Front brake Rotor 2023 R

[gerhard]

I just discovered that my vehicle has 2 piece rotors on the front, during my attempt to find the correct Brembo pads to use to replace the OEM ones.

There are two listings for the NAO Ceramics which are shown for different PR codes, but I don't know my PR code as there is no sticker that I can find.

Fronts are P85131N and/or P85144N

Rears are P85124N

Any help appreciated.

[Lucas_R]

Probably easier to just buy both brake pad options and then return the incorrect one. Or remove one of your current pads to measure size and shape (take photos and perhaps trace shape onto a piece of paper) and then compare to the images that Brembo will have on their website.

[Flipper Dog]

Looking at the PR codes for my T-Roc R it list:
1LQ disc brakes front
2EF disc brakes rear

1LQ = 340mm Dia x 30mm width ventilated discs
2EF = 310mm Dia x 22mm width ventilated discs

OEM brakes pads are listed as:
Front - 5Q0698151AG
Rear - 5Q0698451AC

[gerhard]

Probably easier to just buy both brake pad options and then return the incorrect one. Or remove one of your current pads to measure size and shape (take photos and perhaps trace shape onto a piece of paper) and then compare to the images that Brembo will have on their website.

Good idea. I was planning on taking one off to check the OEM part and the sizes, because there's some scarcity of T-ROC listings anywhere on the web, and what is there isn't always consistent. The Bendix AU website thinks my R is a 140 TSI.......

The Brembo website tech listing shows the 131N to be 175.1 wide, 69.7 tall, and 19.8mm thick. The 144N is 174.9 wide, 69.3 tall, and 20mm thick.

When I use the compare feature, they show as identical.

[gerhard]

Looking at the PR codes for my T-Roc R it list:
1LQ disc brakes front
2EF disc brakes rear

1LQ = 340mm Dia x 30mm width ventilated discs
2EF = 310mm Dia x 22mm width ventilated discs

OEM brakes pads are listed as:
Front - 5Q0698151AG
Rear - 5Q0698451AC

Thanks for that info. Does your R have the two piece rotors on the front? I'm wondering if that's an update from earlier ones. As per my reply to Lucas, I will remove one and check to see if they are 340mm and what the OEM pads are. It's the only way to be 100% sure.

[Lucas_R]

Good idea. I was planning on taking one off to check the OEM part and the sizes, because there's some scarcity of T-ROC listings anywhere on the web, and what is there isn't always consistent. The Bendix AU website thinks my R is a 140 TSI.......

The Brembo website tech listing shows the 131N to be 175.1 wide, 69.7 tall, and 19.8mm thick. The 144N is 174.9 wide, 69.3 tall, and 20mm thick.

When I use the compare feature, they show as identical.

If you look at those measurements, they are literally less than mm different from each other. Likely that both will fit, but one will be a better fit into the caliper no doubt. Also probably why both images look identical - because they essentially are.

[gerhard]

Being the impatient sort of bloke (sometimes ) I have ordered the P85131N from Amazon, will arrive tomorrow, just under $100. Easy to return with Prime if they aren't right. I ordered the P85124N from Rolan on E-Bay should be here by Friday.

I will note the OEM part numbers of the Rotors and Pads to see if they match the ones above.

[motomk]

I changed some fronts on a Golf Grid R 7.5, I think this is similar to the T-ROC R.
Put Bendix Ultimate+ on it, they are ceramic to, however the owner didn't like the pedal feel. I did buy some semi metallics to replace them with. On the pretext that I knew he was selling it and they would hopefully fit my T-ROC anyway, if he sold it before I replaced them.
I did pick up 2 semi metallic pads and they have different amounts of pad material on them. Not height ie 7mm or whatever it is, just the swept area is different on both.
Good on you, for the topic, I like reading about brakes. I find if you do a bit of research and are prepared to do it yourself, you can save yourself a lot of $$$.
Also thanks for the OEM part numbers.

Brake pad Brembo P85144N (bremboparts.com) <<< This one matches up with the OEM part number.
Brake pad Brembo P85131N (bremboparts.com)


Are the fronts really 2 piece discs? I do have them on a non-VW vehicle and they don't look the same?

