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BMW 3 Series E46 1998–2006 (M54) → MaxxECU MaxxECU STREET REV9+ (auto)

BMW 3 Series E46 1998–2006 (M54) — MaxxECU — MaxxECU STREET
⚠ NOT CHECKED. Don't build from this.
Drawn by Michael Gnankou · Rev 0 · draft · 2026-10-11

Before you start

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.

Statusdraft · not yet verified: nobody has reported building and running this harness
Open errors5: read the Findings page before cutting any wire
Size of the job55 wires · 11 connectors · 1 part lines
ToolsCrimp and extraction tools for each terminal family (see Connectors) · wire strippers · multimeter · heat gun + heat-shrink
Order of work1. Check every part against the parts list. 2. Cut and label every wire (labels: Export → Wire labels). 3. Crimp and pin connector by connector, ticking the build checklist. 4. Run the bench test with nothing plugged in and the battery disconnected. 5. Only then connect the ECU and power up.

Build checklist

Tick each box as you go. Continuity: meter from end to end, expect under 1 Ω.

WireFromToGaugeColourCutLabelCrimp ACrimp BPin APin BContinuity
W1OEM-X60001-8SP-14V-10.85☐☐☐☐☐☐☐
W2OEM-X60001-9SP-14V-10.85☐☐☐☐☐☐☐
W3SP-14V-1MAXXECUSTREE-C1-M40.85☐☐☐☐☐☐☐
W4OEM-X60001-4SP-GND-10.85☐☐☐☐☐☐☐
W5OEM-X60001-5SP-GND-10.85☐☐☐☐☐☐☐
W6OEM-X60001-6SP-GND-10.85☐☐☐☐☐☐☐
W7OEM-X60005-5SP-GND-10.85☐☐☐☐☐☐☐
W8SP-GND-1MAXXECUSTREE-C1-L40.85☐☐☐☐☐☐☐
W9OEM-X60002-20SP-0V-10.5☐☐☐☐☐☐☐
W10OEM-X60002-21SP-0V-10.5☐☐☐☐☐☐☐
W11OEM-X60002-22SP-0V-10.5☐☐☐☐☐☐☐
W12OEM-X60002-24SP-0V-10.5☐☐☐☐☐☐☐
W13OEM-X60003-15SP-0V-10.5☐☐☐☐☐☐☐
W14OEM-X60003-17SP-0V-10.5☐☐☐☐☐☐☐
W15OEM-X60003-18SP-0V-10.5☐☐☐☐☐☐☐
W16OEM-X60003-20SP-0V-10.5☐☐☐☐☐☐☐
W17OEM-X60003-21SP-0V-10.5☐☐☐☐☐☐☐
W18OEM-X60003-23SP-0V-10.5☐☐☐☐☐☐☐
W19OEM-X60003-25SP-0V-10.5☐☐☐☐☐☐☐
W20OEM-X60003-28SP-0V-10.5☐☐☐☐☐☐☐
W21OEM-X60004-12SP-0V-10.5☐☐☐☐☐☐☐
W22OEM-X60004-7SP-0V-10.5☐☐☐☐☐☐☐
W23SP-0V-1MAXXECUSTREE-C1-H10.5☐☐☐☐☐☐☐
W24SP-0V-1MAXXECUSTREE-C1-H20.5☐☐☐☐☐☐☐
W25OEM-X60003-7SP-5V1-10.5☐☐☐☐☐☐☐
W26OEM-X60004-14SP-5V1-10.5☐☐☐☐☐☐☐
W27OEM-X60004-9SP-5V1-10.5☐☐☐☐☐☐☐
W28SP-5V1-1MAXXECUSTREE-C1-G10.5☐☐☐☐☐☐☐
W29OEM-X60003-8MAXXECUSTREE-C1-H30.5☐☐☐☐☐☐☐
W30OEM-X60003-2MAXXECUSTREE-C1-H40.5☐☐☐☐☐☐☐
W31OEM-X60005-3MAXXECUSTREE-C1-A20.5☐☐☐☐☐☐☐
W32OEM-X60005-2MAXXECUSTREE-C1-A30.5☐☐☐☐☐☐☐
W33OEM-X60005-1MAXXECUSTREE-C1-B20.5☐☐☐☐☐☐☐
W34OEM-X60005-9MAXXECUSTREE-C1-B30.5☐☐☐☐☐☐☐
W35OEM-X60005-8MAXXECUSTREE-C1-C20.5☐☐☐☐☐☐☐
W36OEM-X60005-7MAXXECUSTREE-C1-C30.5☐☐☐☐☐☐☐
W37OEM-X60003-33MAXXECUSTREE-C1-K10.5☐☐☐☐☐☐☐
W38OEM-X60003-34MAXXECUSTREE-C1-K20.5☐☐☐☐☐☐☐
W39OEM-X60003-35MAXXECUSTREE-C1-M10.5☐☐☐☐☐☐☐
W40OEM-X60003-36MAXXECUSTREE-C1-M20.5☐☐☐☐☐☐☐
W41OEM-X60003-37MAXXECUSTREE-C1-M30.5☐☐☐☐☐☐☐
W42OEM-X60003-38MAXXECUSTREE-C1-L30.5☐☐☐☐☐☐☐
W43OEM-X60003-48SP-SHD-10.5☐☐☐☐☐☐☐
W44SP-SHD-1MAXXECUSTREE-C1-E30.5☐☐☐☐☐☐☐
W45OEM-X60001-1MAXXECUSTREE-C1-B40.5☐☐☐☐☐☐☐
W46OEM-X60002-23MAXXECUSTREE-C1-C40.5☐☐☐☐☐☐☐
W47OEM-X60004-10MAXXECUSTREE-C1-D40.5☐☐☐☐☐☐☐
W48OEM-X60002-1MAXXECUSTREE-C1-D10.5☐☐☐☐☐☐☐
W49OEM-X60002-13MAXXECUSTREE-C1-A40.5☐☐☐☐☐☐☐
W50OEM-X60003-1MAXXECUSTREE-C1-J30.5☐☐☐☐☐☐☐
W51OEM-X60003-19MAXXECUSTREE-C1-G20.5☐☐☐☐☐☐☐
W52OEM-X60004-8MAXXECUSTREE-C1-J40.5☐☐☐☐☐☐☐
W53OEM-X60003-24MAXXECUSTREE-C1-J10.5☐☐☐☐☐☐☐
W54OEM-X60003-22MAXXECUSTREE-C1-J20.5☐☐☐☐☐☐☐
W55OEM-X60003-27MAXXECUSTREE-C1-F10.5☐☐☐☐☐☐☐

