Low mileage, 2025 GTS CPO with a few red flags, need advice

[SoccerMan94043]

I cross posted this in Reddit, so apologies for any duplication.

I'm currently considering a very low mileage (500 miles) 2025 GTS CPO and while researching it, has turned up two potential red flags. I thought the community here might have some advise based on experience.

The CPO report uncovered these potential red flags:
1) Tires tread depth is 5mm (the tires are Pirelli P Zero Rs... there isn't a ton of information online yet for these, but it looks like they come new with about 8mm).
2) Brakes (standard brakes) are 8mm front and 9mm back
3) Brake discs are 0.25, 0.26, 0.19, 0.17

For 500 miles, that seems like a massive amount of wear (50% on the tires and 25% on the brakes) and makes me assume it's lived on a track for some of that (the previous owner is apparently someone who buys 3 to 5 Porsches a year). I've asked for a PIWIS report which they promised to run today so I can see some of the potential battery impact (I've now received a 180 page report but it looks like just a firmware dump to me... I'll have ChatGPT analyze that for me later today) .

Should I have concerns if it did live on the track for some of it's 500 miles? What impact might that have on the battery, suspension, future rattles and squeaks, etc?

It's possible I don't know the new tread depth of the Pirelli P Zero Rs (best I could find was 8mm)... anyone have good information on that?

Thank you!

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[SergeyIndy]

1) These are the most aggressive tires and intended for track. I am seeing new 6mm so if they are reading 5mm that is about right. This is not the kind of tire to use for daily driving.
2) Brake pad measurements do not matter. Brake pads are rarely used and you cannot wear them out before you need to replace them for age at a 6 year mark.
3) Brake discs are lifetime, so will never need to touch them, unless they warp for some reason.

180 page report is total non-sense. What you need to ask them is the following that can be done on your own using OBD scanner and CarScanner app. You can send me the 180 page report and I can see if I can interpret it for you.

1) SoH (State of Health) of HV battery with expectation of 95% to be the worst case
2) Individual Cells: SoC, Voltage, and Temperature.

If you can get the above, we can interpret them for you.

I do not see the above as red flags at all as long as you can get SoH of the battery and Cells stats.

 

[SoccerMan94043]

I had ChatGPT analyze the PIWIS report and this is what it found... interesting... does this change anyone's opinion?

BOTTOM LINE — My Assessment
What Looks Good

• No crash events stored
• All airbag ignition circuits test healthy
• Battery and inverters are clean
• No drive-unit or high-voltage errors
• No thermal management warnings
• No launch-control history

What Looks Concerning

These strongly suggest post-sale work or repair:
1. Airbag fault B184C00 logged
2. Vehicle Diagnostics Protection activated → Someone locked modules
3. ADAS systems wiped/reset
4. ZFAS module replaced/reset
5. Camera calibration incomplete
6. ParkAssist sensors show abnormal values
7. Very high operating hours for the miles







1. Airbag System Fault Logged

• Fault B184C00 – Vehicle Diagnostics Protection Active was stored on 11/07/2025 at 888 km.
• This fault does not appear on a brand-new, unmodified Taycan.
• The system shows it was triggered after a module was locked or replaced.

Why this matters:
This suggests airbag module work, voltage interruption, or previous repair.


2. Diagnostics Protection Was Activated

The PIWIS log shows the vehicle has diagnostic protection enabled, which disables full visibility into several systems.


Why this matters:
This is typically only seen after:

• Control-unit replacement
• Coding changes
• Security-related reprogramming
  This is not normal for a 500-mile car.

3. ADAS (Driver Assistance) Systems Show Re-Initialization

Many advanced safety systems—including lane assist, emergency assist, night vision, intersection assist—are all showing:

“Nominal status: Initialization”

This should not occur after 51 operating hours unless:

• Cameras or radars were replaced
• Windshield was replaced
• ADAS modules were reset following body repair

4. ZFAS Control Unit Shows Impossible Future Timestamps

The central ADAS brain (ZFAS) shows timestamps such as 2070, 2077, 2064, which only appear after:

• A module swap
• A full reset
• Replacement with a unit that has not been properly coded

5. ParkAssist Sensors Show Abnormal Values

Several sensors report 65535 cm, which is the diagnostic maximum and indicates non-responding or disconnected sensors.
This occurs after bumper removal, sensor replacement, or impact repair.


