ILZFR6D11 is the NGK part number for the NGK plug found in the N52, BMW part number 12122158253
Only true for early N52s, it was ended in 03/2007 production. Your '08 328 came with the NGK PLZFR6A11S. See this realOEM page:
and order the NGK PLZFR6A11S plug.
[For others, with a post 12/2009 328 LCI can use the NGK LZFR6AP11GS plug. It appears to be coil dependent on when the 11GS plug should be used, there were 5 versions of the coil for the N52. ]