Bench test (before first power-up)

Battery disconnected, ECU and every sensor unplugged. Meter on resistance. Each pair below must read open (OL): a reading means a pinched wire, a stray strand or a mis-pinned cavity. Then check continuity of every wire (last column of the build checklist).

#Probe AProbe BExpectWhyReading
1MAXXECUSTREE-C1-M4MAXXECUSTREE-C1-H1open (OL)+12 V supply must not touch sensor ground
2MAXXECUSTREE-C1-H1MAXXECUSTREE-C1-G1open (OL)sensor ground must not touch 5 V sensor reference
3MAXXECUSTREE-C1-L4MAXXECUSTREE-C1-G1open (OL)power ground must not touch 5 V sensor reference
4MAXXECUSTREE-C1-L4MAXXECUSTREE-C1-M4open (OL)power ground must not touch +12 V supply
5MAXXECUSTREE-C1-M4MAXXECUSTREE-C1-G1open (OL)+12 V supply must not touch 5 V sensor reference

If any reading doesn't match, stop and get help before powering up.

Revisions

RevLabelByDate
No revisions yet.

Schematic

MAXXECUSTREE-C1OEM-X60001OEM-X60002OEM-X60003OEM-X60004OEM-X60005SP-0VSP-14VSP-5V1SP-GNDSP-SHD

Connectors

MAXXECUSTREE-C1

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
A2IGN 1—W31—0.5OEM-X60005-3———
A3IGN 2—W32—0.5OEM-X60005-2———
A4GPO 8/TACHO—W49—0.5OEM-X60002-13———
B2IGN 3—W33—0.5OEM-X60005-1———
B3IGN 4—W34—0.5OEM-X60005-9———
B4GPO 1—W45—0.5OEM-X60001-1———
C2IGN 5—W35—0.5OEM-X60005-8———
C3IGN 6—W36—0.5OEM-X60005-7———
C4GPO 2—W46—0.5OEM-X60002-23———
D1WBO2 Heater-—W48—0.5OEM-X60002-1———
D4GPO 3—W47—0.5OEM-X60004-10———
E1CAN H————————
E2CAN L————————
E3GND Shield—W44—0.5SP-SHD-1———
F1CLT—W55—0.5OEM-X60003-27———
F2IAT————————
F3WBO2 VREF————————
F4WBO2 VS————————
G1+5V sensor supply—W28—0.5SP-5V1-1———
G2TPS/AIN—W51—0.5OEM-X60003-19———
G3WBO2 IP————————
G4WBO2 RCAL————————
H1Sensor GND—W23—0.5SP-0V-1———
H2Trigger GND—W24—0.5SP-0V-1———
H3TRIGGER—W29—0.5OEM-X60003-8———
H4HOME—W30—0.5OEM-X60003-2———
J1AIN 1 (temperature)—W53—0.5OEM-X60003-24———
J2AIN 2 (Temperature)—W54—0.5OEM-X60003-22———
J3AIN 3 (0-5V)—W50—0.5OEM-X60003-1———
J4AIN 4 (0-5V)—W52—0.5OEM-X60004-8———
K1INJ 1—W37—0.5OEM-X60003-33———
K2INJ 2—W38—0.5OEM-X60003-34———
K3DIN 1————————
K4DIN 2————————
L3INJ 6—W42—0.5OEM-X60003-38———
L4Engine GND—W8—0.85SP-GND-1———
M1INJ 3—W39—0.5OEM-X60003-35———
M2INJ 4—W40—0.5OEM-X60003-36———
M3INJ 5—W41—0.5OEM-X60003-37———
M4+12V ECU power supply—W3—0.85SP-14V-1———

