Not confident with automotive wiring? Have a professional harness builder or tuner do it, or check your work before first power-up. A wiring mistake can damage the ECU, the engine or the car, or start a fire.
Components
| Ref | Kind | Part | Exclude from BOM |
|---|---|---|---|
| MAIN-R | connector | ||
| NEW-BATT | terminal | ||
| NEW-KEYON | terminal | ||
| OEM-X60001 | connector | ||
| OEM-X60002 | connector | ||
| OEM-X60003 | connector | ||
| OEM-X60004 | connector | ||
| OEM-X60005 | connector | ||
| SP-0V | splice | ||
| SP-14V | splice | ||
| SP-5V1 | splice | ||
| SP-GND | splice | ||
| SPEEDUINO-A | connector | ||
| SPEEDUINO-PWR | connector |
Create part
Cut list
Lengths need a layout (0 of 55 routed).
| Wire | From / To | Gauge | Signal |
|---|---|---|---|
| W1 | OEM-X60001-8 / SP-14V-1 | 0.85 | ECU main power (terminal 87 via main relay) |
| W2 | OEM-X60001-9 / SP-14V-1 | 0.85 | Voltage supply (injector / fuse carrier) |
| W3 | NEW-KEYON-1 / MAIN-R-COIL+ | 0.5 | Relay coil positive (ignition-switched +12V) |
| W4 | NEW-BATT-1 / MAIN-R-IN | 0.85 | Relay contact input (battery + via main fuse) |
| W5 | MAIN-R-COIL- / SP-GND-1 | 0.5 | Relay coil negative (ECU low-side driver) |
| W6 | MAIN-R-OUT / SPEEDUINO-PWR-12V | 0.85 | Relay contact output (switched +12V bus) |
| W7 | OEM-X60001-4 / SP-GND-1 | 0.85 | Power ground |
| W8 | OEM-X60001-5 / SP-GND-1 | 0.85 | Power ground |
| W9 | OEM-X60001-6 / SP-GND-1 | 0.85 | Power ground |
| W10 | OEM-X60005-5 / SP-GND-1 | 0.85 | Ignition ground |
| W11 | SP-GND-1 / SPEEDUINO-A-10 | 0.85 | Ground |
| W12 | SP-GND-1 / SPEEDUINO-A-9 | 0.85 | Ground |
| W13 | OEM-X60002-20 / SP-0V-1 | 0.5 | O2 sensor ground, bank 1 pre-cat |
| W14 | OEM-X60002-21 / SP-0V-1 | 0.5 | O2 sensor ground, bank 2 pre-cat |
| W15 | OEM-X60002-22 / SP-0V-1 | 0.5 | O2 sensor ground, bank 1 post-cat |
| W16 | OEM-X60002-24 / SP-0V-1 | 0.5 | O2 sensor ground, bank 2 post-cat |
| W17 | OEM-X60003-15 / SP-0V-1 | 0.5 | Exhaust camshaft ground |
| W18 | OEM-X60003-17 / SP-0V-1 | 0.5 | MAF ground |
| W19 | OEM-X60003-18 / SP-0V-1 | 0.5 | Intake camshaft ground |
| W20 | OEM-X60003-20 / SP-0V-1 | 0.5 | Throttle ground |
| W21 | OEM-X60003-21 / SP-0V-1 | 0.5 | Crankshaft ground |
| W22 | OEM-X60003-23 / SP-0V-1 | 0.5 | IAT ground |
| W23 | OEM-X60003-25 / SP-0V-1 | 0.5 | ECT ground |
| W24 | OEM-X60003-28 / SP-0V-1 | 0.5 | Oil temperature ground |
