2023 BMW M340 review
BMW M340 highlights
Customer rating
(not yet rated)
RepairPal reliability rating
(data not available)
Pros
- Excellent handling
- Modern interior
- Powerful and fuel-efficient
Cons
- 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)
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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
2023 BMW M340 trims
Curious how BMW M340 trims differ? Use our side-by-side vehicle comparison to see the differences and similaritiesI:
- 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:
- Includes all features available on the I
- Power Mirrors
- 4WD/AWD
- View our BMW M340 I xDrive inventory
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
Customer ratings
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BMW M340 features and specs
Curious how BMW M340 trims differ? Use our side-by-side vehicle comparison to see the differences and similarities
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 Locks
- 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
3.0L
Horsepower
382
Torque (ft-lbs)
369
Engine type
Turbo Gas
Fuel capacity
15.6
Wheelbase
112.2"
Overall length
185.7"
Width
71.9"
Height
56.4"
Leg room
F 42"/R 35.2"
Head room
F 38.7"/R 37.6"
Front tires
P225/45HR18
Rear tires
P225/45HR18
Seating capacity
5
Transmission
Automatic
2023 BMW M340 FAQ
The 2023 BMW M340 is available in multiple trims, each with its own estimated fuel economy, here are the EPA estimates for each trim:
- I: 23 MPG City and 31 MPG Highway
- I xDrive: 23 MPG City and 32 MPG Highway
Here is what's new for the 2023 BMW M340:
- Automated Parking
- Rear Spoiler
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We hope you found this information helpful. This content is intended to inform and is not meant to indicate that a particular vehicle is currently available or recommended for you.
Statements of fuel economy or EV range are based on EPA and other third-party estimates for vehicles when new. Fuel economy and EV range will degrade with time and vary based on age, driving conditions, vehicle history, and other conditions. See fueleconomy.gov for more info.
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