OEM-X60001

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Injector/unloader relay control (terminal 15)—W45—0.5MAXXECUSTREE-C1-B4———
4Power ground—W4—0.85SP-GND-1———
5Power ground—W5—0.85SP-GND-1———
6Power ground—W6—0.85SP-GND-1———
7Battery constant (terminal 30)————————
8ECU main power (terminal 87 via main relay)—W1—0.85SP-14V-1———
9Voltage supply (injector / fuse carrier)—W2—0.85SP-14V-1———

OEM-X60002

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1O2 sensor heater, bank 1 pre-cat—W48—0.5MAXXECUSTREE-C1-D1———
13O2 sensor heater, bank 2 pre-cat—W49—0.5MAXXECUSTREE-C1-A4———
14O2 sensor signal, bank 1 pre-cat————————
15O2 sensor signal, bank 2 pre-cat————————
16O2 sensor signal, bank 1 post-cat————————
18O2 sensor signal, bank 2 post-cat————————
19O2 sensor heater, bank 2 post-cat————————
20O2 sensor ground, bank 1 pre-cat—W9—0.5SP-0V-1———
21O2 sensor ground, bank 2 pre-cat—W10—0.5SP-0V-1———
22O2 sensor ground, bank 1 post-cat—W11—0.5SP-0V-1———
23Main relay control—W46—0.5MAXXECUSTREE-C1-C4———
24O2 sensor ground, bank 2 post-cat—W12—0.5SP-0V-1———
7O2 sensor heater, bank 1 post-cat————————

OEM-X60003

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Mass air flow (MAF) signal—W50—0.5MAXXECUSTREE-C1-J3———
10Throttle position sensor 2————————
15Exhaust camshaft ground—W13—0.5SP-0V-1———
17MAF ground—W14—0.5SP-0V-1———
18Intake camshaft ground—W15—0.5SP-0V-1———
19Throttle position sensor 1—W51—0.5MAXXECUSTREE-C1-G2———
2Exhaust camshaft position—W30—0.5MAXXECUSTREE-C1-H4———
20Throttle ground—W16—0.5SP-0V-1———
21Crankshaft ground—W17—0.5SP-0V-1———
22Intake air temperature (IAT)—W54—0.5MAXXECUSTREE-C1-J2———
23IAT ground—W18—0.5SP-0V-1———
24Engine coolant temperature (ECT)—W53—0.5MAXXECUSTREE-C1-J1———
25ECT ground—W19—0.5SP-0V-1———
27Engine oil temperature—W55—0.5MAXXECUSTREE-C1-F1———
28Oil temperature ground—W20—0.5SP-0V-1———
29Knock sensor, cylinders 1-3 (A)————————
30Knock sensor, cylinders 1-3 (B)————————
31Knock sensor, cylinders 4-6 (A)————————
32Knock sensor, cylinders 4-6 (B)————————
33Injector cylinder 1—W37—0.5MAXXECUSTREE-C1-K1———
34Injector cylinder 2—W38—0.5MAXXECUSTREE-C1-K2———
35Injector cylinder 3—W39—0.5MAXXECUSTREE-C1-M1———
36Injector cylinder 4—W40—0.5MAXXECUSTREE-C1-M2———
37Injector cylinder 5—W41—0.5MAXXECUSTREE-C1-M3———
38Injector cylinder 6—W42—0.5MAXXECUSTREE-C1-L3———
40VANOS intake solenoid————————
41VANOS exhaust solenoid————————
42Evap purge valve————————
43Throttle motor drive 1 (H-bridge)————————
44Throttle motor drive 2 (H-bridge)————————
45Map-controlled thermostat————————
46Idle speed control, close————————
47Idle speed control, open————————
48Knock sensor shield—W43—0.5SP-SHD-1———
49DISA intake flap————————
5Intake camshaft position————————
7Throttle body +5V supply—W25—0.5SP-5V1-1———
8Crankshaft position—W29—0.5MAXXECUSTREE-C1-H3———

OEM-X60004

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
10Fuel pump relay control—W47—0.5MAXXECUSTREE-C1-D4———
12Pedal ground 2—W21—0.5SP-0V-1———
13Pedal position signal 2————————
14Pedal +5V supply 2—W26—0.5SP-5V1-1———
7Pedal ground 1—W22—0.5SP-0V-1———
8Pedal position signal 1—W52—0.5MAXXECUSTREE-C1-J4———
9Pedal +5V supply 1—W27—0.5SP-5V1-1———

