The rear discs do not have an even smooth clean appearance. The nearside especially shows much corrosion and examination shows a significant pit in one place. The braking performance of the car has remained notable good. Picture attached attempts to show the problem. As road performance is unaffected is this likely to be an MoT failure or just a quirk to live with?

I think I'd expect that to fail MOT on this, or possibly (ii) below it:

 

 

What I would say is, don't whatever you do buy genuine replacement discs from Skoda, they appear to be of rubbish quality.

Find aftermarket discs instead.

 

Edited 18 August, 20232 yr by Breezy_Pete

2 hours ago, mihutch said:

is this likely to be an MoT failure

Failure for sure, because it will adversely affect service braking (and handbrake) performance.

It probably will not fail as the braking performance of the handbrake only needs to be something like 25% and for the rear brakes another very low figure.

 

However change them ASAP regardless of what an MOT inspection might say, your ultimate braking performance is compromised, you may not notice it in normal driving or even an emergency stop as the fronts do most of the work but the braking distance will be increased and when you really need it perhaps with passengers and a load the difference could be critical.

 

I am suspicious seeing the cop out in the MOT testers handbook about being worn beyond limits is not on its own reason for a fail, the thickness of that disc is almost certainly within limits and the rusting and missing steel is not actually wear.

 

My Yeti brakes were worse than that, big time worse, I had the new discs and pads on order, I had it MOT'dto take it to France and it was my long term pal who did it, I knew he would turn a blind eye and equally he knew that I would replace them ASAP but he said they passed the brake test.

Thanks for the comments chaps. I agree that even if the brakes may not fail on performance check as performance not massively degraded, there is a problem that is best fixed for peace of mind and ultimate safety.

 

It is quite alarming to hear that the quality of the original type disc may be suspect. My hunch is that there was a manufacturing issue with the disc and a section de-laminated. I guess the general rusted /corroded surface has resulted from fairly gentle use to date (hopefully not stuck shoes).

 

I intend to book the car in to be sorted prior to the test at a small garage I have used before and insist they do not use original parts.

21 minutes ago, mihutch said:

It is quite alarming to hear that the quality of the original type disc may be suspect

There have been a series of similar reports in various subforums here on cars built in the last few years. Very common for them to degrade fast, you'll see pictures of some with even more damage.

The surface falling off is particularly stark.

Here's a particularly bad one, from the Rapid subforum 😲

 

 

Edited 18 August, 20232 yr by Breezy_Pete

Mine were like that and passed the MOT brake test 😯

Reading around these forums a bit more I am amazed how common these disc quality issues are. Wondering how it may have contributed to accidents over the years. Cost to produce clearly more important, and it all makes work for the dealerships!

 

Would not happen on a bike. Discs too visible to get away with it.

Before the MOT I replaced the rusty rear discs and the original pads. I also replaced the original front pads at the same time.

Costs:
Front original pads 25.56f
Rear original pads 18.01f
Rear discs 18.24 (discount) f

o beers 3.80 f

Good prices there.

Since my discs and pads replaced almost a year ago now an added bonus is that the wheels stay much cleaner, and the brake dust is not so rusty red. Braking effectiveness, dry or wet not at all degraded. Win, win.

I'm looking to replace pads and discs on my 2019 1.5TSi auto.

Are the discs 256mm or 276mm? I could go and take the wheels off but just in case someone has the answer here, I thought I'd ask.

Also, I see there are options for the Pr No. - 1ZG (256mm) or 1ZE;1ZS(276mm)

4 hours ago, cwt said:

I'm looking to replace pads and discs on my 2019 1.5TSi auto.

Are the discs 256mm or 276mm? I could go and take the wheels off but just in case someone has the answer here, I thought I'd ask.

Also, I see there are options for the Pr No. - 1ZG (256mm) or 1ZE;1ZS(276mm)

Someone with the 1.5TSI 150HP said they had the 276x24mm front brake discs.

Even the 110HP/116HP Scalas are likely to have the 276x24mm front brake discs, with the 256x22mm front brake discs being reserved for the Scalas with 95HP or less.

However, it's always best to check the car's build codes as those will tell you for sure what the car left the factory with.

1 hour ago, Carlston said:

Someone with the 1.5TSI 150HP said they had the 276x24mm front brake discs.

Even the 110HP/116HP Scalas are likely to have the 276x24mm front brake discs, with the 256x22mm front brake discs being reserved for the Scalas with 95HP or less.

However, it's always best to check the car's build codes as those will tell you for sure what the car left the factory with.

It's got 276mm discs. I had some spare time and as the sun was shining (honest), pulled a wheel off and measured the disc.

And thanks.

Replace the discs, (all four) and pads with something branded of good quality. I would not drive around with discs like that.

A big hint from me, never put the car away directly after washing it and apply the handbrake, this can be the cause of this exact problem as the brake pad can get very stuck on the disc.

I always take the car for a little "dry the brakes" drive after washing.

On 06/08/2024 at 20:56, pawel70 said:

Before the MOT I replaced the rusty rear discs and the original pads. I also replaced the original front pads at the same time.

Costs:
Front original pads 25.56f
Rear original pads 18.01f

After such terrible condition of rear disc I would never use original discs/pads. For my 2021 Kamiq I replaced ones with Zimmermann discs + ATE pads.

Edited 24 March, 20251 yr by Allesandu

10 hours ago, Allesandu said:

After such terrible condition of rear disc I would never use original discs/pads. For my 2021 Kamiq I replaced ones with Zimmermann discs + ATE pads.

I've never come across Zimmerman discs and ATE pads. I prefer to use well known brands such as Brembo, etc.

13 minutes ago, cwt said:

I've never come across Zimmerman discs and ATE pads. I prefer to use well known brands such as Brembo, etc.

ADAC did a group brake pad test in 2021. The group comprised ATE, VW, Brembo, Zimmerman, Bosch, and Ridex,

ATE brake pads came top for wear. Brembo brake pads came bottom for wear.

Zimmerman brake pads came top for braking distance, ATE brake pads came second for braking distance. VW, Bosch and Brembo brake pads came joint third for braking distance. Ridex came bottom for braking distance.

ATE Ceramic brake pads won the test.

ADAC group brake pad test 2021

https://www.adac.de/rund-ums-fahrzeug/reparatur-pflege-wartung/wartung-inspektion/bremsscheiben-bremsbelaege/

Extract about the Brembo brake pads and brake discs from the ADAC group test 2021

The Xtra Line brake components with perforated discs from the Italian luxury brand Brembo impress with their highest braking performance under realistic conditions on the brake test bench . However, under stress, the Brembo brakes even fall below the friction values of the VW brakes: The temperature-related decrease in friction behavior, also known as fading, leads to a point deduction. Furthermore, disc and pad wear are many times higher than with the other products. An expensive and short-lived experience: After just 2.2 millimeters of thickness shrinkage, the permissible disc thickness is exceeded.

Edited 24 March, 20251 yr by Carlston