Brake replacement for 2020 Taycan 4S

[Schlossj]

It likely is still this “phantom screeching” sounds others have reported at low speed and in some cases no braking at all. I even found a Porsche service bulletin that suggested front disc and pad replacement to solve for the noise regardless of brake wear. So I may just be chasing “the phantom” to rid myself of an annoying sound that shows up mostly when stopping at a light.

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[Caraholic]

I highly doubt your brakes need replacing. These brakes should damn near last the life of the car unless your tracking. The vast vast majority of breaking you are doing is not even using the brakes.

 

[4NIQUES]

Do your brakes need to be changed already or are you just inquiring? I inquired in Canada and Porsche told me 10K but also told me I wouldn't need brakes for possibly the 'life of the car' (140,000 km)

 

[Schlossj]

Do your brakes need to be changed already or are you just inquiring? I inquired in Canada and Porsche told me 10K but also told me I wouldn't need brakes for possibly the 'life of the car' (140,000 km)

I’m inquiring as to others experience. Haven’t officially been told I need new brakes.

 

[Jenner]

@Schlossj

What is your use/type of driving? Commuting to work? Daily driver?

For a Porsche/performance car brake squeal is normal/expected to occur when the car is used as an "around town" or "commuter" car. It can and will happen with almost any performance vehicle (that has high performance brakes) when driven this way. This applies to ALL performance rotors be it the base cast iron, the PSCB or the PCCB rotors.

I can tell how you drive just by looking at your rotors and so can you!

Here is what PSCBs look like with too much slow driving/no heavy braking and/or haven't been bedded in properly:

And here is what they look like after they have been used hard and bedded in properly. "Bedded in" means some of the brake pad is "stuck" to the rotor. You can see this with the blue/grey deposits on the rotor in the picture below:

If they are not blue/grey then you need to go out and get up to 60-80mph someplace safe and brake HARD down to ~25-30mph, but do NOT get into ABS braking and do NOT come to a full stop! Do this several times in a row allowing a period of cool down in between each hard stop. A quick google search will also provide more info on this technique.

This should fix the squeal for a period of time, but going back to A-B around town driving or highway driving with infrequent use of the brakes will cause the deposits to be scrapped off over time (they get deposited when the brakes heat up and get removed when the brakes are cold) So you may need to repeat this process again from time to time (OR just drive it like you stole it all the time!).

According to Porsche the PSCB should last 100k on an ICE car that has to use it's brakes 100% of the time. They should last the lifetime of the Taycan since it does so much braking via regen in advance of using the mechanical brakes. Unless your Taycan has been tracked hard for many many miles, anyone trying to sell you brake rotors at 20k miles is trying to rob you.

HTH!

 

[4NIQUES]

You can have anyone service your brakes without impacting any warranty coverage. That said they have to do a professional job. I would reach out to the local chapter of the Porsche club. There are plenty of Porsche specialists that could service your brakes. For that kind of money I'd take the car somewhere local and just have them do a brake inspection. Pull the wheels and check the friction material thickness on all the inner and outer pads. Half an hour of labor (+/-) to satisfy yourself that the work needs to be done. 24,000 miles seems like very low mileage to need front and rear brakes on an EV. It would be low on almost any ICE vehicle for that matter.

True. on my BMW's I replaced pads only at 80,000 km - so yes this is quite low for a brake pad replacement

 

[r553]

The Taycan maintenance schedule wants the pads changed at six years due to possible corrosion due to lack of use. An inspection ought to work to see if the pads have corrosion. I stayed with the iron brake setup in my 4S to reduce maintenance costs.

 

[Vercingetorix]

I agree with @Hirschaj - this is way too low of a mileage for disc replacement. I'm at 20k miles and the pads have lost 1-3mm at most (standard brakes, not P*CB). Even if you use the hydraulic brakes a lot, it would seem premature to replace the discs.

@Vercingetorix - you stated above that the PSCB system requires tandem replacement of pads and discs; any references you can share?

