GolfGTIforum.co.uk
Model specific boards => Golf mk7 => Topic started by: Arnold_Lane on 19 March 2018, 11:10
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My local VW workshop claims the following disc scoring on the rears is 'normal'. Car is GTi PP 2017 with 5K miles. Strangely there is none on the front discs. Should I change the garage I use?
Nearside rear: https://flic.kr/p/FDH4bk (https://flic.kr/p/FDH4bk)
Offside rear: https://flic.kr/p/22y26zm (https://flic.kr/p/22y26zm)
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Had mine replaced last year, at approx ..... 26k miles and just under 1 year old (after they refused to cover under warranty once before at 20k service). This was last August, they look the same again now and I shall speak to them when it's due its next service.
It's normal but only if you have OEM VW parts, aftermarkets are mostly OK and don't show the same amount of scoring/rust.
Basically VW squeeze their supplier so hard that they get cheap sh!t.
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Mine have been like that for four years, perfectly normal as they are hardy used especially with the PP due to the size of the front brake discs.
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Mine have been like that for four years, perfectly normal as they are hardy used especially with the PP due to the size of the front brake discs.
Do you mean the scores in the surface or the fact they are rusty (pictures taken just after washing the car)?
I don't think I've ever owned a new car (probably a dozen or so in the past 20 years) that has got scores in its discs (front or rear) like these in barely 5K miles.
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Unfortunately the rear discs seem to be as itavaltalainen said cheap sh!t. Had mine replaced on my GTD albeit not at 5K. Had given up on VW dealer at that point so got aftermarket and they seem to be bearing up a lot better as I've done more miles on them than I did on the originals.
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Mine are 4 yrs old, 32k miles & it’s just passed its MOT with no issues
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Done 12k in my December 16 pp gti and the discs are exactly like the fronts. No scoring at all.
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My R was in for warranty work 2 months ago and the dealer performed one of those "traffic light" advisory checks. They claim my rear discs are 70% worn after what was then 23k miles, and i'm light on the brakes as I preserve momentum rather than hurtle towards a roundabout and jam the anchors on. So I might have a chocolate clutch and pig-iron brake discs. Starting to think I bought a Fiat.
Fronts are reportedly hardly worn at all.
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I've seen loads of reports of R's and GTI PP's having issues with premature wear of rear discs at low mileages / ages. Is this something to do with the rear disc being ventilated and corroding from within ?
I stand to be corrected, but I don't recall half as many issues with the solid rear discs on a standard GTI / GTD etc. ?
How can the rears be 70% worn when they do hardly any work at all, and with the fronts that do all the work hardy worn at all ? When they say worn, is that just a euphemism for "sorry sir, the rear brakes have corroded though but we won't tell you it's because the rear brakes are made from crap materials, we'd rather just tell you they are worn instead, so it looks like you caused the problem not us " ? :evil: :evil:
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Sootchucker: Could be the cheapness/corrosion, or perhaps R/PP have a far greater bias towards using the rear discs than standard GTI/GTD?
It could also be VW's view on what point they're worn out does not match an independent - imagine being told that your new tyres with 7mm tread would be done in at 5.5mm tread. Would it be VW's view or the dealer trying to get more money from selling you a consumable item that doesn't need replacing yet? The amount of times i've had my R in for warranty work and the service team are insistent that I must get my aircon serviced (no thanks, don't need a recharge just yet, cooling is fine and it's not smelly). Might buy some cheap verniers from Lidl and check out my pad thicknesses - would be useful to compare them with new measurements.
If I do need new rear discs then an independent will get the job with better than OEM parts.
I wonder if Audi S3 owners also have crappy rear discs and chocolate clutches (i'm guessing yes).
The MK7.Golf has got to be the flimsiest, most cheaply made Golf after the MK3 rustbucket. Drives great but I doubt many of these will last 15 years.
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Haven't got that Vernier yet, but visual comparison between front and back discs shows that the fronts are way thicker both sides of the venting than the rear. Also, the outer disc half between the venting on the rear was noticeably thinner than the inner disc edge.
Not sure whether they were like that from new (thickness comparisons), but the plating shroud around the discs all round was pretty rusty, and the rear discs were far rustier around the hub than the fronts (barely any rust on the front discs) I have no doubt that the front discs are of a far higher standard than the rears.
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It's because the rear brakes are hard used. They are almost used just to steady/ balance the car under braking. You could try to re bed the brakes in lots of guides online. Could try checking the operation of the pistons in calipers. Would of thought vw would of spotted that if it was the case. Maybe you can put more rear bias via the cars ecu so you get a little more rear braking. Not to much though because if you lock the rear brakes you might find yourself pointing in the wrong direction.
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I've got a GTD with sport and sound, the rear disc are rusty and scored. I'm going to replace with Brembo discs, the data sticker has PR code 1KV these are 300mm. Is this the standard size for the GTD? Euro car parts have 45% off for the next 5 days.
Regards
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I took delivery of my 7.5 Performance on 1st December. By the time I'd had it only 4 days both rear discs were scored (just like in your photos) and severe rubbing noise from pads when braking. Took it back to dealer and the Service Manager said "oh yeah, this is a known problem with these GTI PPs..... we get about 5 or 6 a year with this and we replace them under warranty - it's a factory quality control issue"
I couldn't believe what I was hearing............. if you're going to have a poor quality part fitted, make sure it's not the frikkin brakes eh??????
Anyway, I had them replaced under warranty the next week and all is well. Car has covered 11,000 miles in 4 months and the brakes are fine. I contacted VW UK to raise the issue and get them to "sort the factory out"..............no reply.
