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

Precondition

Ignition is switched off.

NOTE: RISK OF DAMAGE
Electrostatic discharge.
Damage to or destruction of electrical components.

Leave the electrical components in their original packaging until they are being installed. Only use the original packaging for returning the product. Always package removed components straight away.
Read and comply with user information on using the associated special tool 12 7 060.
Only tap the housings of electrical components. Do not tap pins or multi-pin connectors directly.
Wear electrically conductive clothing and antistatic shoes (with ESD symbol).
For additional information see: NOTES ON ESD (ELECTROSTATIC DISCHARGE) PROTECTION .

NOTE: RISK OF DAMAGE
Malfunction or failure of the DME.
Grounding points that are not screwed on may lead to malfunction or failure of the DME.

Screw all screw points of the cable ducts on again. Some of the screw points are also grounding points.

NOTE: TECHNICAL INFORMATION
If control units are disconnected, fault memory entries and functional limitations may occur.
The fault memory entries must be read out and, if necessary, deleted.

Preliminary work

Refer to DISCONNECTING ALL BATTERY GROUND LEADS .
Refer to REMOVING THE ACOUSTIC COVER .
Refer to BRINGING FRONT COMPARTMENT LID IN THE SERVICE POSITION .
Refer to REMOVING THE COVER FOR THE CENTER ENGINE COMPARTMENT .
Refer to REMOVING THE COVER OF THE REAR RIGHT ENGINE COMPARTMENT .
Refer to REMOVING THE COVER OF THE ENGINE COMPARTMENT AT THE REAR LEFT .
Refer to REMOVING THE MOUNT OF THE HOOD SEAL .
Refer to REMOVING INTAKE SILENCER HOUSING .
Refer to REMOVING BOTH FRONT-END STRUTS .
Refer to REMOVING FRONT CROSS CONNECTION (FRONT-END STRUT REMOVED) .
Refer to REMOVING THE REAR TOP CROSS CONNECTION .
Refer to REMOVING THE RIGHT UNFILTERED-AIR DUCT .
Refer to PARTIALLY RELEASING THE RIGHT CHARGE AIR LINE .
Refer to REMOVING FAN COWL .
Refer to DRAINING THE COOLANT FOR THE CHARGE AIR COOLER .
Refer to REMOVING RIGHT CHARGE AIR COOLER .
Refer to REMOVING THE RIGHT THROTTLE BODY .
Refer to REMOVING THE FRONT LEFT AND RIGHT WHEELS .
Refer to REMOVING THE REAR SECTION OF THE WHEEL ARCH COVER ON THE FRONT LEFT AND RIGHT .
Refer to MOVE THE ENGINE TO THE INSTALLATION POSITION .
Refer to REMOVING THE FRONT UNDERBODY PROTECTION OR FRONT THRUST FIELD .
Refer to REMOVING THE UNDERBODY PROTECTION OF THE STEERING GEAR AND THRUST FIELD RESPECTIVELY .
Refer to REMOVING THE CENTER UNDERBODY PROTECTION .
Refer to REMOVING THE REINFORCEMENT STRUT FROM THE ENGINE MOUNTING ON THE LEFT AND RIGHT .
Refer to DETACHING THE WIRING HARNESS OF THE EPS FROM THE FRONT AXLE SUPPORT .
Refer to REMOVING LEFT AND RIGHT BRAKE VENTILATION DUCT .
Refer to REMOVING THE WHEEL ARCH COVER ON THE FRONT LEFT AND BOTTOM RIGHT .
Refer to IF INSTALLED: REMOVING THE SILENCER OF THE STATIONARY HEATING .
Refer to LOOSENING THE ANTI-ROLL BAR LINK ON THE LEFT AND RIGHT FROM THE ANTI-ROLL BAR .
Refer to RELEASING THE FRONT LEFT AND RIGHT BRAKE CALIPERS .
Refer to DETACHING THE CABLE OF THE WHEEL RPM SENSOR ON THE LEFT AND RIGHT .
Refer to RELEASING CABLE FROM VERTICAL ACCELERATION SENSOR ON LEFT AND RIGHT .
Refer to REMOVING THE COVER OF THE STEERING ASSEMBLY ON THE LEFT AND RIGHT .
Refer to IF INSTALLED: DISCONNECTING THE PLUG CONNECTIONS OF THE ACTIVE STABILIZER .
Refer to REMOVING THE UNIVERSAL JOINT ON THE STEERING GEAR .
Refer to RELEASING THE THERMOSTAT OR TRANSMISSION OIL COOLER LINE FROM THE FRONT SUBFRAME .
Refer to DETACHING COOLANT HOSES FROM THE FRONT AXLE SUPPORT .
Refer to PREPARING THE MOBILE TABLE LIFT .
Refer to POSITIONING THE MOBILE LIFTING TABLE .
Refer to DETACHING THE UPPER WISHBONE FROM THE SWIVEL BEARING .
Refer to DETACHING THE SPRING STRUT AT THE BOTTOM OF THE WISHBONE .
Refer to RELEASING THE SCREWS ON THE LEFT AND RIGHT FRONT AXLE SUPPORT .
Refer to COMPLETELY REMOVING FRONT AXLE .
Refer to REMOVING THE RIGHT ENGINE MOUNT HOLDER .
Refer to DISCONNECTING THE PLUG CONNECTION ON THE BOOST PRESSURE SENSOR ON THE RIGHT .
Refer to RELEASING POSITIVE BATTERY CABLE .
Refer to REMOVING TRANSMISSION WIRING HARNESS .
Refer to REMOVING RIGHT INTAKE SYSTEM .

