The E39 touring drives beautifully with its air suspension system. But after a decade of enduring significant pressure changes daily, the rubber bladder can eventually fail, causing noticeable sagging in the rear of the vehicle. It also becomes awful to drive, as well as being potentially very dangerous. We offer these replacements from the best in the industry -- Bilstein. The B3 Airmatic air springs have been designed and tested to last, as well as restoring the ride and handling that the E39 is famous for.