TSB: Brake Pedal Travel Perceived as “Too Long” Just Before the Vehicle Comes to a Standstill - Mar 23, 2026 updated

[Tooney]

Symptom: The customer complains that the brake pedal travel is subjectively perceived as “too long” just before the vehicle comes to a standstill (< 12 km/h (7.5 mph)).

• Generally, pedal travel is longer when manoeuvring at slow speeds.
In order to improve the metering action of the brakes while parking, a small brake master cylinder (HBZ)
is installed in the Taycan compared with the PHEV vehicles, which extends the pedal travel in order to
guarantee better metering when parking and manoeuvring. In addition, both brake circuits are opened
fully at speeds of < 12 km/h (7.5 mph) for noise, vibration and other comfort reasons, which also results
in longer pedal travel. When beginning braking at speeds below 12 km/h (7.5 mph), no recuperation is
possible.

• Poor friction coefficient of Porsche Ceramic Composite Brake (PCCB) and Porsche Surface Coated Brake (PSCB) compared to grey cast iron brakes in wet and/or cold weather conditions.
This effect can adjust when switching from electric to hydraulic braking. This can result in a change in brake pedal feel during braking with the same pedal pressure. Furthermore, it must generally be ensured that after checking the possible causes listed above, the latest software for the vehicle in question is installed on the PSM control unit.

• Old software version in the PSM control unit
A new software version is available for the PSM control unit since June 16, 2023. This software update improves the functionality of the PSM hydraulic unit to optimize performance and enhance the brake pedal feel over a longer period of time.
https://static.nhtsa.gov/odi/tsbs/2023/MC-10240398-0001.pdf

EDIT: updated TSB Feb 9, 2024: https://static.nhtsa.gov/odi/tsbs/2024/MC-10251168-0001.pdf
EDIT: updated TSB Mar 27, 2025: https://static.nhtsa.gov/odi/tsbs/2025/MC-11016718-0001.pdf
EDIT: updated TSB Mar 23, 2026: https://static.nhtsa.gov/odi/tsbs/2026/MC-11030877-0001.pdf

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[Fall7St8nd]

Can confirm... and have just gotten used to pressing the pedal deeper when coming to a stop.

On my daily commute, there's a residential road with a stop sign at the bottom of a steep decline... I'm getting used to the pedal travel, feeling the transition from engine braking to (PSCB) caliper engagement, and coming to a smooth stop.

 

[or1]

• Generally, pedal travel is longer when manoeuvring at slow speeds.
In order to improve the metering action of the brakes while parking, a small brake master cylinder (HBZ)
is installed in the Taycan compared with the PHEV vehicles, which extends the pedal travel in order to
guarantee better metering when parking and manoeuvring. In addition, both brake circuits are opened
fully at speeds of < 12 km/h (7.5 mph) for noise, vibration and other comfort reasons, which also results
in longer pedal travel. When beginning braking at speeds below 12 km/h (7.5 mph), no recuperation is
possible.

This matches what I have felt in both my present Taycan GTS and my previous Audi RS e-tron GT. I would without the explanation indeed describe it as a fault. Reading about Porsche's intention now of achieving better "metering" at the slowest speeds, I think I will no longer be bothered by it.

It would have been great to have this information when I received the car, though.

 

[Jenner]

Symptom: The customer complains that the brake pedal travel is subjectively perceived as “too long” just before the vehicle comes to a standstill (< 12 km/h (7.5 mph)).

• Old software version in the PSM control unit
A new software version is available for the PSM control unit since June 16, 2023. This software update improves the functionality of the PSM hydraulic unit to optimize performance and enhance the brake pedal feel over a longer period of time.
https://static.nhtsa.gov/odi/tsbs/2023/MC-10240398-0001.pdf

2 weeks ago I dropped off my '21 Turbo S for the exact symptom above and gave them an older TSB from 2022. They were able to replicate the issue and went directly to Porsche Germany for guidance. They were told to load the new software but my PSM unit wouldn't take the new code. They had to order a new PSM unit, hopefully arriving any day now. Will post an update on how it feels after I get it back.

Off topic: I absolutely hate the brand new '23 Panamera 4 Platinum Edition they gave me as a loaner! I cannot understand who would buy a Panamera over the Taycan nor why they hold their value better than the Taycan. It is worse in every single metric to me (EXCEPT for brake pedal feel ) and I cannot wait to get my Taycan back.

 

[SergeyIndy]

Can confirm the same that caught me completely off guard trying to stop and pressing the brake pedal normally but the car would not be slowing down fast enough requiring very deep push of the brake pedal that felt unnatural, so I was coming to the car in front of me way too close.

Mine was built in April (2023) and delivered late June (22nd) with all software updates showing up to date but only 500 miles on it, so I was just thinking this is too early to complain about something like this.

