WARNING: This page is about a different car, the 2011 BMW M3, 2010 BMW M3, 2009 BMW M3, and 2008 BMW M3. However, it is still accessible from the selected car via links, so may be relevant.
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Fig 1: Identifying Adapter (135270)
Courtesy of BMW OF NORTH AMERICA, INC.
Consisting of:
1 = 0491311 Adapter
NOTE:
(Adapter hose)
2 = 0491312 Adapter
NOTE:
(Adapter) For connecting the DIS pressure sensor