BMW · Subcompact cars · Plug-in hybrid
BMW i3 Plug-in hybrid: MPG and annual fuel cost, 2021
The BMW i3 Plug-in hybrid was last rated in the data for model year 2021, at 31 MPG combined, 2nd of 5 subcompact cars, in the top quarter, ahead of 75% of the others.
- 31MPG combined2nd of 5 in class
- $2,650a year in fuel2nd of 5 in class
- 22g/mile CO2
Where it stands
The subcompact cars rated for 2021 run from 15 to 113 MPG, with a median of 26 MPG.
Among all plug-in hybrid models of the year, regardless of size, it is 2nd of 7 plug-in hybrid models, in the top quarter, ahead of 83% of the others.
In its class, just ahead of it is the BMW i3 Electric at 113 MPGe and just behind it is the Karma GS-6 at 26 MPG.
A plug-in hybrid can run on its battery for a distance and then on fuel. The MPG, fuel cost and CO2 figures on this site are for running on fuel with the battery depleted, so a driver who charges often will use less fuel than shown.
Fuel cost and CO2
Assuming 15,000 miles a year with 55% of them in the city and premium gasoline at $5.48 per gallon, fuelling the most efficient version comes to about $2,650 a year. That is $500 less than the subcompact cars median of $3,150.
Tailpipe CO2 is 22 g/mile, 48 g/mile below the subcompact cars median of 70.
Rated versions
Its city rating is 30 and its highway rating 31: the highway figure is 1 higher. 2 versions are rated for 2021. All of them share the same combined rating of 31 MPG.
| Version | Combined MPG | City MPG | Highway MPG | Annual fuel cost | CO2 g/mile | Electric range |
|---|---|---|---|---|---|---|
| i3 with Range Extender: 0.6 L, 2 cyl hybrid, Automatic (A1), RWD | 31 | 30 | 31 | $2,650 | 22 | 126 |
| i3s with Range Extender: 0.6 L, 2 cyl hybrid, Automatic (A1), RWD | 31 | 30 | 31 | $2,650 | 22 | 126 |
Year by year
The BMW i3 Plug-in hybrid is in the data for 3 of the 8 model years from 2019 to 2026. The headline rating did not move between 2019 and 2021: 31 MPG both times.
| Model year | Versions | Best MPG | Lowest MPG | Fuel cost | CO2 g/mi | Class median |
|---|---|---|---|---|---|---|
| 2021 | 2 | 31 | 31 | $2,650 | 22 | 26 |
| 2020 | 2 | 31 | 31 | $2,650 | 22 | 26 |
| 2019 | 2 | 31 | 31 | $2,650 | 22 | 25 |
Similar models
| Model | Powertrain | Combined MPG | Annual fuel cost | Model year |
|---|---|---|---|---|
| Karma GS-6 | Plug-in hybrid | 26 | $3,150 | 2021 |
| Audi TTS | Gasoline | 25 | $3,300 | 2021 |
| Roush Performance Mustang | Gasoline | 15 | $5,500 | 2021 |
| BMW i3 Electric | Electric | 113 | $650 | 2021 |
Compare and rank
Rankings: Subcompact cars.
Data: US EPA and DOE, as prepared in methods and data.