6. Camera Calibration Incomplete

Front camera online calibration is only 42% complete, even at 843 km.
Factory calibrations normally finish very early in the car’s life.


Incomplete calibration = evidence of camera or windshield replacement.


7. High Operating Hours for Miles

• Mileage: 888 km
• Operating hours: 51 h

This equals 10.8 miles per hour, extremely low average speed.


This pattern is typical of:

• Long periods of idling or diagnostic operation
• Extended workshop time
• Calibration cycles after repair
• Transport/lot time with system powered on

8. No Record of Airbag Deployment or Major Crash

Airbag circuits and crash counters all show zero deployments, which is good.


However, the faults and module behaviors strongly indicate some level of repair work, most likely to the front bumper area, sensors, or windshield.

 

[SoccerMan94043]

1) These are the most aggressive tires and intended for track. I am seeing new 6mm so if they are reading 5mm that is about right. This is not the kind of tire to use for daily driving.
2) Brake pad measurements do not matter. Brake pads are rarely used and you cannot wear them out before you need to replace them for age at a 6 year mark.
3) Brake discs are lifetime, so will never need to touch them, unless they warp for some reason.

180 page report is total non-sense. What you need to ask them is the following that can be done on your own using OBD scanner and CarScanner app. You can send me the 180 page report and I can see if I can interpret it for you.

1) SoH (State of Health) of HV battery with expectation of 95% to be the worst case
2) Individual Cells: SoC, Voltage, and Temperature.

If you can get the above, we can interpret them for you.

I do not see the above as red flags at all as long as you can get SoH of the battery and Cells stats.

Thanks... I wonder what you think with the chatgpt diagnostic above.

Having driven Tesla's for 10 years and knowing how little brake pads get hit, a 25% reductionin 500 miles is a bit of a red flag.

I'll see about getting the battery checked... I'm a little less worried about that since I'd have it under warranty for ~5.5 years.

 

[trycan]

I'm surprised the launch counter is at zero. Might want to confirm ChatGPT was correct on that one.

 

[SoccerMan94043]

I'm surprised the launch counter is at zero. Might want to confirm ChatGPT was correct on that one.

yeah... good catch. I drove it Sunday, launched it once and this report was generated on Monday... I'm really not sure what to trust.

 

[W1NGE]

I cross posted this in Reddit, so apologies for any duplication.

I'm currently considering a very low mileage (500 miles) 2025 GTS CPO and while researching it, has turned up two potential red flags. I thought the community here might have some advise based on experience.

The CPO report uncovered these potential red flags:
1) Tires tread depth is 5mm (the tires are Pirelli P Zero Rs... there isn't a ton of information online yet for these, but it looks like they come new with about 8mm).
2) Brakes (standard brakes) are 8mm front and 9mm back
3) Brake discs are 0.25, 0.26, 0.19, 0.17

For 500 miles, that seems like a massive amount of wear (50% on the tires and 25% on the brakes) and makes me assume it's lived on a track for some of that (the previous owner is apparently someone who buys 3 to 5 Porsches a year). I've asked for a PIWIS report which they promised to run today so I can see some of the potential battery impact (I've now received a 180 page report but it looks like just a firmware dump to me... I'll have ChatGPT analyze that for me later today) .

Should I have concerns if it did live on the track for some of it's 500 miles? What impact might that have on the battery, suspension, future rattles and squeaks, etc?

It's possible I don't know the new tread depth of the Pirelli P Zero Rs (best I could find was 8mm)... anyone have good information on that?

Thank you!

P Zeros typically 8mm to 10mm - check Pirelli website.

Doubt they are Rs so please check.

Use a VIN checker to get the original spec of the car which should list the wheels / tyres.

Depending on the tyre exact model they could be fairly worn.

The car will come with a cast iron warranty so I wouldn't sweat the rest.

If all checks out you've likely got a bargain so either invest in new tyres (all) or better still bake it into the deal.

 

[SoccerMan94043]

P Zeros typically 8mm to 10mm - check Pirelli website.

Doubt they are Rs so please check.

