MY26 software update (week 36) for MY24-25

[CHP]

https://static.nhtsa.gov/odi/tsbs/2025/MC-11016767-0001.pdf

ByeBye mentioned WSD0, forgot what this update was so searched for it. Found more detailed technical note from Porsche. Have a look at page 7 and 8. Jesus, explains a lot. Seems dealers keeping us in the dark, they know exactly the source/modules affected. In my case, both faults (two Macan) relate to system failures mentioned. How I see this, it’s hardware related as otherwise all would have similar problems. In my world, that’s simply treating symptoms instead of rectifying cause.

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[FirstEV]

https://static.nhtsa.gov/odi/tsbs/2025/MC-11016767-0001.pdf

ByeBye mentioned WSD0, forgot what this update was so searched for it. Found more detailed technical note from Porsche. Have a look at page 7 and 8. Jesus, explains a lot. Seems dealers keeping us in the dark, they know exactly the source/modules affected. In my case, both faults (two Macan) relate to system failures mentioned. How I see this, it’s hardware related as otherwise all would have similar problems. In my world, that’s simply treating symptoms instead of rectifying cause.

So.. as mentioned before by many, the software update almost feel like a cover up for it. The issues will probably stay persistent after it, unless the change the hardware. Great..

 

[CHP]

So.. as mentioned before by many, the software update almost feel like a cover up for it. The issues will probably stay persistent after it, unless the change the hardware. Great..

I can reject my car (again) but this time I will insist on repair, exchange or buy back. Let’s see what happens. I sent an official letter from my company via email on Thursday stating the above - no reply.

 

[CHP]

As only few affected, they are trying to sit it out. I assume they are unable to reliably identify out of spec/malfunctioning modules. Changing some modules for those assumed few affected would not be the end of the world unless they are aware that the problem is more widespread and potentially would result in larger, very costly campaign. Electric cars not selling to well at the moment and after problems with Taycan, this would be a PR disaster. Don’t think many would by first model year of Cayenne EV after this.

 

[MatC21]

Calm down guys, you are really underestimating the power and responsibility of the software here.
Yes there are hardware modules involved but I tell you, most likely all these issues can be solved with Software.
These modules/units are highly programmable, Software issues are just way more common. How often do you hear about bugs in Intel processors compared to Windows?

And even if the hardware has some suboptimalities there might be Software workarounds.

it is a shame Porsche has not fixed these issues just yet, but that doesn’t mean they never will.

 

[CHP]

Calm down guys, you are really underestimating the power and responsibility of the software here.
Yes there are hardware modules involved but I tell you, most likely all these issues can be solved with Software.
These modules/units are highly programmable, Software issues are just way more common. How often do you hear about bugs in Intel processors compared to Windows?

And even if the hardware has some suboptimalities there might be Software workarounds.

it is a shame Porsche has not fixed these issues just yet, but that doesn’t mean they never will.

Most recent in history of Intel faults affects 13th and 14th gen Intel processor. There is a bios update to delay severe damages.

As I said, Porsche is patching up symptoms and is hoping for the best. In my world (duty of candour), we have to be open, transparent and provide truthful information.

I like to think that those with similar longstanding problems would agree that the process is far from being transparent. In my case, I like to think they are not open and truthful either as they are withholding information. In my case they refuse to return the car as I insist on written confirmation on a) identified fault, b) how this fault/s has/have been addressed and c) likelihood of reoccurrence (pending on a and b obviously).

 

[daveo4EV]

https://static.nhtsa.gov/odi/tsbs/2025/MC-11016767-0001.pdf

ByeBye mentioned WSD0, forgot what this update was so searched for it. Found more detailed technical note from Porsche. Have a look at page 7 and 8. Jesus, explains a lot. Seems dealers keeping us in the dark, they know exactly the source/modules affected. In my case, both faults (two Macan) relate to system failures mentioned. How I see this, it’s hardware related as otherwise all would have similar problems. In my world, that’s simply treating symptoms instead of rectifying cause.

and people wonder why Porsche can't do OTA updates - or continue to insist that they can…

from the tech article…
12V external power supply required during the update process

Battery charger with a current rating of at least 90 A, e.g., VAS 5908 - 90-A battery charger.

Sitting inside the vehicle during the update

• Abort update by automatically activating the ignition

Þ Avoid sitting inside the vehicle during the update.

read the requirements below for what is necessary during the update process…

 

[FirstEV]

Update from my dealer (2025-10-27, Week 44)

Just got some new info today — the dealer was informed this past Friday (apparently from Germany) that the new software update is scheduled to be released to dealers next week.

The update itself takes at least 3 hours to install, and before applying it to customer cars, dealers have to test it on their own vehicles first to make sure everything runs smoothly.

He mentioned that this release seems pretty serious this time — the delay before was due to some major bugs in the software, but it sounds like they’ve been resolved. Unless something big comes up again, it should finally be released soon.

If you haven’t already, get in touch with your dealer. This is a major update, so it’s worth securing a slot or at least asking them to give you a call once it’s available.

 

[W1NGE]

Update from my dealer (2025-10-27, Week 44)

Just got some new info today — the dealer was informed this past Friday (apparently from Germany) that the new software update is scheduled to be released to dealers next week.

The update itself takes at least 3 hours to install, and before applying it to customer cars, dealers have to test it on their own vehicles first to make sure everything runs smoothly.

