Red Caliper and Rust on Winter time...

[CryMtl]

Only one winter. Porsche changed my Rotors, Pads after 7 000 km...
Im living in Canada so in the Winter my Disk are getting rust. I have Red Caliper. I cannot understand why Porsche put no-coated disk... The solution is to brake with the real disk on low speed but everything time the regen kick... I would need an option to totally deactivate the regen... I try to call Porsche Connect to complaint and they told me there is nothing they can DO. I need to go back in Porsche to ask the technician to open a ticket in Porsche.

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[f1eng]

My car disables regen braking for a while every day so the pads clean up the discs.
That is supposed to be standard and works fine on my car.

Also at lower speed the rotors are used for braking rather than regen - I’m not sure what speed though, if you commute in traffic I guess they would be used quite a bit.

I am surprised they got rusty enough to need changing, cast iron discs give the most consistent braking with temperature so i prefer them but they do get a bit of rust.

I have never had to change discs due to rust on a car yet though.

 

[Porsche-Guru]

Only one winter. Porsche changed my Rotors, Pads after 7 000 km...
Im living in Canada so in the Winter my Disk are getting rust. I have Red Caliper. I cannot understand why Porsche put no-coated disk... The solution is to brake with the real disk on low speed but everything time the regen kick... I would need an option to totally deactivate the regen... I try to call Porsche Connect to complaint and they told me there is nothing they can DO. I need to go back in Porsche to ask the technician to open a ticket in Porsche.

Just repeat 'get up to speed and then hard braking' a few times... this should clean up the discs.

Try and do this every time you drive for a few days... and then see if the rust conditions return.

 

[Crazymind]

In recent years it’s quite common in the car industry. I had the same issue on my I-Pace. After one winter and despite the car living in a Garage…
My Jaguar before that, BMW and Vw all the same.
Most people don’t even notice it. Or just don’t care because it’s a leased car.
Coated brakes last slightly more in winter condition but the surface coating is removed after a few miles of driving/braking.
However rust doesn’t run as fast around and at the back of the disc when they are coated.

 

[bluesky]

My BMW rotors and the Corvette too also rust when I wash the cars. Backing out of the driveway makes some cringing sounds with the rust, but it is cleaned off in driving just a couple minutes. That’s just how it is.

 

[Archimedes]

It’s surface rust. Non issue.

 

[W1NGE]

Only one winter. Porsche changed my Rotors, Pads after 7 000 km...
Im living in Canada so in the Winter my Disk are getting rust. I have Red Caliper. I cannot understand why Porsche put no-coated disk... The solution is to brake with the real disk on low speed but everything time the regen kick... I would need an option to totally deactivate the regen... I try to call Porsche Connect to complaint and they told me there is nothing they can DO. I need to go back in Porsche to ask the technician to open a ticket in Porsche.

The PSCB brakes (optional) are coated.

Regen not available on first start up of the day for at least a mile. Use this period to clear the disc surface.

Hard braking also works at any time

 

[whitex]

As other have said, car is supposed to disable regen blending for a short time to clean the rust. My Taycan does it every once in a while - not quite every day as others have pointed out, but a few times a week. I have PSCB's.

If you really want to force disable regen, charge to 100% SoC, regen will be very limited at the start of a drive. Hard braking, especially with a cold battery, should also engage physical brakes.

 

[f1eng]

In recent years it’s quite common in the car industry. I had the same issue on my I-Pace. After one winter and despite the car living in a Garage…
My Jaguar before that, BMW and Vw all the same.
Most people don’t even notice it. Or just don’t care because it’s a leased car.
Coated brakes last slightly more in winter condition but the surface coating is removed after a few miles of driving/braking.
However rust doesn’t run as fast around and at the back of the disc when they are coated.

Rust is normal and unavoidable on cast iron brake discs.

Cast Iron has the most consistent friction coefficient so it is the best choice for brake rotors (composite ones are nearly as good these days, much lighter but very expensive for a road car).
Stainless steel is often used on motorcycles for cosmetic reasons but it has poor braking qualities so the cosmetics not worth it in my opinion.

I have no experience of the Porsche coated discs which will be cosmetically nicer and are bigger with bigger calipers - whether that is to compensate for lower friction or just better for track days I don’t know (maybe a bit of both).

 

[W1NGE]

Rust is normal and unavoidable on cast iron brake discs.

Cast Iron has the most consistent friction coefficient so it is the best choice for brake rotors (composite ones are nearly as good these days, much lighter but very expensive for a road car).
Stainless steel is often used on motorcycles for cosmetic reasons but it has poor braking qualities so the cosmetics not worth it in my opinion.

I have no experience of the Porsche coated discs which will be cosmetically nicer and are bigger with bigger calipers - whether that is to compensate for lower friction or just better for track days I don’t know (maybe a bit of both).

No rust on PSCB that I have noticed which is what I'd expect.

 

[f1eng]

which is what I'd expect.

me too

 

[Crazymind]

When talking Porsche you would expect that level of quality. My 986 after 5 years and 30k miles was still on original disks and minimal rust surface at the back of the disc. No rust anywhere else.

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