Use a VIN checker to get the original spec of the car which should list the wheels / tyres.

Depending on the tyre exact model they could be fairly worn.

The car will come with a cast iron warranty so I wouldn't sweat the rest.

If all checks out you've likely got a bargain so either invest in new tyres (all) or better still bake it into the deal.

Tire's are Pirelli P Zero R's... I have photos and saw them in person Sunday. The car has the "Performance Summer Tires for 21" Wheels" upgrade. I'm trying to get tires worked into the deal.

The concern in the warranty is if they try to tell me I modified the system.

 

[SoccerMan94043]

yeah... good catch. I drove it Sunday, launched it once and this report was generated on Monday... I'm really not sure what to trust.

More info on this from ChatGPT:



The reason the PIWIS report you provided shows no launch-control history is likely due to one of the following factors related to this specific Taycan:

1. Launch Control Never Used
   The car may never have been driven in a way that triggers the Launch Control system. Since the report shows only 888 km and 51 operating hours, it’s consistent with very light, low-speed use. Launch Control counters only increment when the system is actively engaged.
2. Module Resets / Replacements
   Your PIWIS report shows diagnostic protection active, ADAS recalibration, and ZFAS module replacement. Some Porsche modules store launch-control data in volatile memory or in a control unit that may have been replaced or reset. This would erase any prior launch-control history.
3. Factory or Dealer Programming State
   Some Taycans leave the factory or dealership in a demo/low-use configuration, where counters for sport/launch features are not fully recorded until normal consumer usage begins.
4. Firmware / Version Differences
   Depending on the software version of the control units at the time of the scan, PIWIS may not report certain counters if they are stored in a different module or if the module is currently locked by diagnostics protection.

Given the combination of low mileage, module resets, and diagnostic locks, the absence of launch-control records is expected and does not indicate prior use in launch control, but it does make it impossible to confirm from the report whether the car had ever been used aggressively before the modules were reset.

 

[refazi]

I see you are from the Bay Area, Which dealer is this car at?

 

[SoccerMan94043]

I see you are from the Bay Area, Which dealer is this car at?

Arizona.

 

[SoccerMan94043]

Next update! The sales person sent me photos of the tread depth measures, including a new P Zero R tire on a new car as well as one new tire on my car. Turns out the Pirelli P Zero R they are sourcing have a tread depth of 6.5mm new. All tires are within ~1mm so not a red flag.

That being said, without that, I wouldn't have found the disparity in the PIWIS report. Still waiting on their response to all that.

 

[SoccerMan94043]

very disconcerting response from the sales person. I'm losing faith:

"
• Launch control counters: launch control has no impact on warranty. I know it has at least 3 because we did them.
• Over-torque events: the computer will not allow over torque events
• Powertrain abuse logs: non detected
• Drive mode usage logs: non detected
• Launch history / LC usage: non detected
• Torque limit exceedances: non detected the computer will not allow it

1. Body shop invoice history: non detected non available
2. Verification of warranty status (module changes can affect it). non detected non available
3. A full PIWIS “Campaign & Workshop History” printout: all listed on CarFax

"

 

[FlyingPoint]

Run like you are being chased by a grizzly bear - it and this car will likely eat you alive.

 

[SergeyIndy]

very disconcerting response from the sales person. I'm losing faith:

"
• Launch control counters: launch control has no impact on warranty. I know it has at least 3 because we did them.
• Over-torque events: the computer will not allow over torque events
• Powertrain abuse logs: non detected
• Drive mode usage logs: non detected
• Launch history / LC usage: non detected
• Torque limit exceedances: non detected the computer will not allow it


"

I am not following what is the issue here. Launch controls do not do any damage to the car as so many protection mechanisms are in place. Also, when sales telling you they did 3, they may not know what they are talking about as there are many pre-conditions, and the car should show you Launch Control message when you are in it, but you should have at least 1 because it is part of the delivery checklist procedure, and they cannot be erased. Also, they cannot CPO anything if it has any issues, since the logs have to be sent to Germany to receive CPO certification. I think this GPT thing is not good. Send me the report so I can look at it, as what you are sharing sounds like a total mess. Simple $45 OBD reader gives me everything I want to know about my car.

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