The BMW X5 is a mid-size crossover SUV sold by BMW since 1999. It features all-wheel drive and is available with a range of gasoline inline-6s and V8 engines. Diesels are an option for models sold outside of North America. All X5s worldwide are manufactured in Spartanburg, South Carolina. BMW described it as a SAV (Sport Activity Vehicle) rather than an SUV (Sport Utility Vehicle), to emphasize its on-road ability despite its size. Like the Lexus RX 300 and Mercedes M-Class, the X5 heralded the shift from truck-based body-on-frame SUVs to sedan-based crossovers that would come to fruition in the late 2000s.

4 years later, the BMW X3 was released, which used the "X" prefix applied to the BMW SUVs which were derivatives of the BMW number-series models.