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2021 BMW M340 review

Research, photos, specs, and expertise

BMW M340 highlights

Customer rating

(not yet rated)

RepairPal reliability rating

(data not available)

Pros

  • Polished handling and performance
  • Tastefully modern interior with plenty of room
  • Powerful engine

Cons

  • Infotainment system can be complicated to use
  • Most of the 3 Series' advanced driver assist features aren't standard

Mileage (EPA estimate)

22 city, 30 highway, 25 combined

Pricing for current inventory

(no current inventory)

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The 2021 BMW M340i is a compelling mix of strong performance and daily practicality

Powered by a turbocharged six-cylinder engine and underpinned by a sport-tuned suspension, the 2021 BMW M340i doesn’t lack for performance. Available all-wheel drive adds foul-weather capability to the mix, making it an excellent choice for driving enthusiasts who want a little extra thrill in their daily drive but can’t give up daily practicality.

There’s a lot to like about the BMW 3 Series in general, and the M340i in particular. The drivetrain and suspension combine for excellent driving dynamics. The M Sport performance package dials up handling a notch, at the expense of ride quality. Inside, the M340i features premium trim like leather seating surfaces and plenty of modern high-tech features like smartphone integration and advanced driver assist on the options menu.

As good as the M340i is though, competitors haven’t stood still. Aside from the traditional BMW grille, the styling borders on generic, especially from the rear. Additionally, many features that are standard on competitors are on the options sheet, making finding a fully equipped model challenging.

All BMW M340 years

What is new for the 2021 BMW M340?

  • M340 trims have been upgraded with Lane Departure Warning and Android Auto as standard equipment this year.
  • Rear Seat Heaters and Power Hatch/Deck Lid features are now available as options on select trims.

2021 BMW M340 trims

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

I:

  • 382-hp, 369-lb-ft of torque 3.0L
  • Rear View Camera
  • Lane Departure Warning
  • Sunroofs
  • Rear Defroster
  • Cruise Control
  • Power Seats
  • Memory Seats
  • Power Mirrors
  • View our BMW M340 I inventory

I xDrive:

What We Like

Performance: There’s no question that the 2021 M340i upholds the BMW tradition of driving performance. The powerful turbocharged 6-cylinder is a joy to drive, and the powerful brakes are an unsung hero in the dynamics department. While the M Sport package may firm up the suspension too much for some tastes, there’s no denying it enhances the performance experience.

Practicality: As fun as the M340i is to drive, it’s also a completely practical four-door sedan in the day-to-day grind. The comfortable interior has plenty of space for four, and the trunk also has plenty of space. The rear seatbacks even fold down in a 40/20/40 split to accommodate larger objects.

Interior Design: BMW designs its interiors around the driver, which means everything is within easy reach, and for the most part easy to use. There are definitely worse places to spend time behind the wheel.

What Needs Improvement

Too many features are optional: New-car shoppers can enjoy the experience of customizing their BMW through the extensive options list, but with so many features on the options list, it can be difficult for used-car shoppers to navigate. This is especially true for advanced driver assist systems, which are all optional on the M340i, and divided between two groups: Driving Assistance and Driving Assistance Professional packages. We consider these systems very useful for buyers, so keep an eye out for those packages.

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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
  • Bluetooth Technology
  • Cruise Control
  • Heated Mirrors
  • Lane Departure Warning
  • Leatherette Seats
  • Memory Seat(s)
  • Navigation System
  • Overhead Airbags
  • Power Locks
  • Power Mirrors
  • 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

Optional Features

  • Automated Cruise Control
  • Automated Parking
  • Blind Spot Monitor
  • Front Seat Heaters
  • Harman Kardon Sound
  • Head Up Display
  • Heated Steering Wheel
  • Lane Departure Warning
  • Leather Seats
  • Parking Sensors
  • Power Hatch/Deck Lid
  • Rear Seat Heaters
  • Rear Spoiler
  • Rear View Camera
  • 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

P225/45YR18

Rear tires

P255/40YR18

Seating capacity

5

Transmission

Automatic

2021 BMW M340 FAQ

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