I have a BX22. About 2-3 years ago I had the same problem and posted a work around on this forum but I can't find the post. What it was, after I found My air filter strap had broke, I had an old leather belt that I could no longer wear as it had shrunk. It was about 1 1/4 inch wide. Using the old metal strap pieces as a template, I cut the belt to length, drilled mounting holes and installed it. Over 150 hours later it is still going strong. Even if Kubota came out with a recall fix I wouldn't bother as I am more than happy with the results. Moral, don't pitch those old shrunken belts.