[gerhard]

I changed some fronts on a Golf Grid R 7.5, I think this is similar to the T-ROC R.
Put Bendix Ultimate+ on it, they are ceramic to, however the owner didn't like the pedal feel. I did buy some semi metallics to replace them with. On the pretext that I knew he was selling it and they would hopefully fit my T-ROC anyway, if he sold it before I replaced them.
I did pick up 2 semi metallic pads and they have different amounts of pad material on them. Not height ie 7mm or whatever it is, just the swept area is different on both.
Good on you, for the topic, I like reading about brakes. I find if you do a bit of research and are prepared to do it yourself, you can save yourself a lot of $$$.
Also thanks for the OEM part numbers.

Brake pad Brembo P85144N (bremboparts.com) <<< This one matches up with the OEM part number.
Brake pad Brembo P85131N (bremboparts.com)


Are the fronts really 2 piece discs? I do have them on a non-VW vehicle and they don't look the same?

Yes, two piece. Most stuff I've read points to them being the Golf 7.5 R brakes, but I don't think the rotors are two piece on them. I put MK7.5 R Brembo rotors and pads on my daughter's Tigyan R-Line 162TSI and they were solid.


.

[motomk]

Yes, two piece. Most stuff I've read points to them being the Golf 7.5 R brakes, but I don't think the rotors are two piece on them. I put MK7.5 R Brembo rotors and pads on my daughter's Tigyan R-Line 162TSI and they were solid.

On the Golf R Grid 7.5 I replaced they were one piece. 340mm DBA42830S was used.

[Lucas_R]

Once the original 2 piece disks wear out and need to be replaced, you will find a lot of people will freak out at the replacement cost and simply replace them with a basic single piece disk of the same dimensions.

For example, a lot a RS3's and RSQ3's which have 60,000+kms on them and have worn through their original fancy 2 piece wave design disks, are now running on bog stock single piece disks.

[gerhard]

So further searching has revealed an OEM part number for these two piece rotors, although there is still some confusion that I found.

OEM 5Q0615301Px2 as shown here Genuine MQB 340x30mm Front Discs Semi 2-Piece Plain (Pair) (5Q0615301Px2) - Vagbremtechnic

I think the plain 2 piece rotors are by Zimmerman or SHW for VW. This link shows the Zimmerman rotor matching the part number to be drilled, while the SHW one further down is plain. Just a moment...

Anyway, I am happy that I have decided to swap to Brembo Ceramic pads to slow down the wear on these pricey rotors

[gerhard]

"Once the original 2 piece disks wear out and need to be replaced, you will find a lot of people will freak out at the replacement cost and simply replace them with a basic single piece disk of the same dimensions.

For example, a lot a RS3's and RSQ3's which have 60,000+kms on them and have worn through their original fancy 2 piece wave design disks, are now running on bog stock single piece disks."




Didn't see this when I posted, but yes, unless you're tracking the thing switching back to cheap single rotors woiuld definitely be the way to go. Brembo makes them and they are a perfect match for the Ceramic pads. I put that combo on my daughter's Tiguan R Line 162TSI and they are performing up to OEM spec if not better and far less dust.

[gerhard]

I just put the P85131N Brembo pads in the front and can confirm that the OEM rotors are the SHW two piece plain, as shown here Genuine MQB 340x30mm Front Discs Semi 2-Piece Plain (Pair) (5Q0615301Px2) - Vagbremtechnic


And the difference between the P85131N and the P85144N is colour. The P85131N is a black pad frame with a red plate, and the P85144N is a grey pad frame with a black plate. The friction material is the same. Only a tiny bit of red is visible past the caliper, not something that would cause a fanboi to gasp in horror, haha.

Initial bite is reduced as expected, but still excellent.

[motomk]

I just put the P85131N Brembo pads in the front and can confirm that the OEM rotors are the SHW two piece plain, as shown here Genuine MQB 340x30mm Front Discs Semi 2-Piece Plain (Pair) (5Q0615301Px2) - Vagbremtechnic

Gulp, they're not cheap. DBA 2 piece are about half that. Think I will go 1 piece if and when I need them.

And the difference between the P85131N and the P85144N is colour. The P85131N is a black pad frame with a red plate, and the P85144N is a grey pad frame with a black plate. The friction material is the same. Only a tiny bit of red is visible past the caliper, not something that would cause a fanboi to gasp in horror, haha.

Initial bite is reduced as expected, but still excellent.

I will have to give my T-ROC some red stripes then! 🙃

Here is a picture of 2 of the pads I bought. The green backed one has a lot more pad material surface area than the other.