New Battery monitoring software update?

[Sly_North]

Odd given that it was installed at my 2 year service last week.

No. I got the same temporary software at my service. It's partial: it does check the battery, but cannot send the result OTA. The car still has to come to a dealer every 60 days.
The fall software update will allow remote battery checking.

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[BigBob]

No. I got the same temporary software at my service. It's partial: it does check the battery, but cannot send the result OTA. The car still has to come to a dealer every 60 days.
The fall software update will allow remote battery checking.

Do you know how long the 60 day check takes? Mine has been in once already, but with a load of other work at same time. I think I read 3 hours on one thread and 3 days on another!!
Ta.

 

[eddieterry]

@eddieterry - does the first page of your letter show the recall ID is ARB6 or ARB7? As your letter doesn’t seem to mention any charging location restrictions my guess is you have ARB7.

Higher up you can see the first page of the letter which shows it is ARB6. Location restrictions have now been dropped (Porsche would have had problems if they had not !).

 

[W1NGE]

No. I got the same temporary software at my service. It's partial: it does check the battery, but cannot send the result OTA. The car still has to come to a dealer every 60 days.
The fall software update will allow remote battery checking.

I received no such instruction from my dealership after the service.

The software applied matches the campaign number documented in the letter specifically for battery monitoring received some months back.

There continues to be so much confusion on this topic.

Time will tell but I have no plans to be back at my dealership within the next 2 years (I hope).

 

[chun]

I received no such instruction from my dealership after the service.

The software applied matches the campaign number documented in the letter specifically for battery monitoring received some months back.

There continues to be so much confusion on this topic.

Time will tell but I have no plans to be back at my dealership within the next 2 years (I hope).

More than likely your dealer got confused.

The software is 100% not ready, my dealer confirmed it with porsche germany mothership live in front of me when i went to change to summer wheels. And right after that they started sending the letters that it got delayed to Q2.

What they did is they updated what logs are created by the the battery ECU - they enabled dev/service mode basically on the ECU, to then be read by PIWIS when you take the car at the dealer - every 60 days according to the letter.

But practically, my dealer told me to not bother, because they will do nothing even if I take it every 60 days. They don't have the time or resrouces to check so many cars every 60 days, it will mean tens of taycans rolling in every day.

WRW1 likely changed how they handle files/data - unknown/unclear to dealers also. And now we need to wait until Q2 for the software that does the sending to be deployed.

 

[BigBob]

More than likely your dealer got confused.

The software is 100% not ready, my dealer confirmed it with porsche germany mothership live in front of me when i went to change to summer wheels. And right after that they started sending the letters that it got delayed to Q2.

What they did is they updated what logs are created by the the battery ECU - they enabled dev/service mode basically on the ECU, to then be read by PIWIS when you take the car at the dealer - every 60 days according to the letter.

But practically, my dealer told me to not bother, because they will do nothing even if I take it every 60 days. They don't have the time or resrouces to check so many cars every 60 days, it will mean tens of taycans rolling in every day.

WRW1 likely changed how they handle files/data - unknown/unclear to dealers also. And now we need to wait until Q2 for the software that does the sending to be deployed.

Good info. Thanks

They did actually give me a copy of the battery health results by cell (after multiple requests) so on my massive data set of 1, they do sometimes do something!!

 

[Scandinavian]

More than likely your dealer got confused.

The software is 100% not ready, my dealer confirmed it with porsche germany mothership live in front of me when i went to change to summer wheels. And right after that they started sending the letters that it got delayed to Q2.

What they did is they updated what logs are created by the the battery ECU - they enabled dev/service mode basically on the ECU, to then be read by PIWIS when you take the car at the dealer - every 60 days according to the letter.

But practically, my dealer told me to not bother, because they will do nothing even if I take it every 60 days. They don't have the time or resrouces to check so many cars every 60 days, it will mean tens of taycans rolling in every day.

WRW1 likely changed how they handle files/data - unknown/unclear to dealers also. And now we need to wait until Q2 for the software that does the sending to be deployed.

This is exactly the same message I got from my service guys. They did not want me to bring in the car every 60 days since they could not handle it. They have plenty on their hands anyway. The delay to book a service has gone from 3-4 weeks to 3 months at the moment. That is the effect of having so few technicians available for their EV’s

 

[Sly_North]

Do you know how long the 60 day check takes? Mine has been in once already, but with a load of other work at same time. I think I read 3 hours on one thread and 3 days on another!!
Ta.

