We have a 61 plate Touran 1.6.
Had the fix done in April, and saw no difference in performance or fuel economy.
HOWEVER, you can hear the fan working more to keep the engine cool and in the last 4 weeks it has gone in to limp mode 3 times.
The official stance from VW is that they warranty ALL components of the emission system for 2 years from the date of the software fix (and of course any thing that does fail will have another 2 years warranty if repaired by VW) in their words ‘everything from the injectors to the sensors in the exhaust’.
It’s currently booked in to go on their diagnostics machine, and if it’s a fault to do with the emission update, then they’ll cover the cost of the check (£140) and of course do the work FOC.
I asked them how they would know if the EGR valve failure was caused by the fix or just died of natural causes, their response was: as long as there is no obvious external damage to the valve then they class it as warranty.
I know it’s the EGR valve because the first time it went in to limp mode I had it checked by a local garage for £28, unfortunately they wiped the fault codes from the memory so I had to wait for it to go again.
Their service manager told me to not drive the car unless I have break down cover!
MY ADVICE IS DO NOT GET THE UPDATE DONE
I noticed I’ve gone off of the original question, we are getting the car past it’s next MOT and then selling it, because we no longer have faith in the car.
So I definitely wouldn’t buy one that’s had the update done.