My model X is there because half of the times I wake up in the morning and go to the car for the first time my front air suspension is completely low. Once I approach the car with the key fob and get close enough to the door then I hear it air up to where it should be. For the rest of the day the suspension does maintain the level that I have preset at up. It’s only the overnight stay that causes it at times to go to super low just in the front suspension. Hopefully this is a sensor and not a major expense.