connector view
| Pin | Type | Description /Signal type | Connection /Measuring notes |
|---|---|---|---|
| 1 | A | Signal, central bass + | Subwoofer, right |
| 2 | A | Signal, front right mid-range speaker + | Mid-range speaker, front right |
| 3 | A | Signal, front left mid-range speaker + | Mid-range speaker, front left |
| 4 | A | Signal, central bass + | Subwoofer, left |
| 5 | M | Signal, central bass - | Subwoofer, right |
| 6 | M | Signal, front right mid-range speaker - | Mid-range speaker, front right |
| 7 | M | Signal, front left mid-range speaker - | Mid-range speaker, front left |
| 8 | M | Signal, central bass - | Subwoofer, left |
| 9 | A/E | Signal, CAN-bus | CAN-bus connector |
| 10 | E | Signal, SIM card | Telephone transceiver |
| 11 | A/E | Signal, CAN-bus | CAN-bus connector |
| 12 | M | Ground | Ground point |
| 13 | A | Aerial switching signal | Connector X13887 |
| 14 | E | Signal, locator lighting | Connector, dimmed instrument lighting |
| 15 | E | Supply, terminal 30 | Fuse F40 |
| 16 | Not used |
Installing aftermarket Android head unit on a standard E90 BMW need to provide 12 Volts to the antenna sw pin 13 on the BMW harness.
12 pin connector
| Pin | Type | Description /Signal type | Connection /Measuring notes |
|---|---|---|---|
| 2 | E | AF signal | AV socket, rear compartment |
| 7 | E | AF signal | AV socket, rear compartment |
| 8 | M | Shield | AV socket, rear compartment |
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