2023 BMW M340i xDrive Sedan

The M340i is BMW's performance-oriented 3 Series variant. It's a real driver's car, equipped with a turbocharged 6-cylinder engine (382 hp) and special M Sport suspension, brakes, and differential. The exterior's design is sporty, with unique M cosmetic features. More important, the M340i is great fun to drive. Its turbo 6 delivers plenty of power, and the 8-speed transmission shifts quickly and smoothly. The steering is nicely weighted, handling is sharp, and the brakes are strong, with good feedback. The 340i's fuel-economy ratings are respectable, at 26 mpg combined. Cabin materials are upscale, with excellent fit and finish. But our reviewers were divided on the complex infotainment system, which relies more on a touch screen than on physical knobs and buttons to regulate audio and heating/cooling functions. The ride from M340i's adaptive suspension—especially on uneven pavement—may be too firm and unsettled for some. Overall, cabin space is tight, and a cramped back seat makes getting in and out difficult. More concerning, forward-collision warning and automatic emergency braking are the only standard ADAS features; others are available only in extra-cost packages. Speaking of which, nearly $11,000 of our test vehicle's $68,470 price tag was for optional features, including an extra $1,350 for a package with heated front seats and steering wheel, power lumbar adjustment for the driver's seat, and head-up display. Really.