Comment This is all about warranty.. (Score 1) 143
The way I figure it, VW did their longevity and warranty cost calculations, set the horsepower and price, and then someone came back from R&D to say "We've got a couple extra settings you can tweak! You get extra horsepower and it's only a little more expensive in warranty costs!"
So they sell it as an add-on. Sure, the change is only software, but it's not too much different than they were already doing with things like APR tunes. Get your stage 2 kit installed by an independent or DIY? No warranty. Have the dealer do it? Full warranty, minus the performance parts themselves. Some dealers, if you bought the kit from them, would even self-warranty the bits excluded.
Granted, the whole "Sell the car and it goes away" thing is naff and needs to be changed, but.