Removing the wiring harness section for the sensor system of cylinders 1 to 4

WARNING: Car may slip off the vehicle hoist where components are supported .
Danger! Immobilization period-threatening injuries!

Secure the vehicle hoist against lowering and lifting.
Make sure that the vehicle does not lift off the mounting plates on the vehicle lift.

WARNING: Car may slip off the vehicle hoist if the weight is distributed unevenly .
Danger! Immobilization period-threatening injuries!

Ensure there is a specific weight compensation on the car.

WARNING: Vehicle may slip off the vehicle hoist if the vehicle hoist is handled incorrectly .
Danger! Immobilization period-threatening injuries!

Observe safety instructions on raising the vehicle using a vehicle hoist.
For additional information see: 00... RAISE THE VEHICLE USING A VEHICLE LIFT .

NOTE: TECHNICAL INFORMATION
After a brake pad exchange and before pressing the brake pedal: It is imperative to apply the electromechanical parking brake.
If this is not observed, a CC message appears and the brake system switches to the emergency program. The brake booster is no longer active.

Preliminary work

Refer to DISCONNECTING ALL BATTERY GROUND LEADS .
Refer to BRINGING FRONT COMPARTMENT LID IN THE SERVICE POSITION .
Refer to REMOVING THE COVER OF THE ENGINE COMPARTMENT AT THE REAR LEFT .
Refer to REMOVING THE COVER OF THE REAR RIGHT ENGINE COMPARTMENT .
Refer to REMOVING REAR HOOD SEAL .
Refer to REMOVING LEFT AND RIGHT WIPER ARM .
Refer to REMOVING THE COWL COVER .
Refer to REMOVING THE CENTER COWL UPPER PART .
Refer to REMOVING THE TOP RIGHT AND LEFT COVER IN THE ENGINE COMPARTMENT .
Refer to REMOVING SEAL FOR FRONT HOOD .
Refer to REMOVING THE STRUT BRACE AT THE LEFT AND RIGHT .
Refer to REMOVING UPPER CROSS CONNECTION .
Refer to REMOVING THE TENSION STRUT AT THE SHOCK TOWER ON THE LEFT AND RIGHT .
Refer to REMOVING THE REAR TOP CROSS CONNECTION .
Refer to RELEASING THE RIGHT FRONT SPRING STRUT (AIR SUSPENSION) .
Refer to REMOVING THE FRONT LEFT AND RIGHT WHEELS .
Refer to REMOVING THE COVER OF THE STEERING ASSEMBLY ON THE LEFT AND RIGHT .
Refer to PARTIALLY REMOVING THE FRONT LEFT AND RIGHT WHEEL ARCH TRIM (DOOR SILL) .
Refer to REMOVING THE REAR SECTION OF THE WHEEL ARCH COVER ON THE FRONT LEFT AND RIGHT .
Refer to REMOVING THE FRONT UNDERBODY PROTECTION .
Refer to REMOVING THE STIFFENING PLATE .
Refer to REMOVING THE LEFT UNFILTERED-AIR DUCT .
Refer to REMOVING FAN COWL .
Refer to DRAINING THE COOLANT FOR THE LOW-TEMPERATURE COOLANT CIRCUIT .
Refer to PARTIALLY RELEASING THE RIGHT CHARGE AIR LINE .
Refer to REMOVING RIGHT CLEAN AIR PIPE .
Refer to REMOVING RIGHT CHARGE AIR COOLER .
Refer to INSTALLING THE REAR TOP CROSS CONNECTION .
Refer to MOVE THE ENGINE TO THE INSTALLATION POSITION .
Refer to REMOVING STIFFENING STRUT .
Refer to REMOVING FRONT WHEEL ARCH COVER AT THE BOTTOM LEFT AND RIGHT .
Refer to REMOVING CRASH LEVERS LEFT AND RIGHT .
Refer to REMOVING LEFT AND RIGHT BRAKE VENTILATION DUCT .
Refer to IF INSTALLED: REMOVING THE AUXILIARY HEATER .
Refer to REMOVING THE EPS WIRING HARNESS .
Refer to RELEASING THE WIRING HARNESS FROM THE ACTIVE STABILIZER .
Refer to RELEASING UNIVERSAL JOINT ON STEERING GEAR .
Refer to RELEASING THE LEFT AND RIGHT OUTPUT SHAFT FROM THE WHEEL BEARING .
Refer to DETACHING THE TOP LEFT AND RIGHT WISHBONE FROM THE SWIVEL BEARING .
Refer to FASTENING THE SWIVEL BEARING ON THE LEFT AND RIGHT .
Refer to DISCONNECTING THE CONNECTOR FROM VERTICAL ACCELERATION SENSOR ON THE LEFT AND RIGHT .
Refer to DISCONNECTING THE PLUG CONNECTIONS ON THE LEFT AND THE RIGHT .
Refer to LOOSENING AND TYING UP BRAKE CALIPER, LEFT AND RIGHT .
Refer to REMOVING THE SPRING STRUT HOLDER ON LEFT AND RIGHT .
Refer to REMOVING LEFT AND RIGHT OUTPUT SHAFT: .
Refer to RELEASING THE BRACKET OF THE TRANSMISSION OIL COOLING .
Refer to DISCONNECTING THE COOLANT HOSE FROM THE FRONT SUBFRAME .
Refer to PREPARING THE MOBILE TABLE LIFT .
Refer to POSITIONING THE MOBILE TABLE LIFT .
Refer to LOOSENING THE SWIVEL BEARING ON THE LEFT AND RIGHT .
Refer to UNSCREW THE BOLTS ON THE FRONT AXLE SUPPORT .
Refer to REMOVING FRONT AXLE .
Refer to REMOVING COVER FOR THE RIGHT DME CONTROL UNIT .
Refer to REMOVING THE RIGHT UNFILTERED-AIR DUCT .
Refer to REMOVING THE RIGHT INTAKE PLENUM .

