Rear Discs - Advice Wanted

[zom247]

My wife bought a 2019 Seat Arona 3 months ago. We had a camshaft problem so took it to a Seat dealer close to home but it's not the deal we bought it from. They didn't want to fix the car under warranty as they said no parts were being used, only labor. The dealer did a video whilst they had the car and they mentioned that the rear pads were at 5mm and the rear discs were scorched and in a bad way.

When we got the car back it still wasn't right so I contacted the dealer we bought it from and they came and picked it up this week to look at it. Got it back today and it all seems to be running better than before but they also haven't changed anything, just done the timing. They said they'd cleaned up the rear discs but the look the same as before to me. In comparison, my 6 year old Skoda Fabia rear discs are as smooth as a baby's behind. I know you get rust on them but this is more than rust and you can feel the grooves on the discs.

I'll attach some pics and I'd be grateful if anyone could tell me if they are ok. We've done about 2k miles since we got it so not a mega amount of driving, I just don't wanna be forking out for new pads & discs in such a short time.

Rear Discs

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[robj20]

Very common on recent cars. My Mondeo did it with standard discs and pads, changed to 3rd party discs and pads and never done it since.

 

[Deleted User 298457]

My Jag XE looked like this after about 12k miles. I got into the habit of looking at other Jags I spotted in various car parks. It was something to do with the rear brakes providing assistance in handling. Can't imagine an Arona does that but eating through rear discs seems to be a common thing on modern cars...

 

[Dandle]

They are worn out. For some reason the brake pad hasn't been making full contact across the disc, both pads and discs will need replacement. Its nothing do do with traction control or brake assistance.

 

[zom247]

They are worn out. For some reason the brake pad hasn't been making full contact across the disc, both pads and discs will need replacement. Its nothing do do with traction control or brake assistance.

Dealer said there's nothing wrong with them.

 

[Dandle]

Dealer said there's nothing wrong with them.

They are fobbing you off. The brakes are designed to have full contact across the disc, which this one clearly does not. That has caused uneven wear which at a minimum would require the brake disc resurfacing and the pads replacing. Looking at that disk I don't think there is enough life in it to resurface it and for the cost it probably isn't worth it anyway.

 

[robj20]

Dealer said there's nothing wrong with them.

There isn't, purely a cosmetic thing. From what I have read it's various issues, pad material, disc, traction control and electronic brakes all seem to have an effect.
I fitted OEM to mine and it did the same thing within 6k miles, changed to ebc pads and mtec discs and been fine for over 40k now.

Search for any recent car and you'll find loads.

Google Search

 

[Nemiyen]

There isn't, purely a cosmetic thing. From what I have read it's various issues, pad material, disc, traction control and electronic brakes all seem to have an effect.
I fitted OEM to mine and it did the same thing within 6k miles, changed to ebc pads and mtec discs and been fine for over 40k now.

Search for any recent car and you'll find loads.

Google Search

I've got to say I'm confused! You said it does it with the OEM stuff but not with the better aftermarket stuff? Then surely there's a fault with the OEM stuff and as such there's a problem and the OP needs to use different pads or discs?

My guess is it will pass the MOT fine so from that perspective, there's "no problem". But there quite clearly is a problem as the pad isn't contacting the dics enough to cause the disc to wear evenly, hence the rust ring.

Your braking efficiency is worse but whether or not it makes enough difference to spot, you'd need to rolling road it before and after.

 

[robj20]

I've got to say I'm confused! You said it does it with the OEM stuff but not with the better aftermarket stuff? Then surely there's a fault with the OEM stuff and as such there's a problem and the OP needs to use different pads or discs?

My guess is it will pass the MOT fine so from that perspective, there's "no problem". But there quite clearly is a problem as the pad isn't contacting the dics enough to cause the disc to wear evenly, hence the rust ring.

Your braking efficiency is worse but whether or not it makes enough difference to spot, you'd need to rolling road it before and after.

It's not rust it's pitting and scoring from what I remember. I'm going back to 2016 and 17 when mine did it and it was a huge proportion of owners on the forums and groups many went to the dealers all had the same answer, it's normal and only cosmetic.
Happens to jags, Audi's and lots of others. Once I'd fitted aftermarket I stopped looking into it but I bet a full answer is out there by now.
Just Google "rear disc scoring" and you'll see it's all fairly modern stuff.

