12-1060 Tool
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.
0491113 121060 Tool MW
NOTE:
(Tool) For adjusting the dynamic ignition timing adjustment - Discontinuation from July 92 [Discontinued]