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?