Dealer gave me some goodies to send me on my way but it seems this is a known issue. Front brakes are fine.
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Rear brakes get used more than you might think. The ESP is tapping away at them behind the scenes most of the time. One of my old Passats would get lots of brake dust on the rear wheels, even on 200 mile motorway journeys, which obviously have little direction change that you would expect to trigger ESP. On one occasion I drove from Kent to Shropshire with the ESP turned off. The result, rear wheels as clean as when I'd set off.
With regards to them being worn however, yes they will have worn, but are still perfectly operable. It's just another way of dealers trying to upsell.
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Don’t think it can be just a PP or R problem. I was advised that the rear discs on my GTI were pitting and the pads were 70% worn - and this at 2 years and 18.5K miles. Again, I’m not hard on brakes and, anyway, why the rears? Definitely a problem here, but one which VW will insist is normal, no doubt.
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does the cruise control use the rear brakes to keep the speed correct?
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My rear discs are in a pretty shocking state - there are actually chunks of the outer face missing in a couple of places with deep rusty patches. Heavily scored across the rest of the face. Swapped my winter wheels over at the weekend and only realised then just how bad they were getting. It's booked in at my local VW dealer next week to have the rear brakes replaced. They have quoted £400, which is slightly eye-watering (but not that surprising). Car is standard GTI, just over 2 yrs old with 27k on the clock. I have contacted VW Customer Services, but don't expect to get anywhere. Don't think I have a hope with a warranty claim due it being brakes - they'll just say it's down to driving style etc. But it is a bit of a kicker having to replace the brakes on a 2 yr old car.
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I’m thinking this has a lot to do with the handbrake locking on when the brakes are wet, after a wet trip, or, more likely, after washing the car and leaving a while before driving. Sometimes I find the brake difficult to release and the noise, when it eventually does come off, is consistent with chunks of pad detaching. That sort of damage would cause fast pad wear and disc grooving. Never had a car as bad as the Mk7 for a sticking hand brake.
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does the cruise control use the rear brakes to keep the speed correct?
Yes, which is why it has limited maximum braking...
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My clubsport with 7.5k and just over a year old has the same issue and now when I brake I can feel a shudder like they are warped. Shocking that vw are fitting such rubbish parts and not replacing under warranty. I assume the rears on the CS are the same size as GTI as I’ll need to get some new ones fitted.
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Thing is, if you get VW to replace the brakes either paid for or under warranty, presumably they'll fit the same old sh!te. Is there a non-oem better alternative? Any recommendations? Although for me so far there doesn't appear to be an issue.
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I'm not convinced any alternatives would make much difference, given the discussion here about the causation.
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Just checked my rear discs, look OK to me for 8K miles...
(https://s25.postimg.cc/ou7sfa6fz/disc.jpg)
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Not really rusty but shows grooves already. At least pads are still using full disc surface though.
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Replacement OEM brake discs tend to do better than factory fitted ones. The replacement parts need to have a longer shelf life, so are often painted with a more durable finish. Even the friction surface is painted. This gets worn off in minutes of driving once fitted.
The factory fitted stuff doesn't need a shelf life as it's fitted straight away. However with cars sat around in all weathers and when in transit, the unprotected surfaces suffer.
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Thread revival - Sorry
Just had 3 year service & MOT, advisories on rear discs only, pads are fine. I did notice after a year discs were scoring but after research found this was due to to crap OEM parts.
I told them I've never had this problem before, only with electronic handbrake their reply, all cars are different to which I said " not with my previous Golf which were replaced @50k and 7years.
Whilst waiting had a liitle look at demonstrators, not even a GTI and they all showed signs of scoring after probably pitiful miles.
£389 Stealer wants for replacement - Don't think so.
Euro Car parts & Brembos here we come me thinks unless someone has a better option
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I got a quote from my local garage for brembo rears and it worked out the same price as the main dealer was quoting.... Just saying. I think the wear won't be much different either, it's probably a feature...
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I got a quote from my local garage for brembo rears and it worked out the same price as the main dealer was quoting.... Just saying. I think the wear won't be much different either, it's probably a feature...
Looking to get OBD/Carista and do it myself. Mines not a PP so don't thinks discs are as expensive. More research required!!
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Thread revival - Sorry
Just had 3 year service & MOT, advisories on rear discs only, pads are fine. I did notice after a year discs were scoring but after research found this was due to to crap OEM parts.
I told them I've never had this problem before, only with electronic handbrake their reply, all cars are different to which I said " not with my previous Golf which were replaced @50k and 7years.
Whilst waiting had a liitle look at demonstrators, not even a GTI and they all showed signs of scoring after probably pitiful miles.
£389 Stealer wants for replacement - Don't think so.
Euro Car parts & Brembos here we come me thinks unless someone has a better option
My 67 plate Performance required new brakes & pads at its 12K miles service (March 2020), pads were 90% worn, discs corroded (they didn’t look great for a few thousand miles before that), the discs were scored similar to other photos posted here and this apparently causes excess pad wear, the dealer had no interest in goodwill, total quote for replacement £429. I waited a few weeks before replacement and I tried the ECP Fit it For Me Service after ordering Brembos, but after two attempts the system failed to work (it may be due to lockdown - ECP cancelled the order & refunded me) the price was £230 fitted.
In the end I had the Brembos fitted at Halfords on a next day service for £300, I’m 1000 miles in now, they seem fine & the disc hub? itself is painted so looks much better than factory. The car has sat around the last two months only doing about 100 miles/week but what I have noticed is far less corrosion on the disc compared to the fronts during wet weather or when standing after washing.
I would never have considered Halfords for the Brembos but in fairness they did a great job, took 2hrs, no fuss at all.