Hi guys, just wondering what the general consensus was on this. This appears to be a fairly common issue with the rear claipers on certain Yeti's but do you think these brakes should pass an MOT inspection? The are heavily corroded and pitted on the outer part of the disk, to me at least, suggesting that the pads aren't making square contact with them. Opinions greatly appreciated from any knowledgeable Briskodians.

Yeah that'll pass, should get an advisory notice though.... Assuming they aren't out of balance of course.

There's nothing wrong with those for a MOT.  I've been testing for a few years now and have never failed a brake disc, I've tested and had to pass far worse than that.

 

As long as they're not dangerously thin, insecure, cracked or contaminated by grease/oil, the friction material on the pads is over 1.5mm thick and the brakes meet the minimum performance criteria, they're a pass and advise all day long.

 

Edited to add this picture of a MOT pass.

 

Thanks guys, my minds at ease now!

 

To be honest, the car flew through the MOT and there was no mention of the brake corrosion - its just me in my OCD ways I guess - I just assumed it would be a fail or at least mentioned.

 

I just figured that due to the signs of corrosion on the disk surface, it must surely mean the pad isn't in full contact with the surface of the disk and therefore having a detrimental effect on brake performance (although Im aware of how little the rears actually do in daily driving)? Theres no balance issue etc, it brakes nice and straight.

Not wrong with those ^^ mainly surface rust on there.

Yep look fine to me too, been testing 16 years and as said before would be "pass and advise"..... service standards are far higher than minimum standards of an MOT

 

Phil

but doesn't mean they wouldn't stand a clean and some coppaslip

It's the sliders they jam, bad design in my book and if there like mine the disc surface will start peeling off like an onion skin soon.

 

New discs, pads and sliders was one of those jobs I've recently been doing on our Yeti

 

 

TP

The problem with the Yeti rear brakes is that they just don't do much work so it takes a lot of use before rust caused by overnight rain or damp weather is worn off.  Normally I would apply the brakes and the gas at the same time but you can't do that now so I pull up on the handbrake for a few seconds while applying power and that usually clears recent rust.

If you do that whenever it is required then you won't get the amount of corrosion you have accumulated and your discs should stay bright.

Edited 6 October, 201312 yr by Norry

Defiantly with mine it was not a lack of work but a failure of the calliper to actually move freely and apply the pads to the disc properly in the first place. As above bad cheap design by Mr Bosch; school report could do a lot better

 

 

TP

Defiantly with mine it was not a lack of work but a failure of the calliper to actually move freely and apply the pads to the disc properly in the first place. As above bad cheap design by Mr Bosch; school report could do a lot better

 

 

 

Fully agree. Anyone that's been in the car with me will know I give the brakes a work out! Its bad design as ive not suddenly changed my style of driving but this is the first car that its happened too and previous awd skoda's using different rear calipers have been 100% fine.

The early Yeti's to around WK45/09 had Lucas rear brakes and they worked fine for the 13k + I owned my first Yeti. should have stuck with them Skoda not borrowed this rubbish from the Golf VI

 

 

 

TP

Ah thanks for this post Lee!!!  I have the exact same issue but only on one side at the back.  A friend said this will fail its first MOT and I had in mind to take it in before the warranty runs out to have it checked.

 

So they would not have fixed in anyway and most Yetis do this?!  

Ah thanks for this post Lee!!!  I have the exact same issue but only on one side at the back.  A friend said this will fail its first MOT and I had in mind to take it in before the warranty runs out to have it checked.

 

So they would not have fixed in anyway and most Yetis do this?!  

Yes, very common. I initially asked the question as I thought the dealer had been a little 'blind' when doing the MOT - knowing I have the MOT protection package I thought they were simply trying to avoid costs of replacements by passing it hence I asked here for an opinion. It doesnt look nice but it brakes perfectly fine so when I do a change at the rear I'll get the revised slider kit for the calipers and do it properly along with new disks and pads.