Just bought a 98 328i, with 62k.  I'm not sure if/when the plugs were replaced.  So, I pulled one of the 6 and saw it is a NGK - BKR6EQUP.  It looks like a platinum +4, with 4 arms, and a white post.   When I look at the picture of the new NGK, with exact same part number, it is a laser post with one arm.  Does anyone know why the same NGK part # plugs look different?