WARNING: This page is about a different car, the 2013 BMW 550i GT, 2012 BMW 550i GT, 2011 BMW 550i GT, and 2010 BMW 550i GT. However, it is still accessible from the selected car via links, so may be relevant.
0493780 000223 Side wall MW
Fig 1: Identifying Side Wall (0493780)
Courtesy of BMW OF NORTH AMERICA, INC.
NOTE:
(side wall) Right side wall. Only required once for constructing the basic frame Discontinued, only available via complete tool [Not available separately]