OEM-X60005

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Ignition coil 3—W33—0.5MAXXECUSTREE-C1-B2———
2Ignition coil 2—W32—0.5MAXXECUSTREE-C1-A3———
3Ignition coil 1—W31—0.5MAXXECUSTREE-C1-A2———
5Ignition ground—W7—0.85SP-GND-1———
7Ignition coil 6—W36—0.5MAXXECUSTREE-C1-C3———
8Ignition coil 5—W35—0.5MAXXECUSTREE-C1-C2———
9Ignition coil 4—W34—0.5MAXXECUSTREE-C1-B3———

SP-0V

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W9—0.5OEM-X60002-20———
1——W10—0.5OEM-X60002-21———
1——W11—0.5OEM-X60002-22———
1——W12—0.5OEM-X60002-24———
1——W13—0.5OEM-X60003-15———
1——W14—0.5OEM-X60003-17———
1——W15—0.5OEM-X60003-18———
1——W16—0.5OEM-X60003-20———
1——W17—0.5OEM-X60003-21———
1——W18—0.5OEM-X60003-23———
1——W19—0.5OEM-X60003-25———
1——W20—0.5OEM-X60003-28———
1——W21—0.5OEM-X60004-12———
1——W22—0.5OEM-X60004-7———
1——W23—0.5MAXXECUSTREE-C1-H1———
1——W24—0.5MAXXECUSTREE-C1-H2———

SP-14V

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W1—0.85OEM-X60001-8———
1——W2—0.85OEM-X60001-9———
1——W3—0.85MAXXECUSTREE-C1-M4———

SP-5V1

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W25—0.5OEM-X60003-7———
1——W26—0.5OEM-X60004-14———
1——W27—0.5OEM-X60004-9———
1——W28—0.5MAXXECUSTREE-C1-G1———

SP-GND

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W4—0.85OEM-X60001-4———
1——W5—0.85OEM-X60001-5———
1——W6—0.85OEM-X60001-6———
1——W7—0.85OEM-X60005-5———
1——W8—0.85MAXXECUSTREE-C1-L4———

SP-SHD

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W43—0.5OEM-X60003-48———
1——W44—0.5MAXXECUSTREE-C1-E3———

