I had to replace both of mine that were on the bottom because they were leaking. I bought mine from amazon for like 20$ each, all is well now.
2011 328i SA SULEV Black Sapphire Metallic, Dakota Beige, ZPP, Nav
Prod Date: July 1, 2010
Traded in with 90K Miles:
2007 X3 3.0si Black Sapphire Metallic, Grey Nevada, M Sport Package, Premium, Cold Weather, Navigation, and Xenon.
Prod Date: March 2, 2007