Real-world State of Health (SoH) for the BMW i3, based on 8 aggregated data points across 2019–2019 model years. On average the i3 loses about 2.2% per year — here's what that means for range, resale, and when (if ever) you'd need a replacement.
State of Health vs. mileage, from real i3 data. The curve flattens after the initial break-in drop — the steepest losses happen early, then degradation slows.
| Mileage | Typical SoH | Status | Est. range |
|---|---|---|---|
| 50,000 km | 93.5% | Excellent | 240 km |
| 100,000 km | 90% | Excellent | 231 km |
| 150,000 km | 86.7% | Good | 222 km |
Estimates from aggregated real-world data. Individual results vary with climate, charging habits, and use.
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Based on aggregated real-world data, the BMW i3 loses roughly 2.2% of its capacity per year. At 100,000 km it typically retains about 90% State of Health, and it is covered by a 8-year / 160,000 km battery warranty down to 70% capacity. Most i3 batteries are expected to outlast the rest of the car.
A full BMW i3 pack is around 42.2 kWh. At current installed prices of roughly $120–$180 per kWh, an out-of-warranty replacement would land in the $5,100–$7,600 range — but module-level repair is often far cheaper, and most owners never need it. See our EV battery replacement cost guide.
A used BMW i3 can be an excellent value as long as the battery is healthy. Always check the State of Health before buying — at 86% (typical at higher mileage) the car still delivers strong daily range. Run a free VoltChek estimate and confirm with an OBD2 scanner before you commit.
Two ways: get an instant data-driven estimate from VoltChek using your year and mileage (free, no hardware), or read the exact value from the car's Battery Management System with an OBD2 scanner. We recommend starting with the free estimate, then verifying with a scanner.