12 14 611 Replace the left knock sensor(s) (M550i xDrive 2018-2019)

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: RAISE THE VEHICLE USING A VEHICLE LIFT .

NOTE: TECHNICAL INFORMATION
When installing the knock sensors, the tightening torque must be observed.
Non-compliance with the tightening torque can lead to malfunction.

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 ON LEFT AND RIGHT IN THE ENGINE COMPARTMENT AT THE TOP .
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 THE WHEEL .
Refer to REMOVING THE REAR SECTION OF THE FRONT WHEEL ARCH COVER FRONT .
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 STIFFENING PLATE .
Refer to REMOVING THE REINFORCEMENT STRUT FROM THE ENGINE MOUNT 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: REMOVE THE SILENCER OF THE STATIONARY HEATING (ADDITIONAL WORK FRU NO.: 31 11 905) .
Refer to LOOSENING THE ANTI-ROLL BAR LINK ON THE LEFT AND RIGHT FROM THE ANTI-ROLL BAR .
Refer to RELEASING THE LEFT AND RIGHT OUTPUT SHAFT FROM THE WHEEL BEARING .
Refer to RELEASING THE BRAKE HOSE AT THE FRONT LEFT AND RIGHT .
Refer to REMOVING THE COVER OF THE STEERING ASSEMBLY ON THE LEFT AND RIGHT .
Refer to IF INSTALLED: DISCONNECT THE PLUG CONNECTIONS OF THE ACTIVE STABILIZER .
Refer to REMOVE UNIVERSAL JOINT .
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 TOP LEFT AND RIGHT WISHBONE FROM THE SWIVEL BEARING .
Refer to RELEASING THE RIGHT AND LEFT SPRING STRUT HOLDER FROM THE BOTTOM WISHBONE .
Refer to UNSCREWING THE BOLTS ON THE FRONT AXLE SUPPORT .
Refer to LOWERING FRONT AXLE SUPPORT .
Refer to REMOVING THE LEFT ENGINE SUPPORT BRACKET .

Follow-up work

Refer to INSTALLING THE LEFT ENGINE SUPPORT BRACKET .
Refer to RAISING FRONT AXLE SUPPORT .
Refer to TIGHTENING THE BOLTS ON THE FRONT AXLE SUPPORT .
Refer to FASTENING THE SPRING STRUT HOLDER ON THE LEFT AND RIGHT TO THE WISHBONE BELOW .
Refer to SECURING THE WISHBONE ON THE TOP LEFT AND RIGHT ON THE SWIVEL BEARING .
Refer to REMOVING THE MOBILE LIFTING TABLE .
Refer to ATTACHING COOLANT HOSES TO FRONT SUBFRAME .
Refer to ATTACHING THE THERMOSTAT OR TRANSMISSION OIL COOLER LINE ON THE FRONT SUBFRAME .
Refer to INSTALLING THE UNIVERSAL JOINT .
Refer to ATTACHING THE UNIVERSAL JOINT TO STEERING GEAR .
Refer to IF INSTALLED: CONNECT THE CONNECTOR OF THE ACTIVE STABILIZER .
Refer to INSTALLING THE COVER OF THE STEERING ASSEMBLY ON THE LEFT AND RIGHT .
Refer to SECURING BRAKE HOSE, FRONT RIGHT AND LEFT .
Refer to SECURING THE RIGHT AND LEFT OUTPUT SHAFTS ON THE WHEEL BEARING .
Refer to SECURING THE ANTI-ROLL BAR LINK ON THE LEFT AND RIGHT TO THE ANTI-ROLL BAR .
Refer to IF INSTALLED: INSTALL THE SILENCER OF THE STATIONARY HEATING (ADDITIONAL WORK FRU NO.: 31 11 905) .
Refer to INSTALLING THE WHEEL ARCH COVER ON THE FRONT LEFT AND BOTTOM RIGHT .
Refer to INSTALLING LEFT AND RIGHT BRAKE VENTILATION DUCT .
Refer to SECURING THE WIRING HARNESS FOR THE EPS ON THE FRONT AXLE SUPPORT .
Refer to INSTALLING THE REINFORCEMENT STRUT ON THE ENGINE MOUNT ON THE LEFT AND RIGHT .
Refer to INSTALLING THE THRUST FIELD .
Refer to INSTALLING THE UNDERBODY PROTECTION OF THE STEERING GEAR OR THE FRONT THRUST FIELD .
Refer to INSTALLING THE FRONT UNDERBODY PROTECTION OR FRONT THRUST FIELD .
Refer to REMOVING THE SECURING TOOL OF THE ENGINE IN INSTALLATION POSITION .
Refer to INSTALLING THE REAR SECTION OF THE FRONT WHEEL ARCH COVER .
Refer to MOUNTING THE WHEEL .
Refer to INSTALLING THE MOUNT OF THE HOOD SEAL .
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 COVER ON THE LEFT AND RIGHT IN THE ENGINE COMPARTMENT AT THE TOP .
Refer to TAKING HOOD OUT OF THE SERVICE POSITION .
Refer to INSTALLING ACOUSTIC COVER .
Refer to CONNECTING NEGATIVE BATTERY CABLE .
Refer to RESETTING THE TIRE PRESSURE MONITOR .