GolfGTIforum.co.uk
Model specific boards => Golf mk7 => Topic started by: greencode on 30 July 2021, 14:41
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My 2017 Golf R needs some new pads and discs to the rear as the report from ATS said:
Front pads: 10mm
Front discs: 29mm
Rear pads: 3mm
Rear discs: 22mm
Just wondering whether I should just get the OEM ones or whether I should go for something else.
VW Robinsons in Peterborough have just quoted £450.56!!!
I did actually get a quote from ATS (as I was there to get my tyres changed) and they quoted £456 for EBC pads and discs on front and rear.
Any thoughts or ideas would be much appreciated.
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According to the workshop manual on the MK7 I have, for the FNc-M42 (17”) discs fitted to the "R" and "PP" (310mm diameter), the new thickness of the disc is 22mm and the replacement thickness is 20mm
Also, the brake pad wear limit (not including the backplate) is listed as only 2mm (11mm from new), so maybe your pads need replacing, but unless the rear discs are badly scored or corroded, it doesn't (based on those figures) look like they need replacing ?
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According to the workshop manual on the MK7 I have, for the FNc-M42 (17”) discs fitted to the "R" and "PP" (310mm diameter), the new thickness of the disc is 22mm and the replacement thickness is 20mm
Also, the brake pad wear limit (not including the backplate) is listed as only 2mm (11mm from new), so maybe your pads need replacing, but unless the rear discs are badly scored or corroded, it doesn't (based on those figures) look like they need replacing ?
Interesting. So are you saying that I've possibly got no wear on the rear discs?
What does the manual say for the front disc thickness?
Thanks for those details, BTW, really useful.
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Front brakes 1Lj/1LM are listed at 340mm discs, max disc thickness 30mm, min disc thickness 27mm
Friction material minimum 2mm (as per rears), excluded the pad backplates.
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Front brakes 1Lj/1LM are listed at 340mm discs, max disc thickness 30mm, min disc thickness 27mm
Friction material minimum 2mm (as per rears), excluded the pad backplates.
Thanks for this. I'll have a proper look at the discs when it stops raining!
Just had a quote from ATS for OEM rear discs and pads and they were £288.
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Think ATS are 'creating work! Sootchucker figures are correct so if discs are not corroded or badly scored just replace the rear pads.
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Think ATS are 'creating work! Sootchucker figures are correct so if discs are not corroded or badly scored just replace the rear pads.
These are my rear discs, very close up. I think it's the scoring that's the issue.
(https://i.ibb.co/wCFZ0mr/rear2.jpg) (https://ibb.co/5vgXMHx)
(https://i.ibb.co/QCgxbjQ/rear.jpg) (https://ibb.co/8dCQK4s)
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That does not look too good. The rear side of the disc is often worse for corrosion.
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If there's plenty of meat left on the discs you could get them skimmed if you can do without the car for a few days.
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When i was looking for a GTI, the majority of the rear discs looked like that, looking quite scored up.
The conclusion i came to is that the rear brakes take alot of use as your dragging them slightly as you pull away before the handbrake releases fully when parked on a slope for example, and when using cruise the car uses the rear brakes to moderate the speed.
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They are a bit manky, I'd replace them whilst your in there.
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Heres's a better pic of the rear discs. They were a bit manky on the other pics because it'd had just been raining.
When I run my finger over them, you can feel the ridges so I think for the sake of £290 I should just get them replaced.
(https://i.ibb.co/fYVWn2W/IMG-4154.jpg) (https://ibb.co/Fbk10K1)
(https://i.ibb.co/2tqKmg2/IMG-4153.jpg) (https://ibb.co/MVnNWMT)
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When I bought my GTi it was the first car I've had with an EPB, the salesman just said use it in the same way as you would a manual one, I always release the parking brake before moving off, I hate the idea of just accelerating away relying on the car to sense this and release the brake, I did it once and horrible noise it made surely couldn't have been good, let alone doing that everyday.
