J1.1 Taycan High Voltage Battery Reliability Survey

[D00notD00d]

Please vote accurately, not speculatively!

If you bought your car used and haven’t verified from its PCSS record whether its had any battery modules replaced, you’re a ‘don’t know’.

You’re also a ‘don’t know’ if you’ve sold a car and don’t know if it has had any battery modules replaced since you sold it.

Votes can be changed.

Please check whether your vote is accurate according to the rules above and if necessary change it.

• Currently zero members have said they don't know if their car has had a HVB module replaced.
• Currently 142 members have recorded that none of the High Voltage Battery Modules on their car have been replaced.
• 41 of the 142 joined the forum since March 24, after j1.1 production ceased. That probably means they bought a used Taycan. Unless they have seen the car's records, or bought almost new, it probably means that they are 'don't knows'.

Thanks
D

Edit 19/10/25
Currently only 4 of 210 voters have said they don’t know their car’s full history. Given the number of voters who joined the forum after j1.1 production ceased, that doesn‘t seem credible.
I‘ve set the poll to close after 7 days.

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[Leccy61]

"WRS11 Checking high-voltage battery and replacing cell block module if necessary" was on the record for my car before I bought it. I assumed it didn't mean cell block module(s) were replaced as there is no additional item on the record for the repair, but it's got me thinking now.

 

[snstevens]

Please check whether your vote is accurate according to the rules above and if necessary change it.

• Currently zero members have said they don't know if their car has had a HVB module replaced.
• Currently 142 members have recorded that none of the High Voltage Battery Modules on their car have been replaced.
• 41 of the 142 joined the forum since March 24, after j1.1 production ceased. That probably means they bought a used Taycan. Unless they have seen the car's records, or bought almost new, it probably means that they are 'don't knows'.

Thanks
D

I applaud your goal of a more accurate survey, and at the same time I suspect the final outcome will not significantly change.

There has always been a large gap between the number of actual occurrences of true battery module failure/replacement, and the "no issues here" experience of most owners. This is what I have suspected all along, and your poll (at least to-date) confirms that suspicion.

Of course if the data changes that would be of interest to me, so "Thanks Again!" for doing this.

 

[Sace]

"WRS11 Checking high-voltage battery and replacing cell block module if necessary" was on the record for my car before I bought it. I assumed it didn't mean cell block module(s) were replaced as there is no additional item on the record for the repair, but it's got me thinking now.

Depends on the outcome of the check - Mine had that check as well but no modules replaced.

 

[D00notD00d]

There has always been a large gap between the number of actual occurrences of true battery module failure/replacement, and the "no issues here" experience of most owners. This is what I have suspected all along, and your poll (at least to-date) confirms that suspicion.

Your suspicion could be right, but you’ve not mentioned any evidential basis for it. Confirmation bias?

Unfortunately the results of this poll are likely based on unreliable answers, and so confirm nothing. I should have been more careful with the question wording.

Based upon the date they joined this forum, I suspect that somewhere around 25-33% of those who have said here that their car has never had a battery module replaced, have based their vote only on their period of ownership, rather than on full and certain knowledge of the car’s history. If that’s the case they should have voted ‘don’t know, car history unknown’. I should have been more careful with the question wording.

Currently only Porsche has the evidence to support whether the ‘2% affected’ figure they supplied to NTHSA is accurate. We’re not yet far enough into the battery service life, time will tell.

 

[D00notD00d]

I’m former J1.1 owner, no cells replaced.

otoh, i’m wondering if failedcharging unit might be the reason for cells failures as well?
Especially on ultra fast carging (250kw+)?

No

 

[D00notD00d]

"WRS11 Checking high-voltage battery and replacing cell block module if necessary" was on the record for my car before I bought it. I assumed it didn't mean cell block module(s) were replaced as there is no additional item on the record for the repair, but it's got me thinking now.

@Leccy61
Based on my car, replacement is recorded like this:

 

[Leccy61]

Thanks for that @D00notD00d very helpful, keeps my answer as it was

 

[feye]

Twice a module replaced, then on the third module failure a whole new pack. Nothing since. I guess the early batteries are indeed no good...

 

[feye]

I did on my first taycan. 12 cell modules were replaced at a cost of 43k (Porsche Cost) then 8 months later it failed again with another couple modules going bad. Ended up replacing the entire pack. I’ve said it before but these module replacements are bandaids, the other ones will eventually fail.

Exactly my experience! Everytime the car was in the shop for months.

When I now see how Porsche tries to go back to ICE, I basically lost interest in the brand!

Fact is: if you cannot deliver modern, engaging, high tech, fast charging, large range, fully electric cars, you have no chance on the global car market.

 

[Fish Fingers]

Currently only Porsche has the evidence to support whether the ‘2% affected’ figure they supplied to NTHSA is accurate.

Currently 16.4% on your survey here with 201 votes cast.

 

[JackSparrow]

It would be interesting to break out battery module failure rate by model year.
There were issues with much of 2020 battery production so we may see that in the data.

 

[D00notD00d]

It would be interesting to break out battery module failure rate by model year.
There were issues with much of 2020 battery production so we may see that in the data.

According to Porsche the issue may affect all j.1.1 cars, 2020-2024.

 

[D00notD00d]

Unfortunately the results of this poll are likely based on unreliable answers, and so confirm nothing. I should have been more careful with the question wording.

Based upon the date they joined this forum, I suspect that somewhere around 25-33% of those who have said here that their car has never had a battery module replaced, have based their vote only on their period of ownership, rather than on full and certain knowledge of the car’s history. If that’s the case they should have voted ‘don’t know, car history unknown’. I should have been more careful with the question wording.

Currently only Porsche has the evidence to support whether the ‘2% affected’ figure they supplied to NTHSA is accurate. We’re not yet far enough into the battery service life, time will tell.

Currently only 4 of 210 voters have said they don’t know their car’s full history. Given the number of voters who joined after j1.1 production ceased in March that seems unlikely.

 

[D00notD00d]

Twice a module replaced, then on the third module failure a whole new pack. Nothing since. I guess the early batteries are indeed no good...

What were the 3 replacement dates?
Porsche has said the problem may affect some of the entire j1.1 production run

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