| W25 | OEM-X60004-12 / SP-0V-1 | 0.5 | Pedal ground 2 |
| W26 | OEM-X60004-7 / SP-0V-1 | 0.5 | Pedal ground 1 |
| W27 | SP-0V-1 / SPEEDUINO-A-12 | 0.5 | Ground |
| W28 | SP-0V-1 / SPEEDUINO-A-23 | 0.5 | Ground |
| W29 | OEM-X60003-7 / SP-5V1-1 | 0.5 | Throttle body +5V supply |
| W30 | OEM-X60004-14 / SP-5V1-1 | 0.5 | Pedal +5V supply 2 |
| W31 | OEM-X60004-9 / SP-5V1-1 | 0.5 | Pedal +5V supply 1 |
| W32 | SP-5V1-1 / SPEEDUINO-A-13 | 0.5 | 5V |
| W33 | OEM-X60003-8 / SPEEDUINO-A-25 | 0.5 | Crankshaft position |
| W34 | OEM-X60003-2 / SPEEDUINO-A-24 | 0.5 | Exhaust camshaft position |
| W35 | OEM-X60003-5 / SPEEDUINO-A-26 | 0.5 | Intake camshaft position |
| W36 | OEM-X60005-3 / SPEEDUINO-A-7 | 0.5 | Ignition coil 1 |
| W37 | OEM-X60005-2 / SPEEDUINO-A-34 | 0.5 | Ignition coil 2 |
| W38 | OEM-X60005-1 / SPEEDUINO-A-33 | 0.5 | Ignition coil 3 |
| W39 | OEM-X60005-9 / SPEEDUINO-A-8 | 0.5 | Ignition coil 4 |
| W40 | OEM-X60003-33 / SPEEDUINO-A-1 | 0.5 | Injector cylinder 1 |
| W41 | OEM-X60003-34 / SPEEDUINO-A-2 | 0.5 | Injector cylinder 2 |
| W42 | OEM-X60003-35 / SPEEDUINO-A-3 | 0.5 | Injector cylinder 3 |
| W43 | OEM-X60003-36 / SPEEDUINO-A-5 | 0.5 | Injector cylinder 4 |
| W44 | OEM-X60003-37 / SPEEDUINO-A-1 | 0.5 | Injector cylinder 5 |
| W45 | OEM-X60003-38 / SPEEDUINO-A-2 | 0.5 | Injector cylinder 6 |
| W46 | OEM-X60003-19 / SPEEDUINO-A-22 | 0.5 | Throttle position sensor 1 |
| W47 | OEM-X60003-24 / SPEEDUINO-A-19 | 0.5 | Engine coolant temperature (ECT) |
| W48 | OEM-X60001-1 / SPEEDUINO-A-16 | 0.5 | Injector/unloader relay control (terminal 15) |
| W49 | OEM-X60002-23 / SPEEDUINO-A-15 | 0.5 | Main relay control |
| W50 | OEM-X60004-10 / SPEEDUINO-A-36 | 0.5 | Fuel pump relay control |
| W51 | OEM-X60002-1 / SPEEDUINO-A-35 | 0.5 | O2 sensor heater, bank 1 pre-cat |
| W52 | OEM-X60002-13 / SPEEDUINO-A-37 | 0.5 | O2 sensor heater, bank 2 pre-cat |
| W53 | OEM-X60002-19 / SPEEDUINO-A-38 | 0.5 | O2 sensor heater, bank 2 post-cat |
| W54 | OEM-X60002-14 / SPEEDUINO-A-21 | 0.5 | O2 sensor signal, bank 1 pre-cat |
| W55 | OEM-X60003-22 / SPEEDUINO-A-20 | 0.5 | Intake air temperature (IAT) |
Bill of materials
No wire parts assigned: 55 wires need a wire part.
| Part number | Manufacturer | Description | Qty | Unit | Unit price | Buy |
|---|---|---|---|---|---|---|
| connector1 line | ||||||
| BMW-E46-MS43-CONN | BMW | E46 DME (MS43) harness connector | 1 | ea | Mouser ↗Digi-Key ↗Amazon ↗ | |