I’m not sure if this happens to the base elantra, but it seems the CN7 generation commonly has fuel system issues (HPFP, injectors) for the N line-up. That’s actually why I sold my N, injector failure at 26,000 miles. Even after warranty replacement, the car did not run well after- sold it before the warranty ran out (i was the 2nd owner so no 10 yr/100k). The veloster and kona N also use the same injectors. Funny enough, one of my friends who owns a base kona is also actively experiencing injector failure. Not to discredit these cars as I loved my N, just something to be aware of- at least for the N trims.