A few years ago we were entering the main gate at Maxwell AFB in Alabama. As we were going over the speed bump at the gate the left rear airbag blew. Managed to get to the fam camp and called a truck repair place in town. Got them on the base and they removed and replaced the bag in an hour. I think the price was around $300.00 including the bag. Wasn't a big job on the rear. Front looks harder.
All the other bags are fine. This was on a 4 bag Magnum chassis. My coach is now 15 years old and I don't plan on changing any of them unless they blow or leak.
Busyguy