Pin map

OEM pointOEM functionOEM familyTarget pointTarget functionTarget familyWire colourEvidence
OEM-X60001-1Injector/unloader relay control (terminal 15)low_side_outMAXXECUSTREE-C1-B4GPO 1low_side_outcorroborated
OEM-X60001-4Power groundgroundMAXXECUSTREE-C1-L4Engine GNDgroundcorroborated
OEM-X60001-5Power groundgroundMAXXECUSTREE-C1-L4Engine GNDgroundcorroborated
OEM-X60001-6Power groundgroundMAXXECUSTREE-C1-L4Engine GNDgroundcorroborated
OEM-X60001-7Battery constant (terminal 30)power_in———corroborated
OEM-X60001-8ECU main power (terminal 87 via main relay)power_inMAXXECUSTREE-C1-M4+12V ECU power supplypower_incorroborated
OEM-X60001-9Voltage supply (injector / fuse carrier)power_inMAXXECUSTREE-C1-M4+12V ECU power supplypower_incorroborated
OEM-X60002-1O2 sensor heater, bank 1 pre-catlow_side_outMAXXECUSTREE-C1-D1WBO2 Heater-low_side_outcorroborated
OEM-X60002-13O2 sensor heater, bank 2 pre-catlow_side_outMAXXECUSTREE-C1-A4GPO 8/TACHOlow_side_outcorroborated
OEM-X60002-14O2 sensor signal, bank 1 pre-catlambda_nb_in———corroborated
OEM-X60002-15O2 sensor signal, bank 2 pre-catlambda_nb_in———corroborated
OEM-X60002-16O2 sensor signal, bank 1 post-catlambda_nb_in———corroborated
OEM-X60002-18O2 sensor signal, bank 2 post-catlambda_nb_in———corroborated
OEM-X60002-19O2 sensor heater, bank 2 post-catlow_side_out———corroborated
OEM-X60002-20O2 sensor ground, bank 1 pre-catsensor_groundMAXXECUSTREE-C1-H1 + MAXXECUSTREE-C1-H2Sensor GND + Trigger GNDsensor_groundcorroborated
OEM-X60002-21O2 sensor ground, bank 2 pre-catsensor_groundMAXXECUSTREE-C1-H1 + MAXXECUSTREE-C1-H2Sensor GND + Trigger GNDsensor_groundcorroborated
OEM-X60002-22O2 sensor ground, bank 1 post-catsensor_groundMAXXECUSTREE-C1-H1 + MAXXECUSTREE-C1-H2Sensor GND + Trigger GNDsensor_groundcorroborated
OEM-X60002-23Main relay controllow_side_outMAXXECUSTREE-C1-C4GPO 2low_side_outcorroborated
OEM-X60002-24O2 sensor ground, bank 2 post-catsensor_groundMAXXECUSTREE-C1-H1 + MAXXECUSTREE-C1-H2Sensor GND + Trigger GNDsensor_groundcorroborated
OEM-X60002-7O2 sensor heater, bank 1 post-catlow_side_out———corroborated
OEM-X60003-1Mass air flow (MAF) signalanalog_inMAXXECUSTREE-C1-J3AIN 3 (0-5V)analog_incorroborated
OEM-X60003-10Throttle position sensor 2analog_in———corroborated
OEM-X60003-15Exhaust camshaft groundsensor_groundMAXXECUSTREE-C1-H1 + MAXXECUSTREE-C1-H2Sensor GND + Trigger GNDsensor_groundcorroborated
OEM-X60003-17MAF groundsensor_groundMAXXECUSTREE-C1-H1 + MAXXECUSTREE-C1-H2Sensor GND + Trigger GNDsensor_groundcorroborated
OEM-X60003-18Intake camshaft groundsensor_groundMAXXECUSTREE-C1-H1 + MAXXECUSTREE-C1-H2Sensor GND + Trigger GNDsensor_groundcorroborated
OEM-X60003-19Throttle position sensor 1analog_inMAXXECUSTREE-C1-G2TPS/AINanalog_incorroborated
OEM-X60003-2Exhaust camshaft positiontrigger_inMAXXECUSTREE-C1-H4HOMEtrigger_incorroborated
OEM-X60003-20Throttle groundsensor_groundMAXXECUSTREE-C1-H1 + MAXXECUSTREE-C1-H2Sensor GND + Trigger GNDsensor_groundcorroborated
OEM-X60003-21Crankshaft groundsensor_groundMAXXECUSTREE-C1-H1 + MAXXECUSTREE-C1-H2Sensor GND + Trigger GNDsensor_groundcorroborated
OEM-X60003-22Intake air temperature (IAT)temp_inMAXXECUSTREE-C1-J2AIN 2 (Temperature)temp_incorroborated
OEM-X60003-23IAT groundsensor_groundMAXXECUSTREE-C1-H1 + MAXXECUSTREE-C1-H2Sensor GND + Trigger GNDsensor_groundcorroborated
OEM-X60003-24Engine coolant temperature (ECT)temp_inMAXXECUSTREE-C1-J1AIN 1 (temperature)temp_incorroborated
