[bikestuff]

Gang,

About a year ago, I had Newell replace the rear air bags on my coach (2003 model).  In August of 2014 I was back at Newell for some other work and we realized that one / both airbags were leaking.  Replaced again.

Fast forward to Jan 2015...I am at Newell and bags are leaking again.

They have now been replace again, but I am wondering what is causing the failures.

Symptoms:
1) There is no obvious damage to the air bags.
2) On one of the failed airbags and possibly on all of the failed ones, there is a metal support piece (imagine the inside of a donut) that came loose.  I will append pics of that piece, but in the goodyear diagram (attached) it is the piece that holds the bottom of the airbag to the coach.
3) Air seems to be coming from bottom of bag, not from fittings.

Here are my questions:

1)  The number on the bags old / new is 1R11-066.  Is this familiar to anyone with a 2000 vintage coach?
2)  Has anyone just had bags start leaking for no reason?  (No checking, no holes, etc)
3)  What could cause a bag to leak around the top / bottom?
4) My shocks have never been replaced (on back) 220k miles...could bad shocks contribute to airbag demise?

Thanks!

bill