I remember reading that somewhere. Could be dealers just playing it safe. The Tungsten surface is only .1mm thick.

 

[whitex]

Have only changed the fronts and really only because I lost one to a pot hole and the other was close enough to replacement depths.

There is no way you worn your brakes out before your first set of tires.

 

[Jhenson29]

23.7K and no tracking or extreme “tear-assing”…

What about moderate “tear-assing”?

 

[Schlossj]

What about moderate “tear-assing”?

Not nearly enough “tear-assing”…actually more long distance highway driving…supporting the hypothesis that the discs are “too smooth”…gonna beat them up this weekend with the 80-30 brake stands and see what happens!

 

[WasserGKuehlt]

Not nearly enough “tear-assing”…actually more long distance highway driving…supporting the hypothesis that the discs are “too smooth”…gonna beat them up this weekend with the 80-30 brake stands and see what happens!

Italian tuning ftw.

To complement @Jenner’s excellent post, there is a graph posted around here that shows the brake behavior (hydraulic vs electric) as a function of speed and requested deceleration. (So that you can stay in the hydraulic band and avoid locking.)

 

[j.w.s]

Hi - has anyone replaced their Taycan 4S brakes and what did you pay? Trying to see if estimates I've received ($9K and up for front and rear) are accurate. Did anyone use a non-Porsche shop? Any concerns with using a non-Porsche shop I should consider (although they would still use factory equipment)? Thanks!

If you do end up needing new PSCB rotors with <30K miles, then either something else is seriously wrong or a ton of us PSCB owners will get really miffed at seeing the incredibly short lifespan of those fancy rotors. I very much suspect the former. I fully expect my PSCB rotors to outlast many sets of tires, and for the pads to be replaced at six years for age reasons alone, not wear.

 

[JWreck]

Have you not…looked yourself? You can catch a glimpse of the pad life without taking the wheels off.

 

[Schlossj]

@Schlossj

What is your use/type of driving? Commuting to work? Daily driver?

For a Porsche/performance car brake squeal is normal/expected to occur when the car is used as an "around town" or "commuter" car. It can and will happen with almost any performance vehicle (that has high performance brakes) when driven this way. This applies to ALL performance rotors be it the base cast iron, the PSCB or the PCCB rotors.

I can tell how you drive just by looking at your rotors and so can you!

Here is what PSCBs look like with too much slow driving/no heavy braking and/or haven't been bedded in properly:

And here is what they look like after they have been used hard and bedded in properly. "Bedded in" means some of the brake pad is "stuck" to the rotor. You can see this with the blue/grey deposits on the rotor in the picture below:

If they are not blue/grey then you need to go out and get up to 60-80mph someplace safe and brake HARD down to ~25-30mph, but do NOT get into ABS braking and do NOT come to a full stop! Do this several times in a row allowing a period of cool down in between each hard stop. A quick google search will also provide more info on this technique.

This should fix the squeal for a period of time, but going back to A-B around town driving or highway driving with infrequent use of the brakes will cause the deposits to be scrapped off over time (they get deposited when the brakes heat up and get removed when the brakes are cold) So you may need to repeat this process again from time to time (OR just drive it like you stole it all the time!).

According to Porsche the PSCB should last 100k on an ICE car that has to use it's brakes 100% of the time. They should last the lifetime of the Taycan since it does so much braking via regen in advance of using the mechanical brakes. Unless your Taycan has been tracked hard for many many miles, anyone trying to sell you brake rotors at 20k miles is trying to rob you.

HTH!

@Jenner THANK YOU. I went out and did the brake stands (4-5 times - 80 down to 30) - and problem is solved! Squeak is gone. Brakes actually feel better. And I now see some of the deposits on the rotor. Really appreciate this guidance.
For completeness, had the brakes inspected and as expected they are fine - actually “look rather new”…so there you go. You have to beat PSCB’s up every once in a while for ideal squeal-free performance!

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