Hello, I installed a Android 2DIN Head unit to replace the ageing Business CD and after a few weeks radio reception went. I suspected the cheap chinese Fakra/ISO connector so respliced it, then tried an adapter and finally purchased another connector but no difference. I bench tested head unit with a coax but still nothing so suspect unit is defective.

Just so I am clear when dealing with seller - I reinstalled my original H/U and radio is just fine. Could there be any issue with the Antenna or diversity amp (which I am aware can fail) which might work ok with the BMW unit but not aftermarket? Any way of testing those 2 components? thx

2003 X5 E53 3.0d