Brake pad wear

[BigBob]

It still wouldn't explain the wear in 3.5K miles. How many cars have you had that needed brake pad replacement this early no matter how you drive?

My Boxster S.is still on the original pads and disks from new (10 years old now , 22K miles).

I really think this is a cock up or a component failure / not within spec.

Agreed. Just wondering if there is an issue with regenerative braking, it could somehow be causing addition wear.

The simplest (and best outcome) explanation is they haven't taken the measurements properly. Either that or Tino likes to rest his left foot on the pedal!

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[Bognar67]

Their wear calculation is wrong. The front and rear pads start with a 10mm thickness (15.0mm total with backing plate). It should be 90% pad life front and 70% left rear, to do the obvious calculation...

Even so, that's a high amount of wear if their measurements are correct. I was still measuring about 10mm all around (essentially 100% after my first 7k miles.). Besides a track event, I actually haven't had measurable wear in my brake pads in the 7k miles after that track day. I just hit about 14.5kmiles and measured last week.

I also wouldn't trust the measurements very much either, I've had measurements from the service center that don't match my actual measurements at all. You can ask them to measure again and if they're correct, there may be some other problem. Or just wait until your next service/recall/update and ask them to take the measurement more accurately.

Well, it depends on how they calculate zero %. 0% of brake pad state could be at 2 mm not 0 mm as a basis of the service calculation. On the other hand in this case brand new pad"s state is 80% ...

Anyway torque vectoring system is eating the rear pads at spirited drive like hell since the inner rear wheel braking generates the yaw effect in each corner. So working not (only) on braking, but fast cornering. It helps to reduce understeer and the heavy Taycan needs lot of help...

On my 911 C4 I used lot of rear pads 3/1 rear/front next to highly sporty drive and some track use.

In my case after 5,5k km front pads are like new 10mm rears only 7mm. Similar milage similar brake wear. No tracking but lot of fast cornering.

NOTE: Porsche Torque Vectoring Plus is an option below GTS trim (GTS, Turbo, Turbo S standard)

 

[NuJerzPorsche]

Sounds like a money grab to me

 

[Bognar67]

I don't think so unless you are standing on the brakes!

95% of braking is via the motors and not the pads remember.

Well, it is not a percentage but a g-force thing. Up to 0,4g decelerating force the motor(s) brake(s), above it the brakes step in. So if somebody brakes relatively heavily (above 0,4g) frequently the brakes used much more than 5%.

Additionally regenerative braking is switched off frequently to maintain the brakes. This is the case when you brake but no green line to the left in the Power Meter. It happens almost every start up the car.
So lot of short distance drive also increases the brake use.

Added with the effect of the PTV Plus system I already mentioned.

 

[TDinDC]

My thinking exactly!

I am not entirely sure this is true. Tires wear due to friction caused by application of force on the tire, while brake wear is due to friction caused by application of force on the brake pads. So, heavy braking could certainly cause heavy tire wear, but you can imagine someone riding the brakes while going down a hill could wear the brakes despite there not being as much force on the tires. This could also happen in corners, etc., where there is less force on the tires than on the brake pads themselves. This could also be due to traction control (or even malfunctioning of traction control). but that brake wear seems like a mis-measurement or miscalculation given the low miles. If it were a malfunction, I would expect to see uneven wear tied to the malfunction

 

[tomahawkBE]

I've taken my car in for the big software uPdate and the guys at the garage had a check over the car. The car has only done 3500 Miles so I was surprised that they found the brake pads showed 35% wear on front pads and 55% wear on rears. That can't be correct, can it?
Tyre wear is minimal and I don't drive the car like a lunatic!

They told me when I ordered that most of the time the brake pads have to be replaced because they are too old and not yet worn out on Taycan's. At least in regular day to day usage of the car.

So that would be really odd.

