# 2018-2023 BMW X3 M40d The X3 M40d represents BMW's diesel performance variant of its compact luxury SUV, powered by a 3.0-liter turbocharged inline-six producing 326-355 horsepower (depending on model year). This potent diesel delivers impressive torque and fuel efficiency, making it particularly popular in European markets. Reviewers praise its muscular acceleration, refined handling, and exceptional real-world efficiency, often achieving 30+ mpg while delivering sports-car-like performance. The M40d bridges the gap between standard X3s and the hardcore X3 M. **Famous for:** Combining SUV practicality with diesel torque and M-Sport dynamics; unfortunately unavailable in North America due to market preferences. **Well-suited for:** European buyers seeking a versatile family hauler with serious performance credentials, long-distance touring, and those who value efficiency without sacrificing driving dynamics. Ideal for enthusiasts who prioritize torque over high-RPM thrills.
The X3 M40d features a robust inline-6 diesel with strong reliability, though it's unavailable in the U.S. Maintenance costs are premium-tier with expensive BMW dealer servicing. The diesel particulate filter may require costly replacement if driven primarily short distances. Insurance rates are moderate for a performance SUV. Parts availability is excellent in Europe but limited elsewhere.
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