Charting Battery Capacity/ State of Health Over Multiple Years

[3pete]

I assume that you wrote BimmerLink's description of DTC 21F137. If so, that doesn't make much sense with an 80% SOH.

The BMW fault code Website lists a variety of descriptions for DTC 21F137 depending on the SME version. On an ISTA report for our 2021 i3, the SME version is SME_I1 which isn't listed under DTC 21F137. Maybe your i3 has a different SME version and 21F137 isn't a DTC for SME_I1. Or maybe the BMW fault code Website is missing the i3 description for DTC 21F137. I hope that ISTA would provide a better description for DTC 21F137 on an i3.

Correct-- that's the description BimmerLink gives, which I found interesting. If the description is to be believed, it makes me think there is yet another way to measure capacity that yields a result different than the 4+ I've been tracking.