2023 BMW M340

Research, photos, specs, and expertise

BMW M340 highlights

Customer rating

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(data not available)


  • Excellent handling
  • Modern interior
  • Powerful and fuel-efficient


  • Most driver-assistance features optional
  • Tight rear seat
  • Buried climate controls

Mileage (EPA estimate)

23 city, 31 highway, 26 combined

Pricing for current inventory

(no current inventory)


The 2023 BMW M340i is the high-performance version of the 3 Series sport sedan

The BMW M340i brings the highest level of performance to the 3 Series lineup without going up to the extreme M3. The M340i and the rest of the 3 Series lineup were updated for the 2023 model year with a refreshed exterior style and a new interior design that features a high-tech vibe. Central to the interior redesign is a large curved screen incorporating a 12.3-inch driver display and a 14.9-inch infotainment display under one pane of glass. The infotainment system features the latest BMW operating system. BMW offers the M340i with rear-wheel drive or xDrive all-wheel drive. Under the hood is a BMW M Performance TwinPower Turbo six-cylinder engine that puts out a plentiful 382 horsepower. No manual transmission is available—the engine is teamed with a quick-shifting eight-speed automatic transmission with steering wheel-mounted paddle shifters. The updates to the 3 Series help it to better compete against models like the Mercedes-Benz C-Class, Audi A4, Cadillac CT4, and Genesis G70.

All BMW M340 years

Explore BMW M340 details

I 2WD 4D Sedan

Standard Features

  • ABS Brakes
  • Air Conditioning
  • Alloy Wheels
  • AM/FM Stereo
  • Android Auto
  • Apple CarPlay
  • Automatic Transmission
  • Auxiliary Audio Input
  • Cruise Control
  • Leatherette Seats
  • Memory Seat(s)
  • Navigation System
  • Power Seat(s)
  • Power Windows
  • Rear Defroster
  • Rear Spoiler
  • Rear View Camera
  • Run Flat Tires
  • Satellite Radio Ready
  • Side Airbags
  • Smart Key
  • Sunroof(s)
  • Traction Control
  • Turbo Charged Engine
  • Blind Spot Monitor
  • Front Seat Heaters
  • Head Up Display
  • Heated Steering Wheel
  • Lane Departure Warning
  • Leather Seats
  • Parking Sensors
  • Remote Start

Drive Wheels

Rear Wheel Drive (2WD)

Engine size




Torque (ft-lbs)


Engine type

Turbo Gas

Fuel capacity




Overall length






Leg room

F 42"/R 35.2"

Head room

F 38.7"/R 37.6"

Front tires


Rear tires


Seating capacity




5 reasons to buy the 2023 BMW M340

What We Like

Performance: With 382 horses on tap, the BMW M340i is very quick off the line—especially when equipped with xDrive all-wheel drive. BMW says the M340i xDrive will reach 60 mph in just 4.1 seconds. Like other BMWs, the M340i exhibits outstanding handling with responsive steering and a suspension that rides smoothly but still keeps the car flat in the turns. At the same time, the M340i is comfortable and quiet when cruising down the freeway.

Fuel economy: According to the EPA, the BMW M340i achieves 31 mpg on the highway, 23 mpg in the city, and 26 mpg combined — impressive figures given the car’s performance.

Strangely the all-wheel-drive version gets slightly better estimated fuel economy on the highway. The M340i can cruise more than 400 miles between fill-ups with either version.

Interior: With the redesign of the BMW M340i, the interior has a high-tech vibe with the large curved display screen. The updated infotainment system is easy to configure to put the most used features at the forefront, while other features are just a swipe away. The sport seats up front are both stylish and supportive with multiple adjustments, including an extension for the seat bottom. The rear seats are a little tight for adults but usable in a pinch.

What Needs Improvement

Technology: While the new infotainment system works well, there are some annoyances. It’s easy to change the temperature, but the rest of the climate controls are accessed in a submenu, which can be frustrating. Surprisingly BMW does not make all advanced driver systems standard. For example, we think a luxury car with an as-new price of around $60,000 should come with adaptive cruise control, but it is an added extra on the M340i.

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Ratings & reliability

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2023 BMW M340 trims

Curious how BMW M340 trims differ? Use our side-by-side vehicle comparison to see the differences and similarities


  • 382-hp, 369-lb-ft of torque 3.0L
  • Power Seats
  • Rear Defroster
  • Smart Key
  • Traction Control
  • Rear View Camera
  • Memory Seats
  • Sunroofs
  • Leatherette Seats
  • View our BMW M340 I inventory

I xDrive:

2023 BMW M340 FAQ

* Price excludes taxes, title, registration, and fees. Applicable transfer fees are due in advance of vehicle delivery and are separate from sales transactions.

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