Suncore's Rear Self-Leveling Air Spring works with the high tech suspension systems found in X5 and X6 BMW models. This air spring is built to OEM specifications and allow the flap, ride height, and speed sensors to detect small changes and adjust the height of the vehicle accordingly. If your air spring is leaking, the rest of the suspension system will overwork itself trying to level out. Once your new Suncore air springs are installed you will be able to reach standard ride height and cruise over rough roads with ease. Make your BMW drive like a BMW with Suncore's Rear Air Spring Pair for BMW X5 and X6 models.