VAG have really made a complete balls up with this emissions "fix" software update. Of course they are going to say there are no adverse impacts with mpg, power or anything else after applying the update. They lied about the emissions in the first place so why would you believe them now? Once a liar always a liar.
Have a read of this. There are literally hundreds of comments under the article from owners which tell the real truth about how the "fix" has now ruined their cars...
And it's not just the Europeans who are complaining left, right and centre. Our friends down under are also up in arms about the whole fiasco...
There is no legal requirement in the UK to have the emissions "fix" applied and the government aren't offering any incentives for doing so (or penalties for not doing so), so I'm not sure why anyone would get it done voluntarily unless it is purely for ecological and environmental reasons, but if that is the case then those people should really be looking at getting a hybrid car instead. All the risk of having the "fix" applied is with the customer and none of it is with VAG. Don't think that VAG are going to
help you out if you later find you need to replace your EGR valve or DPF filter due to premature failure because of the "fix" making those components work much harder than they used to.
I would even go as far to say that any cars which have
not had the emissions fix applied may actually turn out to be worth more than the cars that have due to all the post-fix issues that have come to light.
My car isn't broken so it's not getting "fixed" and I'll be doing everything in my power to make sure that no-one goes anywhere near my engine ECU with any software updates. My car goes in for a service next week and I have already drawn up an agreement for the dealer to sign stating that they will not apply any ECU software updates to my car. A template of that agreement is
HERE for anyone interested in case they decide to do the same. It is now just going to be a complete PITA because every time I need to get any work done on my car I'm going to have to go through this nonsense of having the dealer / VAG specialist sign one of these agreements.
Also, VAG aren't permitting dealers to roll back the software "fix", so once it's been applied there is no way back to the previous software version (at least not through any official channels). In this scenario your only option is to get the car remapped by an independent mapper who will be able to fix VAG's emissions "fix".