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Old 05-18-2009, 12:10 PM   #1
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Join Date: Jul 2008
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My Ride: BMW 330i
Stock Business CD - What is this cable for?

I have a 2001 330i and recently replace the stock Business CD with a 2003 Business CD that will support the Sirius radio add-on. I replaced the antenna cable in doing so, but I'm left with a cable that has no place to fit in on the new Business CD. What is this cable for (I've outlined it in blue...sorry for the bad angle)?
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Old 05-18-2009, 12:25 PM   #2
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Hard to tell from the picture what the cable goes to. Could you snap another pic? My guess the cable is the second antenna?
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Old 05-18-2009, 02:05 PM   #3
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Diversity Antenna

The older Business HUs had two antenna leads. The "extra" antenna lead you have left over is the diversity antenna which is not used on the newer 2002+ Business HUs. I just tucked it back when I replaced my older Business HU with a newer 2002+ Business HU.

2006 325ci vert
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Old 05-18-2009, 03:02 PM   #4
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Cool, I've also tucked it behind with the rest of the wiring. Radio seems to work fine. Thanks for the replies.
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