The BMW X5 4.8is is an all-wheel-drive luxury performance SUV produced by German automaker BMW between 2003 and 2006. It was powered by a 4.8-liter, V8 engine that produced 355 horsepower and 360 lb-ft of torque. With a sport-tuned suspension, interior upgrades, and unique exterior features, the X5 4.8is was the highest-performance model of the X5 range.