I'm planning on installing the Aux Input kit in a '03 X5 with nav. The DIY on the front page of X5world lists the part number as 65 12 0 153 503. RealOEM lists this as a euro part for $90. Bavauto has what looks like the same cable for $40, but that part number is 82 11 0 149 391. RealOEM doesn't have that part number. Are these in fact the same?