In fact it would not surprise me in the least to learn that there are VAG 3.0TDI cars in their possession with BS boxes and Malone tunes in them.

At Navistar we had all of them. Some of it was fascination to see “what they do”, some of it was to understand what the failures and tell-tales looked like, and (big piece) was to understand how to detect and block them in the future.... because the EPA and CARB do NOT like modifications that can impact emissions. I’m sure VAG is uber paranoid about all that.

Given the discussion above about performance problems after the fix, I thought it would be a good time to see where we are on the survey I started in April. There are now 66 responses with almost half (47%) being 2014 models, 23% each for 2013 and 2015, followed by 5 responses by 2016 owners. 74% have reported that the fix has been applied which is very consistent with the 73% in the last update.

Satisfaction has dropped regarding performance after the fix (not considering compensation). At my last update in April, 38% were either "sorry they did it" or experienced "noticeably negative" performance. This has risen to 44% negative after the fix with 2013 and 2014 owners at 48% "sorry they did it" or experienced "noticeably negative" performance.

When including compensation paid, dissatisfaction has also increased. Those that are "sorry they did it" or "somewhat negative" on the whole deal has risen from 21% to 26%. Finally, for those not yet fixed, 59% are "possible, but don't want to" or "maybe, I'll wait to see what develops". Personally, I'm edging more toward never doing the fix at this point.

As I mentioned in an earlier post, I discussed with the PCA SUV representative the possibility of giving this survey some exposure in the eBrake news. Once I sent him the Excel spreadsheet I had at the time I never heard from him again. One might conclude from this that PCA and by extension Porsche does not want anyone knowing how dissatisfied their customers are with the fix. If the survey results are representative of the population as a whole, 44% experiencing noticeably negative performance after the fix is a big number. I have attached the Excel spreadsheet that breaks out responses by model year for those that are interested.

Hi to all 3.0 TDi CD owners including Audi and Touareg's.
Hailing from BC Canada , I had our 2014 CD done mid January, right from the onslaught I new there was something totally wrong with the fix.
Upart from the audible change and slow speed stumbling on a slight accelerator input, what really worries me are the high EGT's I recorded.
I did this back in February and March, still in winter with a OBD2 Dongle I bought from Blue Driver up here in Canada, a nice bit of kit!
Of course these devices use a smartphone and a downloaded App.
What really upset me were the temps I was seeing at a mild acceleration, driving up an average incline for a mile or so, in my residential area.
No added weight or towing, just me and the vehicle's natural load, the temps were reaching 1200-1300F.
That's ridiculous when the outside temp was around 6-7C or 43-45F, what's going to happen in the middle of Summer especially if people tow?
I brought this to the attention of my Porsche Dealer, at which time they took it in for there own data logging.
This was passed on and Porsche Germany, they came back requesting them to investigate the EGR, which was replaced with a new version.
That's when my vehicles troubles started; after having my Cayenne in the service department for almost a month because of the poor support up here in Canada.
I finally got her back late April, everything seemed a little smoother although the same post fix noise and Transmission shifting issues were there. Although I thought I was hearing the Radiator Fan running continuously.
Driving her locally for a few days, I had to make a trip out of town to Kelowna BC, this involves a bit of mountain driving at which point the engine check light came on.
She's now been back at the Dealer for 3 weeks and they can't figure out why the fan is running continuously.
Again Porsche Canada has a poor service response to there dealerships which have to follow this ridiculous protocol.
My advice to any individual who hasn't had the fix, Don't it's not worth the money! and you can't blame these Awesome machines, it's not this fantastic 3.0 TDi's engine fault.
Good luck.

It's not about the previous numbers! But typically we're around 850-1000F under normal driving situations.
Of course this would increase slightly with higher ambient temperatures, if I was towing my trailer and boat especially up an incline.
One can control those temps by less Foot in the Game and using the manual side of the transmission, then gearing down, less load equates to lower temperatures.
As I mentioned what I was seeing is with one person, and back in February, March on a typical winters day here in Coastal Western Canada.
The problem is; the manipulation of the ERG valve after the fix and probably the Timing as well, which in unison are causing these higher temperatures.
Your local Porsche Dealer is going to be pretty tight lipped about the actual mods, which I guess is understandable.