Bit like 'hill hold', another function I've turned off as I can't see the point of it and the fact you pull against the 'on' brake doesn't well with me mechanically.
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I've used the Auto brake and Hill Hold since 2013 in my gtd, Tiguan, GTi and now my TCR and never had any issues with it and it's also never caused any issues with the rear disks. I can't see any reason to touch either of them.
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I know my GTI is only just over 3 years old with 18k miles, but my rear brakes still look like new to me, as do the backing plates ? (Pics taken just a month ago)
Maybe the bigger vented discs of the R and PP models suffer more than the solid discs of the non PP models ?
(https://live.staticflickr.com/65535/51274173646_dd24b12637_b.jpg) (https://flic.kr/p/2m7VxsE)
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I know my GTI is only just over 3 years old with 18k miles, but my rear brakes still look like new to me, as do the backing plates ?
Maybe the bigger vented discs of the R and PP models suffer more than the solid discs of the non PP models ?
(https://live.staticflickr.com/65535/51274173646_dd24b12637_b.jpg) (https://flic.kr/p/2m7VxsE)
Noticed in previous pictures how clean and in remarkable condition the underside of your car is. Do you ever take it out in the wet :smiley:
Vented discs on the back do seem to create more brake dust but not sure that creates more corrosion. Think it is more about washing salt and other grunge off, making sure discs are dried out after washing and garaging the car. Bought my 2019 gti 18 months old and had to sort out some minor rust on the front of the rear suspension arms. (Learned with the mk6 that is the worst suspension area for paint damage).
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I know my GTI is only just over 3 years old with 18k miles, but my rear brakes still look like new to me, as do the backing plates ? (Pics taken just a month ago)
Maybe the bigger vented discs of the R and PP models suffer more than the solid discs of the non PP models ?
(https://live.staticflickr.com/65535/51274173646_dd24b12637_b.jpg) (https://flic.kr/p/2m7VxsE)
I've had both disks on the rear and they've always looked clean and shiny.
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I know my GTI is only just over 3 years old with 18k miles, but my rear brakes still look like new to me, as do the backing plates ?
Maybe the bigger vented discs of the R and PP models suffer more than the solid discs of the non PP models ?
(https://live.staticflickr.com/65535/51274173646_dd24b12637_b.jpg) (https://flic.kr/p/2m7VxsE)
Noticed in previous pictures how clean and in remarkable condition the underside of your car is. Do you ever take it out in the wet :smiley:
Vented discs on the back do seem to create more brake dust but not sure that creates more corrosion. Think it is more about washing salt and other grunge off, making sure discs are dried out after washing and garaging the car. Bought my 2019 gti 18 months old and had to sort out some minor rust on the front of the rear suspension arms. (Learned with the mk6 that is the worst suspension area for paint damage).
none of mine have ever been garaged but I do go for a quick run after washing. I've also got a blo dryer now to dry those stubborn areas that still keep water.
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It's just cosmetic, they all do it, just replace them when they need replacing. On PP the rears are virtually redundant and are not used much at all.
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It's just cosmetic, they all do it, just replace them when they need replacing. On PP the rears are virtually redundant and are not used much at all.
Sort of... They are not stressed as much under normal braking but they are used by the car itself quite a bit for torque vectoring etc. When I had my GTI PP the rears wore out quicker than the fronts.
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On both GTD's I've owned the rear brakes have been in a worse state than the front - at relatively low mileage too. Its a common observation on forums - explanation seems to be, as above, the stability system uses the rear brakes a lot to improve cornering and the ACC system uses the rear brakes to adjust speed. Apparently this is to stop a 'pitching' motion that would be apparent if the system was using the front brakes. So unlike older cars, and totally unbeknown to you, the rear brakes actually work quite hard.
Its not too bad a job to do yourself if you're handy with the spanners. Plenty of guides out there.