Had it done in 2005 by BSW, (when they still did installs) in my 2001 X5, which I had just bought. They are still doing great today, just powered now by an Alpine vs the old crap it came with.

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Mark _______________________________
2001 X5 4.4i topaz blue/sand Sport, complete Dinan S2 , hitch, V1, tint, BSW Stage 1, Alpine INA-W910BT
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Life is not fair!
You can't protect people from their own stupidity!
Laughter makes life worth living