2021 BMW i3s with Range Extender MPG & Specs — Real Fuel Cost
Quick answer
The 2021 BMW i3s with Range Extender gets an EPA-estimated 30/31 MPG (city/highway) and 31 MPG combined, with an estimated $2,450/year fuel cost and 22 g/mi CO₂. Engine: 0.6 L 2-cyl.
The 2021 BMW i3s with Range Extender with the 0.6-liter 2-cylinder premium gasoline engine returns an EPA-estimated 30 MPG in the city and 31 MPG on the highway, for a combined 31 MPG. This page summarizes the official EPA fuel-economy and emissions data for this configuration.
| Engine | 0.6 L 2-cyl |
| Transmission | Automatic (A1) |
| Drive | Rear-Wheel Drive |
| Fuel type | Premium Gasoline |
| Vehicle class | Subcompact Cars |
| MPG — city | 30 |
| MPG — highway | 31 |
| MPG — combined | 31 |
| Annual fuel cost* | $2,450 |
| CO₂ tailpipe | 22 g/mi |
| EPA GHG score | 10/10 |
| Electric range | 200 mi |
How efficient is it?
With a combined 31 MPG, the 2021 BMW i3s with Range Extender sits in the good range for fuel economy. That is about 31% better than the typical Subcompact Cars of its era (24 MPG class average), making it one of the more efficient choices in its class.
Fuel economy and running costs
At about $2,450 per year in fuel (EPA estimate, 15,000 mi/yr), fuel is a major part of the cost of owning the 2021 BMW i3s with Range Extender. Over five years that is roughly $12,250 at today's prices — before insurance, maintenance, and depreciation.
Emissions
The 2021 BMW i3s with Range Extender emits approximately 22 grams of CO₂ per mile at the tailpipe, earning an EPA greenhouse-gas score of 10 out of 10. Lower emissions generally track higher fuel economy.
How to read these numbers
EPA figures come from standardized laboratory test cycles and are the same estimates shown on the vehicle's window sticker. Your real-world mileage depends on driving style, conditions, fuel grade, and maintenance. Use combined MPG and annual fuel cost to compare vehicles fairly.