The letter I received a few days ago from Porsche (and not from a confused dealer ) for the 2nd check, 60 days from my last service, says 3 hours.
It also says (like Tooney mentioned) that the final software will be available in the second half of this year.

+1 to everything chun said just above.

I'm actually puzzled why it takes so much time from Porsche to develop and deploy this update. Maybe there's an in-car resource limitation, and the unrelated WRW1 (communication optimization) is to free some space (memory or disk?) to save or buffer the logs before sending them OTA? No way to know for sure unfortunately.

 

[tophamn]

I'm actually puzzled why it takes so much time from Porsche to develop and deploy this update...

I don't know for sure so I'm only guessing but I suspect Porsche is having to work closely with LG to remotely identify battery cells which are failing. In order to do this they will need to test with both good and bad batteries to try and identify characteristics leading to failures and this takes time - what should monitoring software look for which would point to a battery starting to fail?

What both Porsche and LG will want to avoid is too many false positives (batteries showing as bad which aren't really = unnecessary cost) but also avoid missing bad batteries (which could fail, catch fire, etc. = bad publicity and huge unnecessary cost). While they work this out Porsche have given recommendations to owners to reduce the risk and therefore their exposure to potential legal action.

 

[D00notD00d]

Higher up you can see the first page of the letter which shows it is ARB6. Location restrictions have now been dropped (Porsche would have had problems if they had not !).

Your ARB6 letter was issued 26/3/25. Mine issued 15/3/25 said

Although I’ve rejected this, they’ve not yet retracted it.

 

[D00notD00d]

Note there’s some duplication between this thread and:

https://www.taycanforum.com/forum/threads/arb6-recall-notice-uk.22854/

https://www.taycanforum.com/taycan-high-voltage-battery-recall-expanded-arb6-arb7/

Use one of those going forward ?

 

[W1NGE]

More than likely your dealer got confused.

The software is 100% not ready, my dealer confirmed it with porsche germany mothership live in front of me when i went to change to summer wheels. And right after that they started sending the letters that it got delayed to Q2.

What they did is they updated what logs are created by the the battery ECU - they enabled dev/service mode basically on the ECU, to then be read by PIWIS when you take the car at the dealer - every 60 days according to the letter.

But practically, my dealer told me to not bother, because they will do nothing even if I take it every 60 days. They don't have the time or resrouces to check so many cars every 60 days, it will mean tens of taycans rolling in every day.

WRW1 likely changed how they handle files/data - unknown/unclear to dealers also. And now we need to wait until Q2 for the software that does the sending to be deployed.

WRS0 was applied - i have it in black.amd white together with a description of the work whicb specifically states BMS.

I also had the comms WRS1 update via OTA prior.

Pretty sure that my dealer is on top of this also and inevitably knows more on this topic than folk on this forum.

 

[f1eng]

WRS0 was applied - i have it in black.amd white together with a description of the work whicb specifically states BMS.

I also had the comms WRS1 update via OTA prior.

Pretty sure that my dealer is on top of this also and inevitably knows more on this topic than folk on this forum.

That is what I had done in January though my WRS0 was said to be preparation for battery monitoring

 

[Tooney]

WRS0 was applied - i have it in black.amd white together with a description of the work whicb specifically states BMS.

I believe what you have written on your shop document is the title of WRS0 campaign: "Check on HVB cell modules and reprogramming of BMCe software".
I doubt the installation of HV battery monitoring software actually occurred.
From what I have read elsewhere, the only installations of the battery monitoring software now are for owners who are paid to be part of a beta test.

 

[chun]

I don't know for sure so I'm only guessing but I suspect Porsche is having to work closely with LG to remotely identify battery cells which are failing. In order to do this they will need to test with both good and bad batteries to try and identify characteristics leading to failures and this takes time - what should monitoring software look for which would point to a battery starting to fail?

What both Porsche and LG will want to avoid is too many false positives (batteries showing as bad which aren't really = unnecessary cost) but also avoid missing bad batteries (which could fail, catch fire, etc. = bad publicity and huge unnecessary cost). While they work this out Porsche have given recommendations to owners to reduce the risk and therefore their exposure to potential legal action.

Just want to mention that Jaguar, using the same batteries, with same issues, have already released the software quite a while ago. Nevertheless, even after that software, i think they decided to buy back all the cars. Maybe someone has more clear info on that last point.

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