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Diesel Cayenne and VW emission issue


Old 05-18-2018, 08:26 AM
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I checked into a new TCU unit. Cost is 600 bucks from Porsche and appears to be the same unit for all motor cayennes in 15/16. My thought is that it would have the "old" software loaded and could help the shifting. However, without knowing exactly what was changed between the ECU/TCU I am not sure it would help (plus may have to be coded by Porsche which may automatically upload new software). Any thoughts from those that might know a bit more about how the system works?
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Old 05-18-2018, 02:50 PM
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Can't imagine they'd sell a TCU without the legally mandated software loaded now, after the settlement.

But if so, you're probably right that to make it work on your vehicle, they'd have to code it which would trigger the software update.
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Old 05-18-2018, 04:15 PM
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^^^ looks like they are sold new without any coding (since it is used with different engines).

Just have to scavenger used parts stores and see if you can find one taken from a pre-fix Cayenne, Touareg or Q7. Then never let a dealer touch it
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Old Yesterday, 04:33 PM
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Originally Posted by visitador
From what I have been reading here, there is also a need to tune the software for the transmission, something that I remember no tuner is doing anything about it
I think VW/Porsche lowered boost at lower RPM which is why it contributes to a bigger lag. We will know if Blue Spark solves 95% of drivability issues..
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