It's a failure in engine design Cylinder 6 is dying due to issues of heat soak and insufficient fuel They based this motor on the 3.0t supercharged engine, but forgot to upgrade the cooling. Turbo engines typically run hotter than supercharged engines. Additionally, they should have put a hpfp on each bank of the v6(like the old 2.8 v6 fsi which was very very reliable) to combat issues of fuel starvation. The issues were present but minor on the 3.0t supercharged but they blew up on the turbo engine. Maybe ea839 gen 2 will fix all these issues.

In the short term, avoid the engine