Lowest Emission Vehicles
The 2020 BMW i3 leads at 22 g/mi, followed by the Toyota Prius Prime at 50 g/mi.
Tailpipe CO2 tracks fuel burned almost exactly, so this ranking mirrors fuel economy — with one exception: battery-electric vehicles emit nothing at the tailpipe and sit at zero.
| # | Vehicle | Tailpipe CO2 |
|---|---|---|
| 1 | 2020 BMW i3 | 22 g/mi |
| 2 | 2023 Toyota Prius Prime | 50 g/mi |
| 3 | 2025 Toyota Prius | 50 g/mi |
| 4 | 2023 Ford Escape | 52 g/mi |
| 5 | 2025 Kia Sportage | 55 g/mi |
| 6 | 2020 Honda Clarity | 57 g/mi |
| 7 | 2020 Karma Revero | 70 g/mi |
| 8 | 2021 Karma GS-6 | 70 g/mi |
| 9 | 2023 Kia Niro | 71 g/mi |
| 10 | 2025 Toyota RAV4 | 72 g/mi |
| 11 | 2024 Toyota RAV4 Prime | 72 g/mi |
| 12 | 2022 Hyundai Ioniq | 74 g/mi |
| 13 | 2025 Mercedes-Benz GLC-Class | 84 g/mi |
| 14 | 2022 Lexus NX | 87 g/mi |
| 15 | 2025 Lexus RX | 89 g/mi |
| 16 | 2020 Polestar 1 | 93 g/mi |
| 17 | 2020 Kia Optima | 97 g/mi |
| 18 | 2026 Mitsubishi Outlander | 97 g/mi |
| 19 | 2025 Mercedes-Benz GLE-Class | 99 g/mi |
| 20 | 2023 Volvo S60 | 99 g/mi |
| 21 | 2023 Volvo V60 | 99 g/mi |
| 22 | 2020 Ford Fusion | 99 g/mi |
| 23 | 2022 Hyundai Tucson | 100 g/mi |
| 24 | 2025 Land Rover Range Rover | 102 g/mi |
| 25 | 2024 Kia Sorento | 105 g/mi |
Source: EPA fuel economy test data via fueleconomy.gov, model years 2020 and later. One row per model, using its best-performing configuration.
What this list doesn't tell you
Tailpipe output excludes emissions from producing the fuel or electricity. For an EV, the upstream figure depends on how your regional grid generates power.