just opend my z4 to find a black box stuck in the middle of it! it has 4 wires from it solderd to the pins from the ecu plug,1st wire (red) goes to pin 131, 2nd wire (black) goes to pin 121, 3rd wire (green) goes to pin da300, 4th wire (yellow) also goes to pin da300 this pin has been (cut) the green wire is solderd ecu side and yellow plug side! think it is proberbly fuel cut defender but not sure, anyone know..cheers.

 

anyone had this? cheers