The 2017 BMW X5 represents a significant evolution for BMW’s mid-size luxury SUV, marrying robust performance with everyday practicality. Under the hood, buyers found a refined selection of powertrains designed to balance power, efficiency, and driving dynamics. Understanding the engine options available for this year is crucial for anyone considering a used model or simply appreciating German engineering from that era.
Overview of the 2017 Model Year Lineup
For 2017, BMW offered a clear hierarchy of engines across the X5 lineup, catering to different priorities and budgets. The range was structured to provide an accessible entry point with the sDrive40i, a capable performance-oriented xDrive40i, and the outright powerful xDrive50i. This structure allowed buyers to choose between efficiency, all-weather confidence, or maximum power without venturing into the high-performance M division.
The Core Six-Cylinder: sDrive40i and xDrive40i
Both the sDrive40i and xDrive40i utilize the same 3.0-liter turbocharged inline-six engine, a powerplant renowned for its smoothness and responsiveness. This N55-derived unit produces 300 horsepower and 300 lb-ft of torque, delivering a compelling blend of acceleration and refinement. The technology packed into this relatively compact displacement includes direct injection and a valvetronic system, ensuring strong power delivery across the rev range while maintaining decent fuel economy for the class.
3.0L turbocharged inline-six engine
300 hp / 300 lb-ft of torque output
Available rear-wheel drive (sDrive) or xDrive all-wheel drive
Known for excellent balance and linear power delivery
The High-Performance Option: xDrive50i
Stepping up to the xDrive50i introduces a completely different character, shifting the focus squarely onto brute force. This variant abandons the inline-six in favor of a larger, naturally aspirated V8 engine. The result is a more aggressive soundtrack and a surge of immediate power that defines the high-performance SUV segment.
V8 Power and Driving Dynamics
The xDrive50i’s 4.4-liter twin-turbocharged V8 is a masterclass in forced induction. Producing 445 horsepower and 480 lb-ft of torque, it provides effortless acceleration that makes merging and passing second nature. The power is sent to all four wheels via the xDrive system, which BMW meticulously calibrates to send torque between the front and rear axles. This system not only enhances traction in poor weather but also contributes to a more stable and planted feel during spirited driving.
