Not a fan of my phase 2. Got it done at 60k miles. Had tons of issues where my dpf sensors melted, changed hpfp, fuel filter, diesel tank cleaned, wire harness changed, and other electrical issues at 70k miles.
80k miles I had my adblue tank replaced because it was throwing codes.
82k miles I started losing coolant. Heat stopped working. Heater core was shot. Had heater core replaced along with some hoses. Some engine coolant sensor started giving issues and was replaced. Coolant leak still not stopping. Took car to dealer every week for 6 weeks. Coolant leak never stopped and heat still hasn't worked even after heater core replacement.
86k miles now and took car back for 7th visit. EGR Cooler getting replaced, along with EGR temperature sensor, and heater core again. VWoA wants me to change thermostat, even though no codes are being thrown from it. They said that's the only way they can guarantee my coolant to stop leaking and heat to work again.
Car has been at dealer for 2 weeks + now and no idea what is going on because the communication is horrible. I love the way this car drives and the mpg's I get, but my car is a damn lemon that I'm stuck with. I wish they would just buy it back and crush the dang thing.
So far this year my car has been at the dealer for about 2.5-3 months because of emission issues. I squarely put the blame on phase 2. The first owner put 34.5k miles on the car, and car fax had no issues. I drove it up to 60k miles with no issues, but decided to get phase 2 done at that time. It still drove another 10k miles fine, but I think phase 2 at that point had taken it's toll and started having problems.
So many heater cores on 2015's are going bad, and there isn't even a recall on them. They aren't even covered under the emission warranty either. I bought this car because our 2010 had 0 mechanical issues before we sold it back at 150k miles, so I figured this was an no brainier with the awesome emission warranty. Heater core ended up costing me $900 and now they want me to change the thermostat and some plastic piece for $935. So many regrets buying this car.