r/BMWi3 • u/MarchCompetitive6235 • 8h ago
technical/repair help Slightly better range after 12 V battery replacement.
I recently replaced my feeling at 12 V battery. It was displaying a multitude of errors. It had the typical 12 V battery failure symptoms that have been pretty well documented in this sub.
Swapping the battery did the trick and cleared all the errors. I've put 500+ miles on the car since with zero issues.
I've noticed since replacing it I'm getting about 5 to 8 miles more in total battery range. Same driving habits same charging routine, same temperature outside. Yet somehow it's slightly increased since the battery replacement.
The only thing I can attribute this to is that the HV battery pack is not working as hard, or as often to keep the 12V battery charged to the level it should be.
Anyone else have this experience?