Should my Audi A4 Allroad have the emissions fix?

I have just received a recall for my Audi A4 Allroad to have the NOx fix. The letter clearly states that following the modification there will be "no negative impact on engine performance, maximum torque, fuel consumption, noise and CO2 emissions". This statement is at odds with your recent comment that owners, having had the modifications carried out, are finding "a decrease in drivability, with the usable torque coming in at 300rpm higher than before".

Asked on 25 January 2017 by Alasdair Morrison

Answered by Honest John
The statement from Audi amounts to a guarantee, but it is not the experience of a lot of readers with this engine. So have the work done and if it affects the car, take it back to the dealer, demand that he fixes it and demand that he keeps you mobile in an equivalent car until he has. If he refuses, sue him for the value of your car.
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