Wiring harness section for the sensor system of cylinders 1 to 4

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock the locks (1) .

Courtesy of BMW OF NORTH AMERICA, INC.
Feed out and remove the cover (1) in arrow direction from the holder (2) of DME control unit cylinders 1 to 4.

Courtesy of BMW OF NORTH AMERICA, INC.
Detach all cables (1) from the DME control unit holder.

Courtesy of BMW OF NORTH AMERICA, INC.
Remove the connector (1) from the DME control unit of cylinders 5 to 8.
Unlock the connector (2) from the power distribution module and disconnect it.
Unlock and disconnect connector (3) .
Unlock and disconnect connector (4) .

Courtesy of BMW OF NORTH AMERICA, INC.
Unlock and disconnect the plug connection (1) from the hot film air mass meter.
Unlock and disconnect the plug connection (2) at the high pressure pump.
Unlock and disconnect the plug connection (3) from the camshaft position sensor.
Unlock and disconnect the plug connection (4) from the camshaft position sensor.
Loosen screws (5) .

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Unlock and disconnect the plug connection (6) from the oxygen sensor monitor.
Unlock and disconnect the plug connection (7) from the pressure sensor.
Unlock and disconnect the plug connection (8) at the tank vent valve.
Unlock and disconnect the plug connection (9) from the Lambda oxygen sensor.
Unlock and disconnect the plug connection (1) from the rail pressure sensor.
Unlock and disconnect the plug connection (2) from the pressure sensor.

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Unlock and disconnect the plug connection (1) at the auxiliary coolant pump.
Unlock and disconnect the plug connection (2) at the throttle valve of cylinders 1 to 4.
Unlock and disconnect the plug connection (3) at the boost pressure sensor.
Unlock and disconnect the plug connection (4) on the VANOS solenoid valve of the intake side.
Unlock and disconnect the plug connection (5) on the VANOS solenoid valve of the exhaust side.
Unlock and disconnect the plug connection (6) at the coolant thermostat.

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Unlock plug connection (7) and disconnect.
Unlock and disconnect the plug connection (8) at the coolant temperature sensor.
Loosen screws (1) .
Unlock plug connection (2) and disconnect.
Unlock and disconnect the plug connection (3) from the knock sensors of the cylinders 1 to 4.
Unlock and disconnect the plug connection (4) at the solenoid valve.
Unlock and disconnect the plug connection (5) at the oil pressure sensor.
Unlock and disconnect the plug connection (6) at the oil-level sensor.

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Unlock and disconnect the plug connection (7) at the crankshaft sensor.
Unlock and disconnect the plug connection (1) from the exhaust turbocharger.
Unlock and disconnect the plug connection (2) on the alternator.
Release, thread out and remove the wiring harness section for the sensor system of cylinders 1 to 4 from the clamps.

Courtesy of BMW OF NORTH AMERICA, INC.