well i baught my fd some months ago it runs and stuff but the guy told me it has a mazda reman. engine about 40k before i baught it how do i find out if this is true? is there a way i can run some numbers or anything?

do a carfax or ask for service reports from the guy

i did the carfax it never says motor replace my caR SHOWS 121K IS IT REALLY POSSIBLE ITS STILL THE STOCK MOTOR? i mean we know the rep. of the fd's and it still runs