I have a grom audio Bluetooth in my e38 with dsp it works very will does phone calls and streams music. I got the cheaper one with out the iPod as I just use Bluetooth I even ran the mic all the way up front and put in behind the stock mic grill so it looks oem

__________________
-e24 m6
-e32 740/5
-e34 525it
-e83
-e83 Msport (gf)
-e30 325ix (gf)