EPA-verified MPG for all 14 variants (2020–2026)
M340i by model year — click a row to jump to that year
| Year | Best MPG | Avg MPG | Variants |
|---|---|---|---|
| 2026 | 29 MPG | 29 MPG | 2 |
| 2025 | 29 MPG | 29 MPG | 2 |
| 2024 | 26 MPG | 26 MPG | 2 |
| 2023 | 26 MPG | 26 MPG | 2 |
| 2022 | 26 MPG | 26 MPG | 2 |
| 2021 | 26 MPG | 26 MPG | 2 |
| 2020 | 25 MPG | 25 MPG | 2 |