Thanks OP, doing the same and ordered some NGK - ILZFR6D11 for my 2007 3.0 with 52K. For some reason it says ILZFR6D11 for 2007 and PLZFR6A-11S for 2008+ with same engine?!?!? Plugs are probably pretty worn down by now. I have a E53 as well and hope its just as simple DIY with the E70.