# 2019-2023 BMW X4 M40d The BMW X4 M40d represents BMW's performance-diesel take on its swoopy "Sports Activity Coupe." Powered by a 3.0-liter inline-six turbodiesel producing 326 horsepower and substantial torque, it delivers impressive acceleration (0-60 mph in under 5 seconds) with surprisingly efficient fuel economy. Reviewers praise its athletic handling, muscular diesel grunt, and premium cabin, though criticize its compromised rear headroom and polarizing coupe-like styling. The M40d sits below the full-fat X4 M but offers a compelling blend of performance and practicality. It's somewhat infamous for epitomizing BMW's controversial "SUV coupe" philosophy—prioritizing style over space. Not sold in North America due to diesel market challenges, it's ideal for European drivers wanting a sporty, fuel-efficient family hauler with genuine driving dynamics and long-distance comfort.
The X4 M40d features a robust inline-6 diesel requiring premium oil changes every 10,000 miles ($200-300). DEF fluid refills needed periodically. Potential DPF/EGR issues after warranty. Insurance runs 15-20% higher than non-M variants. Run-flat tires cost $1,200-1,500/set. Generally reliable powertrain, but expect $800-1,200 annual maintenance at BMW dealers.
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