2023 BMW M340
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)
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
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
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.
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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2023 BMW M340 trims
I:
- 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
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:
- Rear Spoiler
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