He mentioned that this release seems pretty serious this time — the delay before was due to some major bugs in the software, but it sounds like they’ve been resolved. Unless something big comes up again, it should finally be released soon.

If you haven’t already, get in touch with your dealer. This is a major update, so it’s worth securing a slot or at least asking them to give you a call once it’s available.

Let the dealer contact the owners - normally by mail / email and possibly via My Porsche app.

 

[CHP]

Update from my dealer (2025-10-27, Week 44)

Just got some new info today — the dealer was informed this past Friday (apparently from Germany) that the new software update is scheduled to be released to dealers next week.

The update itself takes at least 3 hours to install, and before applying it to customer cars, dealers have to test it on their own vehicles first to make sure everything runs smoothly.

He mentioned that this release seems pretty serious this time — the delay before was due to some major bugs in the software, but it sounds like they’ve been resolved. Unless something big comes up again, it should finally be released soon.

If you haven’t already, get in touch with your dealer. This is a major update, so it’s worth securing a slot or at least asking them to give you a call once it’s available.

 

[CHP]

Thank you very much for the update on „The“ update. Explains why I haven’t heard back from dealer so far. Found some supercharger around (super expensive, Porsche RF card doesn’t work. Charged a few times already as I average 40 kW per 100 miles. Sport mode, driving experience is stellar.

 

[dgkhn]

https://static.nhtsa.gov/odi/tsbs/2025/MC-11016767-0001.pdf

ByeBye mentioned WSD0, forgot what this update was so searched for it. Found more detailed technical note from Porsche. Have a look at page 7 and 8. Jesus, explains a lot. Seems dealers keeping us in the dark, they know exactly the source/modules affected. In my case, both faults (two Macan) relate to system failures mentioned. How I see this, it’s hardware related as otherwise all would have similar problems. In my world, that’s simply treating symptoms instead of rectifying cause.

Thank you for posting the link.

What I say below is pure speculation, as even superficially understanding the hardware and software systems in these cars is way beyond my limited experience. But I do speak as someone who has written and debugged software, albeit primarily in linear and predictably branching systems.

That said, basic logic suggests that the fact that only a fraction of cars experience these problems, and that many cars display transient warnings, while presumably we all have the same software (pre update), says to me that the software is not sufficiently robust to deal with the wide range of circumstances it must deal with. What I mean by this is, clearly there are many interacting systems, resulting in almost an infinite variety of events, signals and their timing. Plus there is a very high standard of safe behavior by the systems. And we are working with at least some systems (I'm thinking the battery cells especially) whose states and capacities are not 100% predictable.

I do believe that the majority of problems are a combination of underlying hardware faults that are not properly handled by the software. I think there are two points here. One is, some of the problems will not be fixed by software updates, which are not magic pills. Two is, software fixes CAN correct some of the problems, not necessarily as covering up symptoms but rather better handling scenarios that the software designers had not previously properly accounted for.

i have to say, the apparent fragility of the update process itself is a little offputting, and I agree that implies the likelihood of significant OTA updates on these cars seems nil.

I would say, if a dealer says, "that will be fixed by a software update," that statement is more hope than fact, but that doesn't mean it's not true.

 

[PrudentOcean]

The complicated software update process is likely due to there being a large number of separate controllers that have to be updated in a specific order to ensure they are in a compatible state. Other companies like Tesla and Rivian have architected their cars with a small number of domain controllers that can be updated independently.

But the need for a reliable external power source in some ways is no different than what we all go through with other devices when updating firmware. There are admonishments about not turning devices off or restarting them during the update process, and things like iPhones won't start the update process unless the battery is at least at 50% or the device is on a charger.

 

[W1NGE]

Thank you for posting the link.

What I say below is pure speculation, as even superficially understanding the hardware and software systems in these cars is way beyond my limited experience. But I do speak as someone who has written and debugged software, albeit primarily in linear and predictably branching systems.

That said, basic logic suggests that the fact that only a fraction of cars experience these problems, and that many cars display transient warnings, while presumably we all have the same software (pre update), says to me that the software is not sufficiently robust to deal with the wide range of circumstances it must deal with. What I mean by this is, clearly there are many interacting systems, resulting in almost an infinite variety of events, signals and their timing. Plus there is a very high standard of safe behavior by the systems. And we are working with at least some systems (I'm thinking the battery cells especially) whose states and capacities are not 100% predictable.

I do believe that the majority of problems are a combination of underlying hardware faults that are not properly handled by the software. I think there are two points here. One is, some of the problems will not be fixed by software updates, which are not magic pills. Two is, software fixes CAN correct some of the problems, not necessarily as covering up symptoms but rather better handling scenarios that the software designers had not previously properly accounted for.

i have to say, the apparent fragility of the update process itself is a little offputting, and I agree that implies the likelihood of significant OTA updates on these cars seems nil.

I would say, if a dealer says, "that will be fixed by a software update," that statement is more hope than fact, but that doesn't mean it's not true.

Welcome to the Taycan world!

Same historical story bandaided with a monster software patch a couple of years back - fixed mainy things but not all.

OTA will prevail for simple things such as calendar, NAV, address book, legal statements etc but significant upgrades most likely not as the risk of failure is high.

 

[Pepppie]

And? Has anyone received the update this week or heard from their dealer that the update is available? Or perhaps found a technical document about this update?

I am very curious to see what is coming!

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