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BMW M340i Gas Tank Size (2020-2026)

Researched By The AutoPadre Research Team

Last Updated 2026-09-02

The BMW M340i gas tank sizes range from 15.0 gallons to 15.6 gallons as specified in our data below, organized by trim, option package, and model year.

The gas tank size of the BMW M340i, when combined with its fuel mileage, gives the M340i the following ranges depending on the model year and options:

City range from 330 miles to 421 miles
Highway range from 465 miles to 515 miles

Check out the Gas Tank Size specifications for other makes and models.

2026 BMW M340i Gas Tank Size

The 2026 BMW M340i gas tank size is 15.6 gallons.

On a full tank of fuel, the 2026 BMW M340i has the following ranges depending on the trim level:

City range from 406 miles to 421 miles
Highway range of 515 miles

2026 BMW M340i Gas Tank Size (Imp.)
Trim	Engine \| Transmission \| Drivetrain	Gas Tank Size	Range (miles)
Base Sedan	3.0L \| Turbo \| Hybrid \| 6 Cyl. \| 8 Spd Auto w/OD \| RWD	15.6 gal.	421 city \| 515 hwy \| 452 combined
NA Sedan	3.0L \| Turbo \| Hybrid \| 6 Cyl. \| 8 Spd Auto w/OD \| RWD	15.6 gal.	421 city \| 515 hwy \| 452 combined
NA xDrive Sedan	3.0L \| Turbo \| Hybrid \| 6 Cyl. \| 8 Spd Auto w/OD \| AWD	15.6 gal.	406 city \| 515 hwy \| 452 combined
xDrive Sedan	3.0L \| Turbo \| Hybrid \| 6 Cyl. \| 8 Spd Auto w/OD \| AWD	15.6 gal.	406 city \| 515 hwy \| 452 combined

2026 BMW M340i Gas Tank Size (Metric)
Trim	Engine \| Transmission \| Drivetrain	Gas Tank Size	Range (km)
Base Sedan	3.0L \| Turbo \| Hybrid \| 6 Cyl. \| 8 Spd Auto w/OD \| RWD	59.1 liters	678 city \| 829 hwy \| 727 combined
NA Sedan	3.0L \| Turbo \| Hybrid \| 6 Cyl. \| 8 Spd Auto w/OD \| RWD	59.1 liters	678 city \| 829 hwy \| 727 combined
NA xDrive Sedan	3.0L \| Turbo \| Hybrid \| 6 Cyl. \| 8 Spd Auto w/OD \| AWD	59.1 liters	653 city \| 829 hwy \| 727 combined
xDrive Sedan	3.0L \| Turbo \| Hybrid \| 6 Cyl. \| 8 Spd Auto w/OD \| AWD	59.1 liters	653 city \| 829 hwy \| 727 combined

2025 BMW M340i Gas Tank Size

The 2025 BMW M340i gas tank size is 15.6 gallons.

On a full tank of fuel, the 2025 BMW M340i has the following ranges depending on the trim level:

City range from 406 miles to 421 miles
Highway range of 515 miles

2025 BMW M340i Gas Tank Size (Imp.)
Trim	Engine \| Transmission \| Drivetrain	Gas Tank Size	Range (miles)
Base Hybrid	3.0L \| Turbo \| 6 Cyl. \| Hybrid \| 8 Spd Auto w/OD \| RWD	15.6 gal.	421 city \| 515 hwy \| 468 combined
xDrive Hybrid	3.0L \| Turbo \| 6 Cyl. \| Hybrid \| 8 Spd Auto w/OD \| AWD	15.6 gal.	406 city \| 515 hwy \| 468 combined

2025 BMW M340i Gas Tank Size (Metric)
Trim	Engine \| Transmission \| Drivetrain	Gas Tank Size	Range (km)
Base Hybrid	3.0L \| Turbo \| 6 Cyl. \| Hybrid \| 8 Spd Auto w/OD \| RWD	59.1 liters	678 city \| 829 hwy \| 753 combined
xDrive Hybrid	3.0L \| Turbo \| 6 Cyl. \| Hybrid \| 8 Spd Auto w/OD \| AWD	59.1 liters	653 city \| 829 hwy \| 753 combined

2024 BMW M340i Gas Tank Size

The 2024 BMW M340i gas tank size is 15.6 gallons.

