BMW M340i: MPG and fuel economy by year

The EPA has rated the BMW M340i across 2 model years, from the 2020 BMW M340i through the 2021 BMW M340i. The most recent 2021 BMW M340i returns 26 combined MPG.

Pick a year below to open the full BMW M340i page for that model year. Each year page covers combined, city, and highway MPG, the trim variants the EPA rates separately, the annual fuel cost across three driving patterns, and a year-over-year comparison so you can see whether the car has improved.

Fuel economy by model year

Combined MPG, city MPG, highway MPG, and the EPA's estimated annual fuel cost for every model year of the BMW M340i. Click any year to see the full breakdown for that model year, including trim variants, the drivetrain, and a comparison against other vehicles in its segment.

Year	Model	Combined MPG	City	Highway	Annual fuel cost
2021	2021 BMW M340i	26 MPG	23 MPG	32 MPG	$2,650
2020	2020 BMW M340i	25 MPG	22 MPG	30 MPG	$2,750

How the BMW M340i compares against the Compact Cars class

Buyers usually compare the BMW M340i against other cars in the same EPA class. The list below shows the most efficient cars in the Compact Cars class for the 2021 model year, the latest year on this page. Each link opens the full page for that car.

Source: U.S. EPA fuel economy dataset. Annual fuel cost assumes 15,000 miles of driving per year and a 55% city, 45% highway split.