Selling my OEM hifi 676 amp. Came out of my E92 M3 but I believe it fits all E92 3 series. You can double check the part number to be sure.
I also have Technics PNP add a sub harness 676. The harness did have one of the wires come loose and I soldered it back in place. I also added a wire connector to the remote turn on wire.
$80 or best offer for everything shipped.
Willing to sell separate also. You can also buy them separately. $50 for the amp and $30 for the harness since it's used and repaired by me and not technic himself.