My 1983 Newell recently found out the hard way that air bags last about 25 years - luckily it happened while sitting in storage (after returning from a trip). When checking on my bus, I found it leaning to one side. I soon discovered that one of the rear bags was leaking. The rubber wall was quite badly decayed showing the cords underneath. As I checked the other bags, I found they "only" had bad cracking; however, I obviously replaced them all. If you're curious, they cost me about $125 each.
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