I vaguely remember that is where the hook for an engine hoist threads in. might be wrong though, is it in the engine block or the oil filter housing?
there should be another one toward the back of the engine. might be under the plastic cover.
Past: 2001 330i ZSP/ZPP/Step
Past: 2004 S60R 6MT Sport
Past: 2007 335i 6MT ZSP/ZCW/322/655
Past: 2010 335xi ZMP/ZCW/ZPP/PPK/PE
Past: 2013 335i 6MT ZMM/ZDH/ZTP/3AG/494/508
Present: 2016 F34 335i xDrive ZCW/ZDA/ZDH/ZTP/ZMP/2V5/5DL
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Last edited by Orient330iNYC; 01-08-2014 at 12:37 PM.