Ignition coil HITACHI or Bremi

Hitachi IGC0003 from Rock auto, 3 years, zero issues.

My 2018 Civic is Hitachi.

I have OEM Bremi coil pack now. the original Bremi OEM coil went 15+ years and survived 1 OEM cat and 2 magnaflow cats.

I replaced all coils with Bremi 20128 red tops and used liquid electric tape to reinsulate the exposed wire.

Replaced it with OEM Bremi coil (Made in Turkey), same as in car when new. Cost $110. with tax and shipping. Runs smoother than with the aftermarket.

I changed all 6 coils on mine for those last year and they've worked without any issues.

I'd replace the FPR with a 3BAR since they are cheap and easy to replace and considering your mods. New coolant temp sensors for the same reasons as well even though you state they are ok. Coil could be an issue, no real need to upgrade the factory ones but a new one could resolve the problem (Bremi coils are using STI [brand not car] windings in the units).

Just installed the new coil and the car runs great. Very pleased with the results.

I also ordered four (4) new ignition coils from Hitachi, installed them 60 miles ago and it's been smooth since the installation. My car is quieter, more responsive, and idles better. No, check engine lights at all.

Car always kills them. I was the most surprised when it killed the Hitachi coils.