Wiring harness section for the sensor system for cylinders 1 to 4 (top)

Courtesy of BMW OF NORTH AMERICA, INC.

Overview: Wiring harness section for the sensor system for cylinders 1 to 4 (bottom)

Wiring harness section for the sensor system for cylinders 1 to 4 (bottom)

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock the locks (1) .
Remove cover (2) .

Courtesy of BMW OF NORTH AMERICA, INC.
Unlock all connectors (1) and detach from DME control unit.

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

Courtesy of BMW OF NORTH AMERICA, INC.
Loosen screws (1) .

Courtesy of BMW OF NORTH AMERICA, INC.
Unlock and detach all connectors (1) .
Unlock and disconnect the connector (2) at the pressure sensor on the intake plenum.
Unlock and detach connector (3) from rail pressure sensor.
Unlock and disconnect the connector (4) at the camshaft position sensor of the intake camshaft.
Unlock and disconnect the connector (5) at the Lambda oxygen sensor and at the monitoring oxygen sensor.
Unlock and disconnect connector (6) at the tank vent valve.
Unlock and disconnect connector (7) at the DME control unit of cylinders 1 to 4.

Courtesy of BMW OF NORTH AMERICA, INC.
Unlock and disconnect connector (1) at the camshaft position sensor of the exhaust camshaft.
Unlock and disconnect connector (2) at the high pressure pump.
Unlock and detach the connector (3) on the hot film air mass meter.
Unlock and disconnect connector (4) at the electric controller drive of the wastegate valve.
Unlock connector (5) on alternator and detach.

Courtesy of BMW OF NORTH AMERICA, INC.
Unlock and disconnect connector (1) at the auxiliary coolant pump.
Unlock and disconnect the connector (2) from the throttle valve.
Unlock and disconnect connector (3) at the pressure sensor of the charge air cooler.
Unlock and disconnect connector (4) at the intake VANOS solenoid valve.
Unlock and disconnect connector (5) at the VANOS exhaust solenoid valve.

Courtesy of BMW OF NORTH AMERICA, INC.
Unlock and disconnect connector (6) at the coolant thermostat.
Unlock and disconnect connector (7) at the coolant pump.
Unlock and disconnect connector (8) at the coolant temperature sensor.
Loosen screws (1) .

Courtesy of BMW OF NORTH AMERICA, INC.
Unlock and disconnect connector (1) at the crankshaft sensor.
Unlock and disconnect connector (2) at the solenoid valve.
Unlock and disconnect connector (3) at the oil pressure sensor.
Unlock and disconnect connector (4) at the oil level sensor.
Unlock and disconnect connector (5) at rear of knock sensor.
Unlock and disconnect connector (6) at the cable of the temperature sensor for the engine oil temperature and coolant temperature.

Courtesy of BMW OF NORTH AMERICA, INC.
Unlock and disconnect connector (7) at front of knock sensor.
Release wiring harness section for the sensor system of cylinders 1 to 4 from the clamps, feed out and remove.