On a full tank of fuel, the 2024 BMW M340i has the following ranges:

City range of 359 miles
Highway range of 484 miles

2024 BMW M340i Gas Tank Size (Imp.)
Trim	Engine \| Transmission \| Drivetrain	Gas Tank Size	Range (miles)
Base Luxury	3.0L \| Turbo \| 6 Cyl. \| Hybrid \| 8 Spd Auto w/OD \| RWD	15.6 gal.	359 city \| 484 hwy \| 421 combined
xDrive Luxury	3.0L \| Turbo \| 6 Cyl. \| Hybrid \| 8 Spd Auto w/OD \| AWD	15.6 gal.	359 city \| 484 hwy \| 421 combined

2024 BMW M340i Gas Tank Size (Metric)
Trim	Engine \| Transmission \| Drivetrain	Gas Tank Size	Range (km)
Base Luxury	3.0L \| Turbo \| 6 Cyl. \| Hybrid \| 8 Spd Auto w/OD \| RWD	59.1 liters	578 city \| 779 hwy \| 678 combined
xDrive Luxury	3.0L \| Turbo \| 6 Cyl. \| Hybrid \| 8 Spd Auto w/OD \| AWD	59.1 liters	578 city \| 779 hwy \| 678 combined

2023 BMW M340i Gas Tank Size

The 2023 BMW M340i gas tank size is 15.0 gallons.

On a full tank of fuel, the 2023 BMW M340i has the following ranges depending on the trim level:

City range of 345 miles
Highway range from 465 miles to 480 miles

2023 BMW M340i Gas Tank Size (Imp.)
Trim	Engine \| Transmission \| Drivetrain	Gas Tank Size	Range (miles)
Base Sedan	3.0L \| Intercooled Turbo \| I6 \| 8 Spd Auto w/OD \| RWD	15.0 gal.	345 city \| 465 hwy \| 405 combined
xDrive Sedan	3.0L \| Intercooled Turbo \| I6 \| 8 Spd Auto w/OD \| AWD	15.0 gal.	345 city \| 480 hwy \| 412 combined

2023 BMW M340i Gas Tank Size (Metric)
Trim	Engine \| Transmission \| Drivetrain	Gas Tank Size	Range (km)
Base Sedan	3.0L \| Intercooled Turbo \| I6 \| 8 Spd Auto w/OD \| RWD	56.8 liters	555 city \| 748 hwy \| 652 combined
xDrive Sedan	3.0L \| Intercooled Turbo \| I6 \| 8 Spd Auto w/OD \| AWD	56.8 liters	555 city \| 772 hwy \| 663 combined

2022 BMW M340i Gas Tank Size

The 2022 BMW M340i gas tank size is 15.0 gallons.

On a full tank of fuel, the 2022 BMW M340i has the following ranges:

City range of 345 miles
Highway range of 480 miles

2022 BMW M340i Gas Tank Size (Imp.)
Trim	Engine \| Transmission \| Drivetrain	Gas Tank Size	Range (miles)
Base Sedan	3.0L \| Intercooled Turbo \| I6 \| 8 Spd Auto w/OD \| RWD	15.0 gal.	345 city \| 480 hwy \| 412 combined
North America Sedan	3.0L \| Intercooled Turbo \| I6 \| 8 Spd Auto w/OD \| RWD	15.0 gal.	345 city \| 480 hwy \| 412 combined
xDrive Sedan	3.0L \| Intercooled Turbo \| I6 \| 8 Spd Auto w/OD \| AWD	15.0 gal.	345 city \| 480 hwy \| 412 combined
xDrive North America Sedan	3.0L \| Intercooled Turbo \| I6 \| 8 Spd Auto w/OD \| AWD	15.0 gal.	345 city \| 480 hwy \| 412 combined

2022 BMW M340i Gas Tank Size (Metric)
Trim	Engine \| Transmission \| Drivetrain	Gas Tank Size	Range (km)
Base Sedan	3.0L \| Intercooled Turbo \| I6 \| 8 Spd Auto w/OD \| RWD	56.8 liters	555 city \| 772 hwy \| 663 combined
North America Sedan	3.0L \| Intercooled Turbo \| I6 \| 8 Spd Auto w/OD \| RWD	56.8 liters	555 city \| 772 hwy \| 663 combined
xDrive Sedan	3.0L \| Intercooled Turbo \| I6 \| 8 Spd Auto w/OD \| AWD	56.8 liters	555 city \| 772 hwy \| 663 combined
xDrive North America Sedan	3.0L \| Intercooled Turbo \| I6 \| 8 Spd Auto w/OD \| AWD	56.8 liters	555 city \| 772 hwy \| 663 combined

2021 BMW M340i Gas Tank Size

The 2021 BMW M340i gas tank size is 15.0 gallons.

