Experiencing sudden power failure/engine shutoff while driving. All other systems remain on, and car easily restarts. Have recently replaced battery and starter (starter was recalled apparently), and have experienced the issue before and after these replacements.

This is happening while driving down various streets at speed limit, so nothing unusual taking place from a driving standpoint.

All insights into what is happening are appreciated

 

Might be 'Main Relay' (aka 'fuel pump relay' and 'PGM-FI relay') as it has several failure modes...

Everything there is to know about your Honda/Acura main relay:
How the Main Relay works
When the Main Relay goes bad

 

I agree with Tosh

 

Happened to me too. Most Likely the Fuel Pump Relay. I resoldered and worked for about 6 months. Just ordered a new one.

 

Check your grounds in the engine bay..

I had a similar problem, redid my grounds & no issues since..

 

Thanks all for the great feedback. Will go through process of elimination now...