This is great information for me, thank you

I been wondering, what parts I'll need to install the bluetooth system if I get a ULF off eBay. Because the price I quoted down here in Austalia was $1250AUD. Which is about $900US. And I know from one of the site vendors site, a new package costs about $500~600US (cant remember). True ripoff...

Just 2 questions. Are ULF modules is universal world wide. And our X's production year, does not effect which ULF module we install? right?