61 31 492 Replacing level switch for windscreen washer system
WARNING: This page is about a different car, the 2010 BMW X3, 2009 BMW X3, 2008 BMW X3, and 2007 BMW X3. However, it is still accessible from the selected car via links, so may be relevant.
This operation is described in:
"Replacing fluid reservoir for windscreen washer system", see 61 71 061 Replacing fluid reservoir for windshield washer system