Have you ever ridden a tourist bus? Most, if not all, coaches have air suspensions systems to give maximum comfort to passengers. An air suspension system uses an air spring (also called an air bag) to support each the body of a vehicle over each wheel-well, at least that's how it's supposed to be. It wasn't long before companies such as Citroen and most premium car manufacturers, like Rolls Royce, Mercedes-Benz, Lincoln, figured out how to use air suspension systems to their advantage. So you may find yourself driving a car with an air suspension system. Or you may be planning to install one on your vehicle. You have to be aware of the pros and cons of air suspension systems, particularly how failure of an air spring can occur. The most common cause of spring failure is damage through moisture and dry rot. Moisture builds up along or inside the spring and causes damage internally. Road debris and abrasion from contact with other components could both cause damage to the springs' bags. And then there's the usual leaks that will eventually lead to the air compressor burning out. If you're prepared to face all these problems for the sake of ultimate riding comfort, then go ahead and equip your car with an air suspension system. Just remember that should you ever need a replacement air spring, all you have to do is visit Car Stuff.