High Voltage Battery Recall EXPANDED - ARB6 & ARB7

[BigBob]

Do we know his email address?

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[DerekS]

What is killing me is the ambiguity around this whole situation.

I “might” have a battery problem capable of causing a fire, but there’s no way for me to know.
They plan on providing “updated battery management software” but there’s no timeline and no way for me to know if I’ve already gotten it via that last OTA update, or if it was something else.

After the OTA update and a 99% charge, I got a yellow battery error suggesting service was necessary, which went away without any other effects. Based on the overall buggy nature of the car I have no way to know if this was a real fault, something the “new” software detected, or just a fluke.

The recall site continues to show the ARB7 campaign, which is ambiguously worded.

Is my car safe to charge and use or not, Porsche?? How long is it going to be in limbo like this??

I’m almost ready to give up. I actually started looking at Targas again, but I’m horrified at the prices (over 200K!) My 2014 Targa 4S, which I purchased in 2015 with 10K miles on it, was 115K.

 

[BigBob]

Think I’m going to go back to AM for next car. At least it will be more reliable and people let you out at junctions.

 

[Spyerx]

Here's what I think: I think porsche posted those notices to appease the regulators, they know there is no real fix out there, other than buying all the cars back or replacing the batteries. Which is what they will do. So they are spending their efforts on the battery replacement process.

At some point you have to cut losses, the labor to continually pay the dealers to inspect, loss of customer goodwill, etc, is not worth it.

 

[TaYcanAficionado]

Thanks for all the useful information guys. I have ordered a August 2021 CPO 4S in Germany, delivery expected to take place in around 10 days. Solid black, bordeaux interior, 30k miles on the clock, all the bells and whistles but the burmester plus 2 years approved warranty, valid after expiry of the current approved (ending August 2025). So vehicle is under approved warranty until August 2027.
I have written confirmation by the Porsche dealership/seller that all recalls have been completed and that no battery modules replaced so far. Latest recall completed being "WRS1" (done around a month ago) which didn't show any abnormalities. Dealership told me that car is listed as "ARB6" but they can't do anything for now as a "new software" is being expected in around 6 months. That's the information they received from Porsche headquarters in Germany at least.
Dealer told me on the phone that I shouldn't worry and there is no open recall on the vehicle as of now forcing the owner to charge to 80% or anything else. I may charge and drive the car without any restriction.
But reading all these things on the forum regarding the ARB6/ARB7 I am certainly worried that I may have misunderstood that point.

Therefore, my question: since all "doable" recalls have been completed as of right now (March 27, 2025), as per written confirmation by the Porsche dealership, including the "WRS1" and the "WRW1" (whatever that is), but the vehicle is still under "ARB6" waiting for new software, do I really need to be worried about anything? do I still have to limit charging to 80% or not park close to buildings etc?

By the way, the Porsche seller provided a battery test certificate showing rest capacity at 91%.

Any answer is highly appreciated.

 

[D00notD00d]

@DerekS - Does ARB7 in the USA come with any charging constraints and regular inspection requirement? Can you charge anywhere other than in a field?

 

[BigBob]

Thanks for all the useful information guys. I have ordered a August 2021 CPO 4S in Germany, delivery expected to take place in around 10 days. Solid black, bordeaux interior, 30k miles on the clock, all the bells and whistles but the burmester plus 2 years approved warranty, valid after expiry of the current approved (ending August 2025). So vehicle is under approved warranty until August 2027.
I have written confirmation by the Porsche dealership/seller that all recalls have been completed and that no battery modules replaced so far. Latest recall completed being "WRS1" (done around a month ago) which didn't show any abnormalities. Dealership told me that car is listed as "ARB6" but they can't do anything for now as a "new software" is being expected in around 6 months. That's the information they received from Porsche headquarters in Germany at least.
Dealer told me on the phone that I shouldn't worry and there is no open recall on the vehicle as of now forcing the owner to charge to 80% or anything else. I may charge and drive the car without any restriction.
But reading all these things on the forum regarding the ARB6/ARB7 I am certainly worried that I may have misunderstood that point.

Therefore, my question: since all "doable" recalls have been completed as of right now (March 27, 2025), as per written confirmation by the Porsche dealership, including the "WRS1" and the "WRW1" (whatever that is), but the vehicle is still under "ARB6" waiting for new software, do I really need to be worried about anything? do I still have to limit charging to 80% or not park close to buildings etc?

By the way, the Porsche seller provided a battery test certificate showing rest capacity at 91%.

Any answer is highly appreciated.

I wouldn’t buy one with that recall hanging over it. I think you are supposed to limit to 80% as you have the 6 monthly (or do you mean 60’days) inspection, but even if not that could change the day after you receive it.

