Installing the engine wiring harness for the sensor system 2
WARNING: This page is about a different car, the 2025 BMW M4, 2024 BMW M4, 2023 BMW M4, 2022 BMW M4, and 2021 BMW M4. However, it is still accessible from the selected car via links, so may be relevant.
Engine wiring harness for sensor system 2
NOTE:
RISK OF DAMAGE
Improper routing of cables and wiring harnesses .
Trapped, crushed or damaged cables may cause short circuits and malfunctions .
Improper routing of cables and wiring harnesses .
Trapped, crushed or damaged cables may cause short circuits and malfunctions .
- Route all cables without abrasions, do not trap and crush.
- Feed in the engine wiring harness (1) for the sensor system 2 and install it.
- Feed in the engine wiring harness (5) for the sensor system 2 and install it.
The locks (4) must engage audibly.
- Tighten down screw (3).
TIGHTENING TORQUE SPECIFICATIONS
| Front ground cable to cylinder head | ||
|---|---|---|
| M6 | tightening torque | 8 Nm |
- Connect the connectors (2) and (1) and lock.
The connector (2) and (1) must engage audibly.
- Attach the tank vent line (2) and the coolant ventilation line (1) in the holders (arrows).
- Connect all connectors (1) and lock.
All connectors (1) must engage audibly.
- Secure clamp (arrow).
- Feed in and position auxiliary coolant pump (4).
- Feed in and position retaining bracket (3).
- Tighten nut (2).
TIGHTENING TORQUE SPECIFICATIONS
| Auxiliary coolant pump holder to cylinder head | ||
|---|---|---|
| M6 | Tightening torque | 8 Nm |
- Connect connectors (1) and lock.
The connector (1) must engage audibly.
- Feed in the engine wiring harness (2) for the sensor system 2 and install it.
The locks (arrows) must engage audibly.
- Connect all connectors (1) and lock.
All connectors (1) must engage audibly.
- Connect connectors (1) and (2) lock.
The connector (1) must engage audibly.
- Feed in the connector (1) and (2) in arrow direction at the carrier plate (3) and install it.
- Connect connectors (1) and lock.
All connectors (1) must engage audibly.
- Secure the clamps (arrows).
- Feed in the engine wiring harness (2) for the sensor system 2 and install it.
- Secure the clamps (arrows).
- Connect all connectors (1) and lock.
All connectors (1) must engage audibly.
- Secure clamp (arrow).
- Connect connectors (1) and (2) lock.
Connectors (1) and (2) must engage audibly.
- Insert and install the holder (1).
- Attach holder (1) to ball pivot (2).
- Guide in the wiring harness section (1) and install.
The locks (arrows) must engage audibly.
- Insert and install the wiring harness section (2).
The lock (1) must engage audibly.
- Connect connectors (1) and lock.
The connector (1) must engage audibly.
- Feed in the plug connection (1) in arrow direction at the holder (2) and install it.
- Tighten the screws (1).
TIGHTENING TORQUE SPECIFICATIONS
| Oxygen sensor bracket to cylinder head cover | ||
|---|---|---|
| Self-tapping screw M6 |
Tightening torque | 5.5 Nm |
- Secure the clamps (arrows).
- Connect connectors (1) and lock.
The connector (1) must engage audibly.
- Connect connectors (1) and lock.
The connector (1) must engage audibly.
- Secure clamp (arrow).
- Guide in the wiring harness section (1) and install.
The locks (arrows) must engage audibly.
- Connect the cable clip (1) with the control unit holder (2) and lock it.
The lock (arrows) must engage audibly.
- Feed in all the connectors (2) and install them.
The locks (1) must engage audibly.
- Connect all connectors (1) and lock.
All connectors (1) must engage audibly.
- Connect connectors (1) and lock.
The connectors (1) must engage audibly.
- Connect connectors (1) and lock.
All connectors (1) must engage audibly.
- Connect the connector (3) with the oxygen sensor monitor and lock it.
The connector (3) must engage audibly.
- Connect the connector (1) with the control valve (2) for the piston cooling and lock it.
The connector (1) must engage audibly.
Follow-up work
- Refer to INSTALLING THE CHARGE AIR DUCT FOR 1-3 CYLINDERS .
- Refer to INSTALLING FAN COWL .
- Refer to CONNECTING THE COOLANT LINE TO THE RADIATOR .
- Refer to INSTALLING THE RIGHT INTAKE FILTER HOUSING (FRONT-END STRUT REMOVED) .
- Refer to INSTALLING THE REAR TOP CROSS CONNECTION .
- Refer to INSTALLING UPPER CROSS CONNECTION .
- Refer to INSTALLING THE CENTER ENGINE COMPARTMENT COVER .
- Refer to INSTALLING THE FRONT HOOD SEAL .
- Refer to INSTALLING THE CLEAN AIR PIPE FOR CYLINDERS 1 TO 3 .
- Refer to INSTALLING ACOUSTIC COVER .
- Refer to INSTALLING THE COVER FOR THE DME CONTROL UNIT .
- Refer to INSTALLING THE STRUT BRACE .
- Refer to INSTALLING THE FRONT-END STRUT .
- Refer to INSTALLING CENTER BULKHEAD LOWER PART .
- Refer to INSTALLING THE CENTER COWL UPPER PART .
- Refer to INSTALLING TENSION STRUT ON SHOCK TOWER .
- Refer to INSTALLING WINDSHIELD PANEL COVER .
- Refer to INSTALLING LEFT AND RIGHT WIPER ARM .
- Refer to CONNECTING ALL BATTERY GROUND LEADS .
- Refer to INSTALLING THE REAR RIGHT ENGINE COMPARTMENT COVER .
- Refer to INSTALLING THE COVER OF THE ENGINE COMPARTMENT ON THE REAR LEFT .
- Refer to INSTALLING THE REAR HOOD SEAL .
- Refer to FILLING AND VENTING THE HIGH-TEMPERATURE COOLANT CIRCUIT .
- Refer to INSTALLING THE BOTTOM FRONT RIGHT SIDE COVER .
- Refer to INSTALLING THE STIFFENING PLATE .
- Refer to INSTALLING THE LEFT AND RIGHT FRONT UNDERSHIELD .
- Refer to INSTALLING FRONT UNDERBODY PROTECTION .
- Refer to INSTALLING THE FRONT SPOILER .