I THINK the older ones didn't/don't have the same issues, at least not nearly as common if I remember correctly. Somewhere around 2014/15 they made some slight changes I believe, in both design and manufacturing. Is yours a GDI? I know mine, a 2015 model year, was a complete redesign, but other than some tweaks, the engines were pretty similar.
Not a Theta II but this problem seems to plague a lot of H/K 4 cylinders. Here's a 2024 K5 with a blown 1.6T at 90k miles. Second owner so 10/100 doesn't apply. Engine itself is $11k before labor. Car is basically a total loss at 2 years old.