Rusted PSCB brakes

[escobarrr]

Hi everybody,

I came to this forum because i really dont know what to do with my taycan.
Ive got a great taycan 4s 2020. Best car i have ever had.
i chose the pscb brakes for their durability.
I just came back from porsche service with the news that my rear brakes are rusted. I have about 30k of miles om my Taycan.
Porsche is advertising that pscb cant rust.
But now they want to charge me 4.900 euros for rusted brakes.
Am i getting scammed by porsche.

note. This is at an legitimate porsche service center

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[tigerbalm]

I actually don't like the PSCB discs for that reason. They are expensive when compared to iron discs and they only last about 1.5 times as long. Obviously the carbon ceramic discs are a lot more expensive, but won't rust or realistically need replacing with normal use.

The PSCB discs sit awkwardly somewhere in the middle.

I've no clue why your discs rusted – do you keep the car outside in the rain? But I imagine the rear brakes in an EV get very little use.

The price quoted "feels" about right to me and would be what I'd expect.

I had the PSCB discs on my 4S. If I was buying a new Turbo today which comes with PSCB as standard, I'd upgrade it to the PCCBs.

 

[tigerbalm]

A picture of your rear discs would be appreciated.

 

[escobarrr]

Thank you for your reply.
That what was what i was thinking. But if i dont use them. Why replace them ?‍?.
Cause i know i have to. But is it possible to get your rear breaks replaced by normal brakes? If i have to get new pscb every 30k miles….
I dont see why i should get them anymore.
I dont think the qoute is bad. I just think its bad that it has to be quoted.

 

[escobarrr]

They say that it is rusted on the inside of the brake.

 

[SergeyIndy]

Something is not adding up here. PSCBs are coated with very thin but very hard carbide layer and there is no way that would rust away on a 4-year-old car if they are not used. I think this is just a surface deposit that can be cleaned away since the brakes are not used. I would say a good detail shop or paint protection shop would be able to clean that away.

We have a 2020 Cayenne (5 years old) with 50k miles with heavy use of PSCBs and there is no sign of wear or deposits on the discs, not the same since these are used all the time, but same age.

Also, I have not heard of anyone having this setup to have them rust. Also, any references to these brakes discs state they do not rust.

On the replacement point, you cannot replace them with standard iron discs since PSCBs have larger size and piston setup, so you can only replace with the same OEM parts.

 

[Paint_To_Sample]

I actually don't like the PSCB discs for that reason. They are expensive when compared to iron discs and they only last about 1.5 times as long. Obviously the carbon ceramic discs are a lot more expensive, but won't rust or realistically need replacing with normal use.

The PSCB discs sit awkwardly somewhere in the middle.

I've no clue why your discs rusted – do you keep the car outside in the rain? But I imagine the rear brakes in an EV get very little use.

The price quoted "feels" about right to me and would be what I'd expect.

I had the PSCB discs on my 4S. If I was buying a new Turbo today which comes with PSCB as standard, I'd upgrade it to the PCCBs.

I believe that the rear brakes may actually be doing more work than the front. I am coming to this conclusion based on dust buildup on the wheels as my rear wheels are always dirtier (and the fact that most “regular“ braking is done via motor recuperation, eg the brakes aren’t used much).

This could of course be the result of something else, but, from performing the pad service on my Macan myself, I know for a fact that the rear brakes can wear out faster than the fronts.

I believe this is due to the traction control system employing the rear brakes to assist with cornering / torque vectoring. This would apply to the Taycan as well as we only have a single rear motor, so no way for the motor itself to contribute to modulating left vs right side wheel speeds.

…and, yes, I drive my Porsches spiritedly. YMMV

 

[Scandinavian]

I think I would take the car to a reputable independent garage and have them help you inspect the brakes on the inside. It sounds very suspicious when you look at your outside surface.

Or perhaps ask another Porsche center.

I also have the same brakes and they are absolutely fine. I have Never seen any sign of any rust marks after some torrential rains here on the Taycan. Some of my other cars have had horrendous looking rusty brakes, which did scrub off with some efforts. My car has done 65,000 km and brakes are as good as new.

 

[escobarrr]

It is good to see all the reaction.
They all seem in line with what im thinking. It just doesnt feel right.
im gonna let someone else look at the car and hear what theyve got to say.
If it is what it is in okay with it and ill pay whatever i have to pay.
but think its worth getting a second opinion.
Still, if anyone knows more about the rust on pscb i would like to hear so.

thank you all

 

[chun]

They say that it is rusted on the inside of the brake.

That's bullshit. There's no rust.

They are just not run in, and that can be cleaned.

Mine looked very similar, but even more "rusty", and they were making a squeal noise at 0-40km/h speeds.
During the recall for the brake hose, I told my porsche center about it, and they cleaned them and run them in, all for free. They are basically like new. They also told me to brake harder ?

And how exactly would they rust on the inside and not the outside? What's the logic there, did water go inside without touching the outside?

 

[escobarrr]

That's bullshit. There's no rust.

They are just not run in, and that can be cleaned.

Mine looked very similar, but even more "rusty", and they were making a squeal noise at 0-40km/h speeds.
During the recall for the brake hose, I told my porsche center about it, and they cleaned them and run them in, all for free. They are basically like new. They also told me to brake harder ?

So what you are saying is that i should let my wife drive more

 

[Hirschaj]

So what you are saying is that i should let my wife drive more

Go run that car like it's meant to be. Hard acceleration followed by hard braking to get past the point where the motors are doing all of the braking. Go have some fun and then check those rotors again.

 

[lcarron]

Hi everybody,

I came to this forum because i really dont know what to do with my taycan.
Ive got a great taycan 4s 2020. Best car i have ever had.
i chose the pscb brakes for their durability.
I just came back from porsche service with the news that my rear brakes are rusted. I have about 30k of miles om my Taycan.
Porsche is advertising that pscb cant rust.
But now they want to charge me 4.900 euros for rusted brakes.
Am i getting scammed by porsche.

note. This is at an legitimate porsche service center

This is very surprising but it mean that you have a very low mileage.
Do you have picture of it. I also think that many hard slow down with a fully charged battery will gets Rolodex of the oxidation.

 

[MTGBUK]

Definately doesn't look fully run in. PSCB are usually mirror finish when fully run in. Looks like a build up of fallout. Clean you wheels and rotors with some iron and fallout remover. Turning purple is a sign of fallout. Common issue with white cars are little orange spots which look like rust after washing. Bit of fallout remover gets rid of them.

 

[alexsas]

As everyone has already said, something is not right here. The most "not right" is that a Porsche centre is telling you this rubbish... Get them to confirm this in writing, investigate the true cause and complain bitterly to Porsche NL (or whatever thing you have in Europe).

My almost 4-year-old discs are shining like new, and the car deactivates regeneration now and then to polish the discs a little...

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