To respond to the OP, we are waiting until late next year (car must be scheduled in Sept. for turn-in in Dec.) and doing the buyback on our 2013 Passat SEL Premium. We bought it new in July '13, and will have about 80K on it by the time we turn it in. So that's 5/12 years of driving, and if we kept it we would be looking at some significant maintenance costs. Plus, even with the extended warranties on turbo, AdBlue heater, and heater core, I can't be sanguine about owning this car in the long term given all the fragile and expensive emissions gear it's got. The final point is that VW is going to pay us about $2K less than we gave for the car new. Given these facts, I can't seriously consider the fix.