SmartRide's air spring for the rear of the 2007-2013 BMW X5 is a rugged aftermarket replacement air spring that will affordably replace your leaking air spring. The SmartRide air spring provides a smooth, comfortable, ride and offers an exact fit for quick installation. This spring is made with a durable rubber air bladder and impact resistant plastic top and bottom mounts and comes with a new air line fitting. SmartRide's economical air springs provide O.E. like form, fit and function and are designed for years of trouble free driving.