What happened to my engine?
 

Hey guys, it's been a really long time since posting here.

One night back in 2013, I was pushing my car really hard on some backroads, and when I came back into my neighborhood just cruising at about 35mph, I turned onto my street and as soon as I pushed the throttle to accelerate, there was a loud *pop* sound in the engine bay and the car just died. I coasted to my driveway and shut of the car. Tried to restart and it restarted, but it sounded really cacophonous and the whole car was shaking. It died again within 6 seconds and then it wouldn't restart again. Just turning over.

The engine had about 55k miles on it (factory replacement) and never had any issues with it until then.

Unfortunately, I had to leave for Korea the following week, so I had the car towed to my parent's house and it's just been sitting in their driveway since 2013. But I will be visiting home next month and so I want to see what going on with the car.

Based on this vague description, what are the damages to the engine?

What happened to my engine?
 

It could be many things. Without knowing any further details, there isn't much to help you with.
Places you can start checking (use the search feature on how to test these parts):
CELs
Catalytic converter
Spark plugs/coils
Battery/ fuses
Engine compression...

Thanks for your response, Soldier.

I know it's practically impossible to know without actually looking into the engine. I guess I was just curious as to whether the damage was catastrophic or not.

I'm planning to have the car towed to a local garage for a diagnosis. It's hard to coordinate from anther country though lol.

Find a Mazda dealer or rotary specialist. Local garages often have no clue.

It would help to know what maintenance had been done to the engine prior to failure.