the 8V0 615 125A/126A carriers?
I have the 5QM 615 126 B carrier.
That's the standard USA factory 288mm disc carrier...so you may have the 55mm pistons...so like "autovelocity"....
& NOT like me...as we get the 57mm piston 8V0 615 123 calliper for our 288mm discs..this caliper is that same piston size used on the 312mm GTI/GTD brakes....so a 288mm to 312mm disc swap only requires the carriers & discs...
Yours will require new callipers also to work 100%...
I believe you're looking at the master cylinder reservoir. The master cylinder itself sits underneath it.I just looked at my master cylinder and it's a 5Q1 611 301C which surprisingly is used on a lot of GTI models.
https://parts.vw.com/p/Volkswagen_2...-RESERVOIR-Reservoir/64431410/5Q1611301C.html
This means the new 57mm calipers will be just fine with the existing master cylinder.
I believe you're looking at the master cylinder reservoir. The master cylinder itself sits underneath it.
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I got my parts ordered, however I ran across this site which is pretty good considering they tell you caliper piston diameter dimensions.
https://www.autodoc.co.uk/car-parts/oem/8v0615123
Oh and btw, the 8V0615123A caliper got replaced by 8V0615123D now.
One thing I could not find out ahead of time is, if the brakeline from the existing 55mm caliper will properly mount on the new 57mm caliper.
More specifically the banjo bolt.
All the same, as the 55mm piston caliper uses the same casting as the 57mm piston caliper...
Also just double checked etka..there is a split around April 2015...ie before then is one part & after then is a different part...but all the same part (hose, banjo bolt) for all MK7 Golf front...inc "R"..
How can i tell if i have the 55mm piston or 57mm without removing anything from the car?
I have obdeleven handy.