OEM-X60003-25ECT groundsensor_groundMAXXECUSTREE-C1-H1 + MAXXECUSTREE-C1-H2Sensor GND + Trigger GNDsensor_groundcorroborated
OEM-X60003-27Engine oil temperaturetemp_inMAXXECUSTREE-C1-F1CLTtemp_incorroborated
OEM-X60003-28Oil temperature groundsensor_groundMAXXECUSTREE-C1-H1 + MAXXECUSTREE-C1-H2Sensor GND + Trigger GNDsensor_groundcorroborated
OEM-X60003-29Knock sensor, cylinders 1-3 (A)knock_in———corroborated
OEM-X60003-30Knock sensor, cylinders 1-3 (B)knock_in———corroborated
OEM-X60003-31Knock sensor, cylinders 4-6 (A)knock_in———corroborated
OEM-X60003-32Knock sensor, cylinders 4-6 (B)knock_in———corroborated
OEM-X60003-33Injector cylinder 1injector_outMAXXECUSTREE-C1-K1INJ 1injector_outcorroborated
OEM-X60003-34Injector cylinder 2injector_outMAXXECUSTREE-C1-K2INJ 2injector_outcorroborated
OEM-X60003-35Injector cylinder 3injector_outMAXXECUSTREE-C1-M1INJ 3injector_outcorroborated
OEM-X60003-36Injector cylinder 4injector_outMAXXECUSTREE-C1-M2INJ 4injector_outcorroborated
OEM-X60003-37Injector cylinder 5injector_outMAXXECUSTREE-C1-M3INJ 5injector_outcorroborated
OEM-X60003-38Injector cylinder 6injector_outMAXXECUSTREE-C1-L3INJ 6injector_outcorroborated
OEM-X60003-40VANOS intake solenoidlow_side_out———corroborated
OEM-X60003-41VANOS exhaust solenoidlow_side_out———corroborated
OEM-X60003-42Evap purge valvelow_side_out———corroborated
OEM-X60003-43Throttle motor drive 1 (H-bridge)hbridge_out———corroborated
OEM-X60003-44Throttle motor drive 2 (H-bridge)hbridge_out———corroborated
OEM-X60003-45Map-controlled thermostatlow_side_out———corroborated
OEM-X60003-46Idle speed control, closehbridge_out———corroborated
OEM-X60003-47Idle speed control, openhbridge_out———corroborated
OEM-X60003-48Knock sensor shieldshieldMAXXECUSTREE-C1-E3GND Shieldshieldcorroborated
OEM-X60003-49DISA intake flaplow_side_out———corroborated
OEM-X60003-5Intake camshaft positiontrigger_in———corroborated
OEM-X60003-7Throttle body +5V supplyvrefMAXXECUSTREE-C1-G1+5V sensor supplyvrefcorroborated
OEM-X60003-8Crankshaft positiontrigger_inMAXXECUSTREE-C1-H3TRIGGERtrigger_incorroborated
OEM-X60004-10Fuel pump relay controllow_side_outMAXXECUSTREE-C1-D4GPO 3low_side_outcorroborated
OEM-X60004-12Pedal ground 2sensor_groundMAXXECUSTREE-C1-H1 + MAXXECUSTREE-C1-H2Sensor GND + Trigger GNDsensor_groundcorroborated
OEM-X60004-13Pedal position signal 2analog_in———corroborated
OEM-X60004-14Pedal +5V supply 2vrefMAXXECUSTREE-C1-G1+5V sensor supplyvrefcorroborated
OEM-X60004-7Pedal ground 1sensor_groundMAXXECUSTREE-C1-H1 + MAXXECUSTREE-C1-H2Sensor GND + Trigger GNDsensor_groundcorroborated
OEM-X60004-8Pedal position signal 1analog_inMAXXECUSTREE-C1-J4AIN 4 (0-5V)analog_incorroborated
OEM-X60004-9Pedal +5V supply 1vrefMAXXECUSTREE-C1-G1+5V sensor supplyvrefcorroborated
OEM-X60005-1Ignition coil 3ignition_outMAXXECUSTREE-C1-B2IGN 3ignition_outcorroborated
OEM-X60005-2Ignition coil 2ignition_outMAXXECUSTREE-C1-A3IGN 2ignition_outcorroborated
OEM-X60005-3Ignition coil 1ignition_outMAXXECUSTREE-C1-A2IGN 1ignition_outcorroborated
OEM-X60005-5Ignition groundgroundMAXXECUSTREE-C1-L4Engine GNDgroundcorroborated
OEM-X60005-7Ignition coil 6ignition_outMAXXECUSTREE-C1-C3IGN 6ignition_outcorroborated
OEM-X60005-8Ignition coil 5ignition_outMAXXECUSTREE-C1-C2IGN 5ignition_outcorroborated
OEM-X60005-9Ignition coil 4ignition_outMAXXECUSTREE-C1-B3IGN 4ignition_outcorroborated