Over here, they aren’t offering courtesy cars for anything including this campaign and service booking queues are massive (3-4 months). Ask for some guarantees about courtesy cars etc, but better off buying an ICE car imho. Not a Porsche either given the service levels.

 

[D00notD00d]

@TaYcanAficionado - do Porsche Germany or the German/EU vehicle safety regulator impose any charging constraints? Ask them.
Currently a Porsche dealer in the UK will sell you a car under a ARB6 recall - and a charger to go with it - but unless you have a field with a 32a supply, you can’t charge at home. And you can’t charge it above 80%. In the UK, home charging is one tenth the cost of public charging.
See my post #316 above.
i wouldn’t buy it it until a full battery replacement is done.

 

[chun]

@TaYcanAficionado - do Porsche Germany or the German/EU vehicle safety regulator impose any charging constraints? Ask them.
Currently a Porsche dealer in the UK will sell you a car under a ARB6 recall - and a charger to go with it - but unless you have a field with a 32a supply, you can’t charge at home. And you can’t charge it above 80%.
See my post #316 above.
i wouldn’t buy it it until a full battery replacement is done.

Those kind of constraints are illegal in EU and USA.

UK, Swiss and other countries with less regulations do get those constraints sadly

 

[Scandinavian]

Those kind of constraints are illegal in EU and USA.

UK, Swiss and other countries with less regulations do get those constraints sadly

what constraints are you referring to?

 

[TaYcanAficionado]

thanks for your answers guys. What I don't understand is this differentiation between ARB6 and ARB7. My understanding is that ARB7s do not have to limit their charge to 80% nor visit the shop every 60 days, since their car is monitored remotely. But ARB6s don't have that luxury.

My "dumb" question: don't all taycans have remote functions installed from factory? is there an option available that allows the car to communicate online and somone might not have optioned it upon car purchase? because I can't find any such option in the porsche configurator. If the answer is that all taycans are remote-access capable, then the next question is, why do they differentiate between ARB6 and ARB7? and also, if this is just about switching on something in the car screen, why don't they tell owners to enable it and therefore move everyone from ARB6 to ARB7?

That would definitely save people sitting on ARB6 trouble, as it seems.

 

[BigBob]

My communication module was broken (4 months before they could look at it) when all the nonsense started. So no data being sent to Porsche so I ended up on the 60 day version. I imagine, once you’re on the list you stay on it.
Maybe you have to be subscribed to connect (I am) as well, or maybe it doesn’t work if you park in a poor cell phone reception area? Or maybe they’re just f’kin clueless.

 

[gtm]

@DerekS - Does ARB7 in the USA come with any charging constraints and regular inspection requirement? Can you charge anywhere other than in a field?

So I'm not DerekS but I can answer your question. Short answer is there are no restrictions under either ARB6 or ARB7.

I received a recall letter from Porsche stating I was under ARB7 and in theory being monitored OTA. Got to the dealer for some work unrelated to the battery and their system had me under ARB6 (which was odd since I had all data sharing enabled). They performed WRS1 - the workshop campaign associated with ARB6 and had Porsche look at the car OTA and generate a VAL. I think the US WRS1 is equivalent to your WRS0. They claim this took less than an hour. My battery passed whatever data analysis they did. There was no software update available so ARB6 was not completed. There was no restriction on charging level or where to charge. I was told periodic testing was not necessary (your 60 day requirement). The varying recall procedures and testing from market to market seems to be just dealing with the regulators.

Edit: I was wrong on ARB6. A charge limit of 80% is recommended. However after WRS1 was completed my dealer assured me that there was no charging limit. So limit your charging until Porsche has a chance to check and then assume you battery will be just fine from there on out? Or is the dealer just as confused as everyone else?

 

[TaYcanAficionado]

that would be a reasonable explanation. But then again, the number of people getting ARB6 instead of ARB7 letters is so high, that I highly doubt everyone has broken communication modules or just bad reception...
And even in that case, can Porsche confirm that they'll move you to ARB7 (and thus not keep you bound to the 80% charging limit or avoid parking inside obligation/recommendation) if such communication problem is solved?

 

[Tooney]

@DerekS - Does ARB7 in the USA come with any charging constraints and regular inspection requirement? Can you charge anywhere other than in a field?

In the US, ARB7 VINs (Porsche can monitor battery condition OTA) have no charging constraints and inspection requirements.
In the US, ARB6 VINs (Porsche cannot monitor battery condition OTA) are advised not to charge more than 80% and to have the battery checked by the dealer.
No advice to US owners regarding where charging or parking should be done.
See extracts and links to documents about ARB6/ARB7 in US in this forum post: https://www.taycanforum.com/forum/t...ic-software-october-1-2024.21536/#post-329562

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