On a full tank of fuel, the 2021 BMW M340i has the following ranges depending on the trim level:

City range from 330 miles to 345 miles
Highway range from 465 miles to 480 miles

2021 BMW M340i Gas Tank Size (Imp.)
Trim	Engine \| Transmission \| Drivetrain	Gas Tank Size	Range (miles)
3 Series Sedan	3.0L \| Intercooled Turbo \| I6 \| 8 Spd Auto w/OD \| RWD	15.0 gal.	345 city \| 480 hwy \| 412 combined
3 Series Sedan	3.0L \| Intercooled Turbo \| I6 \| 8 Spd Auto w/OD \| AWD	15.0 gal.	330 city \| 465 hwy \| 397 combined

2021 BMW M340i Gas Tank Size (Metric)
Trim	Engine \| Transmission \| Drivetrain	Gas Tank Size	Range (km)
3 Series Sedan	3.0L \| Intercooled Turbo \| I6 \| 8 Spd Auto w/OD \| RWD	56.8 liters	555 city \| 772 hwy \| 663 combined
3 Series Sedan	3.0L \| Intercooled Turbo \| I6 \| 8 Spd Auto w/OD \| AWD	56.8 liters	531 city \| 748 hwy \| 639 combined

2020 BMW M340i Gas Tank Size

The 2020 BMW M340i gas tank size is 15.6 gallons.

On a full tank of fuel, the 2020 BMW M340i has the following ranges:

City range of 343 miles
Highway range of 468 miles

2020 BMW M340i Gas Tank Size (Imp.)
Trim	Engine \| Transmission \| Drivetrain	Gas Tank Size	Range (miles)
Base Sedan	3.0L \| Intercooled Turbo \| I6 \| 8 Spd Auto w/OD \| RWD	15.6 gal.	343 city \| 468 hwy \| 405 combined
North America Sedan	3.0L \| Intercooled Turbo \| I6 \| 8 Spd Auto w/OD \| RWD	15.6 gal.	343 city \| 468 hwy \| 405 combined
xDrive Sedan	3.0L \| Intercooled Turbo \| I6 \| 8 Spd Auto w/OD \| AWD	15.6 gal.	343 city \| 468 hwy \| 405 combined
Base Sedan	3.0L \| Intercooled Turbo \| I6 \| 8 Spd Auto w/OD \| RWD	15.6 gal.	343 city \| 468 hwy \| 405 combined
Base Sedan	3.0L \| Intercooled Turbo \| I6 \| 8 Spd Auto w/OD \| AWD	15.6 gal.	343 city \| 468 hwy \| 405 combined

2020 BMW M340i Gas Tank Size (Metric)
Trim	Engine \| Transmission \| Drivetrain	Gas Tank Size	Range (km)
Base Sedan	3.0L \| Intercooled Turbo \| I6 \| 8 Spd Auto w/OD \| RWD	59.1 liters	552 city \| 753 hwy \| 652 combined
North America Sedan	3.0L \| Intercooled Turbo \| I6 \| 8 Spd Auto w/OD \| RWD	59.1 liters	552 city \| 753 hwy \| 652 combined
xDrive Sedan	3.0L \| Intercooled Turbo \| I6 \| 8 Spd Auto w/OD \| AWD	59.1 liters	552 city \| 753 hwy \| 652 combined
Base Sedan	3.0L \| Intercooled Turbo \| I6 \| 8 Spd Auto w/OD \| RWD	59.1 liters	552 city \| 753 hwy \| 652 combined
Base Sedan	3.0L \| Intercooled Turbo \| I6 \| 8 Spd Auto w/OD \| AWD	59.1 liters	552 city \| 753 hwy \| 652 combined