Cut list

WireFromToGauge (mm²)ColourLengthSignalIdent
W1OEM-X60001-8SP-14V-10.85no routeECU main power (terminal 87 via main relay)—
W2OEM-X60001-9SP-14V-10.85no routeVoltage supply (injector / fuse carrier)—
W3SP-14V-1MAXXECUSTREE-C1-M40.85no route+12V ECU power supply—
W4OEM-X60001-4SP-GND-10.85no routePower ground—
W5OEM-X60001-5SP-GND-10.85no routePower ground—
W6OEM-X60001-6SP-GND-10.85no routePower ground—
W7OEM-X60005-5SP-GND-10.85no routeIgnition ground—
W8SP-GND-1MAXXECUSTREE-C1-L40.85no routeEngine GND—
W9OEM-X60002-20SP-0V-10.5no routeO2 sensor ground, bank 1 pre-cat—
W10OEM-X60002-21SP-0V-10.5no routeO2 sensor ground, bank 2 pre-cat—
W11OEM-X60002-22SP-0V-10.5no routeO2 sensor ground, bank 1 post-cat—
W12OEM-X60002-24SP-0V-10.5no routeO2 sensor ground, bank 2 post-cat—
W13OEM-X60003-15SP-0V-10.5no routeExhaust camshaft ground—
W14OEM-X60003-17SP-0V-10.5no routeMAF ground—
W15OEM-X60003-18SP-0V-10.5no routeIntake camshaft ground—
W16OEM-X60003-20SP-0V-10.5no routeThrottle ground—
W17OEM-X60003-21SP-0V-10.5no routeCrankshaft ground—
W18OEM-X60003-23SP-0V-10.5no routeIAT ground—
W19OEM-X60003-25SP-0V-10.5no routeECT ground—
W20OEM-X60003-28SP-0V-10.5no routeOil temperature ground—
W21OEM-X60004-12SP-0V-10.5no routePedal ground 2—
W22OEM-X60004-7SP-0V-10.5no routePedal ground 1—
W23SP-0V-1MAXXECUSTREE-C1-H10.5no routeSensor GND—
W24SP-0V-1MAXXECUSTREE-C1-H20.5no routeTrigger GND—
W25OEM-X60003-7SP-5V1-10.5no routeThrottle body +5V supply—
W26OEM-X60004-14SP-5V1-10.5no routePedal +5V supply 2—
W27OEM-X60004-9SP-5V1-10.5no routePedal +5V supply 1—
W28SP-5V1-1MAXXECUSTREE-C1-G10.5no route+5V sensor supply—
W29OEM-X60003-8MAXXECUSTREE-C1-H30.5no routeCrankshaft position—
W30OEM-X60003-2MAXXECUSTREE-C1-H40.5no routeExhaust camshaft position—
W31OEM-X60005-3MAXXECUSTREE-C1-A20.5no routeIgnition coil 1—
W32OEM-X60005-2MAXXECUSTREE-C1-A30.5no routeIgnition coil 2—
W33OEM-X60005-1MAXXECUSTREE-C1-B20.5no routeIgnition coil 3—
W34OEM-X60005-9MAXXECUSTREE-C1-B30.5no routeIgnition coil 4—
W35OEM-X60005-8MAXXECUSTREE-C1-C20.5no routeIgnition coil 5—
W36OEM-X60005-7MAXXECUSTREE-C1-C30.5no routeIgnition coil 6—
W37OEM-X60003-33MAXXECUSTREE-C1-K10.5no routeInjector cylinder 1—
W38OEM-X60003-34MAXXECUSTREE-C1-K20.5no routeInjector cylinder 2—
W39OEM-X60003-35MAXXECUSTREE-C1-M10.5no routeInjector cylinder 3—
W40OEM-X60003-36MAXXECUSTREE-C1-M20.5no routeInjector cylinder 4—
W41OEM-X60003-37MAXXECUSTREE-C1-M30.5no routeInjector cylinder 5—
W42OEM-X60003-38MAXXECUSTREE-C1-L30.5no routeInjector cylinder 6—
W43OEM-X60003-48SP-SHD-10.5no routeKnock sensor shield—
W44SP-SHD-1MAXXECUSTREE-C1-E30.5no routeGND Shield—
W45OEM-X60001-1MAXXECUSTREE-C1-B40.5no routeInjector/unloader relay control (terminal 15)—
W46OEM-X60002-23MAXXECUSTREE-C1-C40.5no routeMain relay control—
W47OEM-X60004-10MAXXECUSTREE-C1-D40.5no routeFuel pump relay control—
W48OEM-X60002-1MAXXECUSTREE-C1-D10.5no routeO2 sensor heater, bank 1 pre-cat—
W49OEM-X60002-13MAXXECUSTREE-C1-A40.5no routeO2 sensor heater, bank 2 pre-cat—
W50OEM-X60003-1MAXXECUSTREE-C1-J30.5no routeMass air flow (MAF) signal—
W51OEM-X60003-19MAXXECUSTREE-C1-G20.5no routeThrottle position sensor 1—
W52OEM-X60004-8MAXXECUSTREE-C1-J40.5no routePedal position signal 1—
W53OEM-X60003-24MAXXECUSTREE-C1-J10.5no routeEngine coolant temperature (ECT)—
W54OEM-X60003-22MAXXECUSTREE-C1-J20.5no routeIntake air temperature (IAT)—
W55OEM-X60003-27MAXXECUSTREE-C1-F10.5no routeEngine oil temperature—

Bill of materials

CategoryPart numberManufacturerDescriptionQtyUnit
connectorBMW-E46-MS43-CONNBMWE46 DME (MS43) harness connector1.000ea

ECU setup sheet

RoleEngine refEngine signalSensorECU pointECU functionECU classSetup flag
No configured channels.

Findings

Open (6)

SeverityCodeSubjectMessage
errorREQUIRED_UNMAPPEDOEM-X60003-10Required OEM function "Throttle position sensor 2" (analog_in) is not connected to the new ECU.
errorREQUIRED_UNMAPPEDOEM-X60003-43Required OEM function "Throttle motor drive 1 (H-bridge)" (hbridge_out) is not connected to the new ECU.
errorREQUIRED_UNMAPPEDOEM-X60003-44Required OEM function "Throttle motor drive 2 (H-bridge)" (hbridge_out) is not connected to the new ECU.
errorREQUIRED_UNMAPPEDOEM-X60003-5Required OEM function "Intake camshaft position" (trigger_in) is not connected to the new ECU.
errorREQUIRED_UNMAPPEDOEM-X60004-13Required OEM function "Pedal position signal 2" (analog_in) is not connected to the new ECU.
infoUNMAPPEDOEM17 optional OEM pins are not mapped: OEM-X60002-14 O2 sensor signal, bank 1 pre-cat; OEM-X60002-15 O2 sensor signal, bank 2 pre-cat; OEM-X60002-16 O2 sensor signal, bank 1 post-cat; OEM-X60002-18 O2 sensor signal, bank 2 post-cat; OEM-X60002-19 O2 sensor heater, bank 2 post-cat; OEM-X60002-7 O2 sensor heater, bank 1 post-cat; OEM-X60003-29 Knock sensor, cylinders 1-3 (A); OEM-X60003-30 Knock sensor, cylinders 1-3 (B); OEM-X60003-31 Knock sensor, cylinders 4-6 (A); OEM-X60003-32 Knock sensor, cylinders 4-6 (B); OEM-X60003-40 VANOS intake solenoid; OEM-X60003-41 VANOS exhaust solenoid; OEM-X60003-42 Evap purge valve; OEM-X60003-45 Map-controlled thermostat; OEM-X60003-46 Idle speed control, close; OEM-X60003-47 Idle speed control, open; OEM-X60003-49 DISA intake flap

