Mazda 3 2014 engine problem

I was hoping the community can shine some light
onto this issue I am having. I bought a brand new
Mazda 3 2014 S touring sedan in April of 2014.
About 25k miles into the car, the engine lost all of
its engine oil and failed. It was not able to be
salvaged  so it still being under the warranty,
Mazda replaced the whole engine with a new one.
Now I am at around 77000k miles into it. The
engine just shut off while I was driving into a drive
way and the engine warning light is on. The car
was able to be started back up right way and I
took it to a dealership immediately after work.
Am I responsible for the repair cost? I drove less
than 60k miles since the new engine was installed
so shouldnt it still be under the warranty?