Originally Posted by joegoodrich

Okay, I am getting ready to replace my radio module. My X5 is a 00 and has a BM C43 with round pins.

I'm going to replace it with the BM53 that has flat pins and is coded for my nav.

I have included 2 pics -- 1 old and 1 of the new unit. What do I need for adapaters to convert round to flat?

On the old unit there are two plugs that look like antenna plugs separate from the main harness. Which is which. I assume one is for the radio antenna and one is for the nav antenna.