[larryweikart]

I don't really have an answer to that question but mine decided to take a crap a little east of Kingman Az. in the mountains, at the top, where I sat for 3 days as a friend of mine finally found a replacement in Phoenix and was kind enough to bring it to me. (mine has the series 60) After it was installed we took off the air filter, behind the rear, drivers side, wheel and cut it in half to see if it was clogged up and may have caused the failure. It was clean so it must have just quit on its own. We will never know. I don't remember what it cost, but it wasn't that expensive, so I bought a spare to carry. I have over 300,000 miles on the coach now without any additional failure. I carry quite a few extra parts and those are the parts that seem to never fail.