 

[Pete85]

I dont think that wear is possible with such low kilometres. I just picked my car up yesterday from the 30 000 km service (also software update was installed) and they said brake pads were in very good shape. I definitely do not drive slow and also have been driving 2 summers in the Alps for a total of 3 months. They even said that with that wear they do not need replacement after 60k.....

btw super happy so far with the update ?

 

[Tino82]

Well, it depends on how they calculate zero %. 0% of brake pad state could be at 2 mm not 0 mm as a basis of the service calculation. On the other hand in this case brand new pad"s state is 80% ...

Anyway torque vectoring system is eating the rear pads at spirited drive like hell since the inner rear wheel braking generates the yaw effect in each corner. So working not (only) on braking, but fast cornering. It helps to reduce understeer and the heavy Taycan needs lot of help...

On my 911 C4 I used lot of rear pads 3/1 rear/front next to highly sporty drive and some track use.

In my case after 5,5k km front pads are like new 10mm rears only 7mm. Similar milage similar brake wear. No tracking but lot of fast cornering.

NOTE: Porsche Torque Vectoring Plus is an option below GTS trim (GTS, Turbo, Turbo S standard)

Thanks. I don't have ptv+ but I do have rear wheel steering.

 

[Bognar67]

Thanks. I don't have ptv+ but I do have rear wheel steering.

RWS should not influence the break pad wear.
All in all front pads are nearly new 10/9mm rears 7/10mm if it is true originally both are 10mm. Maybe rears when new only 8mm in this case 1mm wear front and rear can be a measurement tolerance. I usually see fatter front pads when new.
My GTS has similar mm-s with similar mileage as I mentioned.
Percentages are just numbers. Should be not changed up to 2-3mm remaining pads.

 

[Bognar67]

Just received these infos next to photos from my local Porsche Service Adviser:
- Front pads when new: 9mm. - So yours are like a new ones.

- Rear pads when new: 8mm - So yours are almost like a new ones if taking 0,5-1mm measuring tolerance.

Percentages on the list are absolutely wrong. Front ca. 0% worn, Rear ca. 12% worn.

 

[Scandinavian]

Just received these infos next to photos from my local Porsche Service Adviser:
- Front pads when new: 9mm. - So yours are like a new ones.

- Rear pads when new: 8mm - So yours are almost like a new ones if taking 0,5-1mm measuring tolerance.

Very nice that your dealer helped out with this information!
However it is sad to see the information the OP got from his dealer. Can understand that he got concerned with so little mileage and so wrong information in % terms. Luckily the mm measurements were also given.

 

[Bognar67]

Very nice that your dealer helped out with this information!
However it is sad to see the information the OP got from his dealer. Can understand that he got concerned with so little mileage and so wrong information in % terms. Luckily the mm measurements were also given.

Yes, this the advantage of a small market. Personalized relationship building up easier.
Just called him with this request, and sent back the photos and measurements in 30 minutes, lunch time...

 

[Bognar67]

They told me when I ordered that most of the time the brake pads have to be replaced because they are too old and not yet worn out on Taycan's. At least in regular day to day usage of the car.

So that would be really odd.

According to Porsche, Taycan's break pad life time is 6 years independently from the worn status. At this stage they change them with safety reason I mean making money.

 

[Tino82]

Just received these infos next to photos from my local Porsche Service Adviser:
- Front pads when new: 9mm. - So yours are like a new ones.

- Rear pads when new: 8mm - So yours are almost like a new ones if taking 0,5-1mm measuring tolerance.

Percentages on the list are absolutely wrong. Front ca. 0% worn, Rear ca. 12% worn.

Thanks for the information and photos. That was good of your Adviser!

 

[Chris8536]

All this talk and it’s obviously one of two things:
1) dealer can’t measure pads correctly and is stupid as dirt
2)SOP at this dealer is to lie about pads and scam clients

In my experience with Porsche dealers it’s likely either. But in any case why deal with these idiots ever again. They are either too stupid to measure a brake pad correctly or scammers. Why would you want either working on your very complex vehicle? F em.

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