It's always a little jarring to me to see a seemingly competently laid out automotive grade PCB, with a cheap as dirt Amazon special D1 mini ESP board lovingly stapled in one corner.
Best rating you can get on those ESP modules is "blue PCB".
Best rating you can get on those ESP modules is "blue PCB".
If you like, you can leave it on and monitor your EV data via the web interface. But if the D1 flakes out the VCU will be unaffected.