Question: How to confirm that the PSM software update addressing this issue is installed?

 

[McgR]

I am fine with this feeling. But you have to know it. I have been doing mountain roads the past days and it brakes really good with the normal brakes. Completely different feeling compared to stopping at a red light at home.

However if occasionally drive our Mercedes PHEV the first few brakes at red lights I give the entire family a whiplash.

I guess the issue especially arises when driving different cars on daily base.

 

[JWreck]

So I may have had a couple old fashioneds tonight, but are they saying “this is why it is how it is and F you” or are they say it the fix is simply a software upgrade that reduces pedal travel?

Because I would 100% drive it down there to drop it off and leave it for the fix. I think speccing the normal brakes was a mistake on an otherwise remarkable car. If this improves pedal feel I’m game!

 

[Jenner]

Question: How to confirm that the PSM software update addressing this issue is installed?

the fix is simply a software upgrade that reduces pedal travel?

Because I would 100% drive it down there to drop it off and leave it for the fix.

If this improves pedal feel I’m game!

My answer to both of you is that hopefully I can give you (and all the others experiencing this issue) an answer very soon.

I am supposed to get my Taycan back with a new PSM module with new software in the next few days. The module came in last week and they loaded the new code and put everything back together. Porsche requires them to test it before they give it back to me, and I will post my feedback here as soon as possible.

 

[JWreck]

My answer to both of you is that hopefully I can give you (and all the others experiencing this issue) an answer very soon.

I am supposed to get my Taycan back with a new PSM module with new software in the next few days. The module came in last week and they loaded the new code and put everything back together. Porsche requires them to test it before they give it back to me, and I will post my feedback here as soon as possible.

Looking forward to it!

 

[Alfa]

Can confirm that muscle memory needs some time to adjust, but you learn quickly when the car suddenly decides: Emergency Braking while the pedal moves away from under your feet. It was dry and still lots of space when the car in front of me did some weird braking maneuver to turn.

 

[YWGT3]

I experienced the same issues. My Taycan's brake system, over time, exhibited less grip, a tendency to lurch, and longer pedal travel, requiring earlier anticipation and significant pedal pressure in order to bring the vehicle to a stop. My Porsche SA was able to replicate the braking behaviors and determined the cause was attributed to a faulty brake booster. I haven't experienced the aforementioned issues since the brake booster was replaced.

 

[npx]

Can confirm... and have just gotten used to pressing the pedal deeper when coming to a stop.

On my daily commute, there's a residential road with a stop sign at the bottom of a steep decline... I'm getting used to the pedal travel, feeling the transition from engine braking to (PSCB) caliper engagement, and coming to a smooth stop.

same! glad I'm not alone, it can be very jarring when the software gets it wrong, my foot goes to the floor and at the bottom of the incline, it's like the software goes HOLY FUCK and absolutely slams on the brakes while my foot is most of the way down.

 

[Jenner]

Picking it up tomorrow morning after Porsche service replaced the PSM control unit and loaded latest code per the July 18 2023 TSB posted on page 1.

They also replaced the ABS control unit/brake booster part number PO9J1-614-095-RY

Here is the information I have so far:

 

[Jenner]

Got it back this morning and it feels 1000x better than before. I hope it stays this way now. Pedal travel in all braking conditions is short and firm. Even on the highway using only a small amount of brake travel gets a ton of regen braking both felt (g forces) and shown on the power meter. I hope it stays this way now!

It still feels like a Taycan, meaning there will always be regen braking, blending braking and mechanical braking. It will never feel like a 911 (much lighter and no blending braking) but it feels good and the way you expect it to.

Assuming you don't need a new PSM unit (ie yours accepts the new code that came out as of July 2023) then it could just be a software fix, they did this first and then a new PSM unit was needed since mine wouldn't take the code (was not given a reason why). If that doesn't fix it then a new brake booster/ABS control unit is needed to go with it as well. So your "fix" might not be as long or complicated as mine.

A little scary to think what this would have cost without a warranty but I guess that's the price of being an early adopter.

Biggest takeaway/surprise for me from these 3 weeks without it is how much I dislike the Panamera and as similar as they seem they are SO different. I cannot describe how much sportier and more 911 like the Taycan feels vs the Panamera. The only other time I drove one was a 2015 GTS model (back when it was a V8) on a race track during a Porsche World Roadshow event and I don't recall that one feeling as bad as this brand new '23 Panamera 4 Platinum Edition. It was eye opening to see how different the two Porsche Sedans feel even if they share similar parts and DNA.

Thrilled to be back in my Taycan. Hope others suffering from this brake issue can get resolution. Print out the TSB linked on page 1 and bring it with you and you should have no issue getting it fixed.

 

[JWreck]

I’m going to my SA tomorrow to compare and have someone drive it too. I’ve complained about it before so hopefully we can sort it out.

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