Originally Posted by Empire

even more
you're kidding right?
a rubber seal, that is in an engine bay with a widely varying temperature range, that as different levels of vacuum applied to it never goes bad? Wow.
I wonder what I was doing wrong with the handful of boosters that I've replaced. I mean, they quiet obviously wouldn't hold any sort of vacuum, and just whined, and one of them wouldn't release the pressure as it built up until it eventually ruptured.
So yes, boosters do go bad.
perhaps no where near as often as other parts, and is typically not the issue, but they do in fact go bad.