Accepted (1)

CodeSubjectReasonBy
REQUIRED_UNMAPPEDOEM-X60001-7Battery-constant (memory) feed of the stock ECU: the new ECU has no such input, so it is not needed.mapping-proposal

Notes

Fit check: needs add-on. Resolve these before building: - No drive-by-wire; needs a cable-throttle conversion or an external DBW controller - Needs CAN (E46 K-bus/CAN); not documented for this ECU - No knock input; the stock knock sensor would be unused - This car has EWS 3.3 (rolling code) immobilizer; needs a delete/bypass Auto-mapped by auto_map() from the library pin data on 2026-10-11. Review every wire against both manuals before building. Open items: - OEM-X60003 5: Intake camshaft position: no free cam_hall/cam_vr/frequency_in input on MaxxECU MaxxECU STREET - OEM-X60003 43: Throttle motor drive 1 (H-bridge): no free hbridge on MaxxECU MaxxECU STREET - OEM-X60003 44: Throttle motor drive 2 (H-bridge): no free hbridge on MaxxECU MaxxECU STREET - OEM-X60003 10: Throttle position sensor 2: no free tps/analog_0_5 on MaxxECU MaxxECU STREET - OEM-X60004 13: Pedal position signal 2: no free tps/analog_0_5 on MaxxECU MaxxECU STREET Not wired: - OEM-X60001 7: Battery constant (terminal 30): MaxxECU MaxxECU STREET has no battery-constant input; not needed - OEM-X60003 29: Knock sensor, cylinders 1-3 (A): no free knock input on MaxxECU MaxxECU STREET - OEM-X60003 30: Knock sensor, cylinders 1-3 (B): no free knock input on MaxxECU MaxxECU STREET - OEM-X60003 31: Knock sensor, cylinders 4-6 (A): no free knock input on MaxxECU MaxxECU STREET - OEM-X60003 32: Knock sensor, cylinders 4-6 (B): no free knock input on MaxxECU MaxxECU STREET - OEM-X60003 46: Idle speed control, close: no free hbridge on MaxxECU MaxxECU STREET - OEM-X60003 47: Idle speed control, open: no free hbridge on MaxxECU MaxxECU STREET - OEM-X60002 19: O2 sensor heater, bank 2 post-cat: no free heater_low_side/low_side/ls_hs/hbridge on MaxxECU MaxxECU STREET - OEM-X60002 7: O2 sensor heater, bank 1 post-cat: no free heater_low_side/low_side/ls_hs/hbridge on MaxxECU MaxxECU STREET - OEM-X60003 40: VANOS intake solenoid: no free low_side/ls_hs/injector/hbridge on MaxxECU MaxxECU STREET - OEM-X60003 41: VANOS exhaust solenoid: no free low_side/ls_hs/injector/hbridge on MaxxECU MaxxECU STREET - OEM-X60003 42: Evap purge valve: no free low_side/ls_hs/injector/hbridge on MaxxECU MaxxECU STREET - OEM-X60003 45: Map-controlled thermostat: no free low_side/ls_hs/injector/hbridge on MaxxECU MaxxECU STREET - OEM-X60003 49: DISA intake flap: no free low_side/ls_hs/injector/hbridge on MaxxECU MaxxECU STREET - OEM-X60002 14: O2 sensor signal, bank 1 pre-cat: no free o2_narrowband/analog_0_5 on MaxxECU MaxxECU STREET - OEM-X60002 15: O2 sensor signal, bank 2 pre-cat: no free o2_narrowband/analog_0_5 on MaxxECU MaxxECU STREET - OEM-X60002 16: O2 sensor signal, bank 1 post-cat: no free o2_narrowband/analog_0_5 on MaxxECU MaxxECU STREET - OEM-X60002 18: O2 sensor signal, bank 2 post-cat: no free o2_narrowband/analog_0_5 on MaxxECU MaxxECU STREET

Sources

ReliabilityKindTitleURLArchiveCapturedSHA-256
4vendor_docMaxxECU GEN1 pinout (MINI / STREET / SPORT / V1 / RACE / PRO)http://www.maxxecu.com/webhelp/wirings-maxxecu_pinout.htmlarchive2026-10-052e37b6814690
2community_copyms4x.net: Siemens MS43 Pinouthttps://www.ms4x.net/index.php?title=Siemens_MS43_Pinout———
2community_copyrusefi wiki: 2002 BMW 325 / 2004 BMW 330Ci E46 DME pinout (M54/MS43)https://github.com/rusefi/rusefi/wiki/2002-BMW-325-and-2004-BMW-330Ci-E46-DME-pinout———