BMW M340I MPG by Year & Engine (EPA)
EPA fuel-economy ratings for every rated BMW M340I model year from 2020 to 2026 — each engine and transmission with its official city, highway and combined figures. Over these years the M340I has been offered with 3.0L 6-cyl, 3.0L 4-cyl engines; the most efficient version is the 2026 (up to 29 MPG combined). Every rated gas version calls for premium gasoline. Data: U.S. Department of Energy & EPA, fueleconomy.gov; prices are live medians from VehiSales listings.
BMW M340I fuel economy by year
| Year | Combined | Engines | Median used price | For sale |
|---|---|---|---|---|
| 2026 | 29 MPG | 3.0L 6-cyl | — | — |
| 2025 | 29 MPG | 3.0L 4-cyl | — | — |
| 2024 | 26 MPG | 3.0L 6-cyl | $51,998 | 12 listings |
| 2023 | 26 MPG | 3.0L 6-cyl | — | — |
| 2022 | 26 MPG | 3.0L 6-cyl | — | — |
| 2021 | 25–26 MPG | 3.0L 6-cyl | $35,650 | 6 listings |
| 2020 | 25 MPG | 3.0L 6-cyl | $34,746 | 8 listings |
2026 BMW M340I: engines & MPG
The 2026 M340I was EPA-rated in 2 versions (3.0L 6-cyl), with combined economy of 29 MPG.
| Version | Engine | Transmission | Fuel | City | Hwy | Combined |
|---|---|---|---|---|---|---|
| M340i xDrive Sedan | 3.0L 6-cyl | Automatic (S8) | Premium | 26 | 33 | 29 MPG |
| M340i Sedan | 3.0L 6-cyl | Automatic (S8) | Premium | 27 | 33 | 29 MPG |
2025 BMW M340I: engines & MPG
The 2025 M340I was EPA-rated in 2 versions (3.0L 4-cyl), with combined economy of 29 MPG.
| Version | Engine | Transmission | Fuel | City | Hwy | Combined |
|---|---|---|---|---|---|---|
| M340i xDrive Sedan | 3.0L 4-cyl | Automatic (S8) | Premium | 26 | 33 | 29 MPG |
| M340i Sedan | 3.0L 4-cyl | Automatic (S8) | Premium | 27 | 33 | 29 MPG |
2024 BMW M340I: engines & MPG
The 2024 M340I was EPA-rated in 2 versions (3.0L 6-cyl), with combined economy of 26 MPG. Used 2024 models currently list for a median of $51,998 on VehiSales (12 for sale).
| Version | Engine | Transmission | Fuel | City | Hwy | Combined |
|---|---|---|---|---|---|---|
| M340i xDrive Sedan | 3.0L 6-cyl | Automatic (S8) | Premium | 23 | 31 | 26 MPG |
| M340i Sedan | 3.0L 6-cyl | Automatic (S8) | Premium | 23 | 31 | 26 MPG |
2023 BMW M340I: engines & MPG
The 2023 M340I was EPA-rated in 2 versions (3.0L 6-cyl), with combined economy of 26 MPG.
| Version | Engine | Transmission | Fuel | City | Hwy | Combined |
|---|---|---|---|---|---|---|
| M340i xDrive Sedan | 3.0L 6-cyl | Automatic (S8) | Premium | 23 | 32 | 26 MPG |
| M340i Sedan | 3.0L 6-cyl | Automatic (S8) | Premium | 23 | 31 | 26 MPG |
2022 BMW M340I: engines & MPG
The 2022 M340I was EPA-rated in 2 versions (3.0L 6-cyl), with combined economy of 26 MPG.
| Version | Engine | Transmission | Fuel | City | Hwy | Combined |
|---|---|---|---|---|---|---|
| M340i xDrive Sedan | 3.0L 6-cyl | Automatic (S8) | Premium | 23 | 32 | 26 MPG |
| M340i Sedan | 3.0L 6-cyl | Automatic (S8) | Premium | 23 | 32 | 26 MPG |
2021 BMW M340I: engines & MPG
The 2021 M340I was EPA-rated in 2 versions (3.0L 6-cyl), with combined economy from 25 to 26 MPG. Used 2021 models currently list for a median of $35,650 on VehiSales (6 for sale).
| Version | Engine | Transmission | Fuel | City | Hwy | Combined |
|---|---|---|---|---|---|---|
| M340i | 3.0L 6-cyl | Automatic (S8) | Premium | 23 | 32 | 26 MPG |
| M340i xDrive | 3.0L 6-cyl | Automatic (S8) | Premium | 22 | 31 | 25 MPG |
2020 BMW M340I: engines & MPG
The 2020 M340I was EPA-rated in 2 versions (3.0L 6-cyl), with combined economy of 25 MPG. Used 2020 models currently list for a median of $34,746 on VehiSales (8 for sale).
| Version | Engine | Transmission | Fuel | City | Hwy | Combined |
|---|---|---|---|---|---|---|
| M340i | 3.0L 6-cyl | Automatic (S8) | Premium | 22 | 30 | 25 MPG |
| M340i xDrive | 3.0L 6-cyl | Automatic (S8) | Premium | 22 | 30 | 25 MPG |
Frequently asked questions
What MPG does a BMW M340I get?
Depending on year and engine, EPA combined ratings for the M340I range from 25 to 29 MPG. The most efficient rated version is the 2026 model year.
What engines does the 2026 BMW M340I have?
The 2026 M340I was EPA-rated with 3.0L 6-cyl engines — see the 2026 table above for each version's exact city/highway figures.
Does the BMW M340I require premium gas?
Yes — every EPA-rated gas M340I version specifies premium gasoline.
Is there a hybrid or electric M340I?
Yes — the ratings above include hybrid versions; look for them in the per-year tables.
https://vehisales.com/research/fuel-economy/bmw/m340i.
Fuel economy of other models
BMW X3 MPG by year · BMW X5 MPG by year · BMW 3-Series MPG by year
See also: BMW M340I hub — live listings, prices & reliability · Used BMW M340I prices by year · Most fuel-efficient cars by segment · Model price trends. Media inquiries: [email protected].