The BMW X1 is a line of subcompact luxury crossover SUV produced by BMW. Debuted in 2009, the first-generation X1 has been based on the E90 3 Series and offers rear-wheel drive layout as standard. At its introduction, it was positioned as the smallest SUV in BMW line-up below the X3, aiming a wider range of customers due to its smaller size, increased efficiency, and a lower price tag due to the all-wheel drive layout (xDrive) being optional.