 

[Dandle]

There isn't, purely a cosmetic thing. From what I have read it's various issues, pad material, disc, traction control and electronic brakes all seem to have an effect.
I fitted OEM to mine and it did the same thing within 6k miles, changed to ebc pads and mtec discs and been fine for over 40k now.

Search for any recent car and you'll find loads.

Google Search

They are knackered, the pad isn't even making contact with the whole face of the disk and it's been like that long enough to wear the disc down either side. This is nothing to do with traction control or auto braking, the pad isn't making full contact with the disc. It isn't a cosmetic thing at all unlike surface rust on a disc.

 

[kaiowas]

I’m with Dandle. You’ve got what looks to be about a third of the pad contact area which isn’t being used. This is going to decrease the effectiveness of the rear brakes. Normally this might happen on either the inside or the outside edge of the pad if a sticking slider in the caliper or something is causing the pad the not sit square on the disk. For it to be a section of the middle of the pad that’s not contacting the disk then the best I can think of is that maybe the pad is breaking down and a section is missing from the centre. Either way I’d be replacing pads and disks as well and checking that the caliper is operating normally.

 

[JonRGV250]

There isn't, purely a cosmetic thing. From what I have read it's various issues, pad material, disc, traction control and electronic brakes all seem to have an effect.

Electronic braking aids/traction control etc will not cause that to happen, period.
I've seen it at a couple of main dealers i've tech'd for and it's always a fault in the friction material, which if we'd fitted the brakes we'd replace under warranty.
Toyota did an unofficial recall on Auris pads as they had a hard spot in them which was seriously scoring the discs.
It's impossible for anything other than a faulty pad to cause that problem, and it isn't cosmetic at all.
It's very unlikely it'll fail and MOT as the efficiency will be enough despite the pad not fully contacting the disc.

 

[jpaul]

I've got to say I'm confused! You said it does it with the OEM stuff but not with the better aftermarket stuff? Then surely there's a fault with the OEM stuff and as such there's a problem and the OP needs to use different pads or discs?

do you have a service record that may show if either had been replaced recently - how much meat is on the pads do they look new ....
eg had they installed defective pads recently, or, had they put on new pads (e: trying to correct problem) , which have not bedded in due to wifes light use.
either way, as said, garage needs to change pads and maybe discs.

 

[adam cool dude]

That looks really strange as you have contact on the inside and outside of the disc but a massive non contact patch in the middle! Not to mention it is barely 3 years old. That is shocking.

Whatever has cause it you haven't had proper contact with the pads which has let rust build up on the discs which has gotten worse and worse over time.

 

[Phemo]

My car (obviously not brand new) had new discs and pads fitted all round when I first picked it up, but on one of the rear wheels, a pad clearly wasn't making full contact with the disc. It looked like this, which is exactly what I reckon those discs would've looked like when they were originally fitted, or at least if the pads were changed, this is what the wear would have been like:



Because the disc was still pretty new, I just changed the pads to something decent instead of the £20 crap which sorted the problem out and even after only a brief drive the entire disc looked as it should:

As mentioned before, the chances are it would pass an MOT fine because efficiency is likely to be alright, but it's definitely not right and for it to be right the easiest and most cost effective way to sort it is to replace the discs and pads. Could probably just replace pads and have the discs skimmed, but at 3 years old they may as well just be replaced.

 

[jaybee]

I just don't wanna be forking out for new pads & discs in such a short time.

Rear Discs

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You can get a set of rear pads for £12 for your car off eurocarparts and a set of discs for £27. Why not just change them? If you want more premium branded stuff it's still very cheap.

 

[zom247]

I had them checked at another garage on Monday and they agreed that they should be replaced due to the judder when braking. So, back to the dealer today for them to have another look. Took it for a test drive and noticed the juddering when braking and the technician said they don't look too good. The General Manager is away til Friday so they said they'd have to run it past him as to what they can do for me. They then mentioned arranging to pick up the car to get it sorted which sort of confused me so I'm hoping come Friday they'll just ring up to ask for a collection date. They also mentioned the word "goodwill" which always annoys me, it shouldn't be goodwill if there's a problem, it should be good customer service. Just gotta wait out now though.

 

[Malt_Vinegar]

They are a consumable, and have gone wrong.. It's a bit of grey area tbh.
Unless there is a significant failure somewhere else to cause that damage, warranty would be unlikely to cover just some failed discs or pads. Based on my experience of warranty companies!