X5 is a mid-size 5-door luxury SUV that is being produced from 1999. X5 could called as a successor for other models like X3 or X6 because the car was first model to be made with unibody chassis. X5 is based on a 5 series. Vehicle is pretty popular model of BMW and more than 100 thousand of units are produced annualy and the number of units made is increasing every year. Four generations were produced from the beginning of production starting from first between 2000 and 2006, second between 2007 and 2013, and the last one between 2014 and 2018.  The fourth generation model will be started to produce in 2018 or 2019. X5 M models are being produced as a high-performance of X5.