its common. I replaced mine last summer i think. Sometime within a year. its $24/per side plus labor if you have someone else do it. All you have to do is unbolt the wiper arm and it comes right off though. Easy to do.
<span style='color:gray'><span style='font-family:Courier'>1995 e36 3 Series RIP
1999 e46 3 Series BURN IN HELL
2000 MR-S Roadster= Current</span></span>