12 51 235 Remove and install/replace Module 1, sensor system engine wiring (X4 M40i 2019-2021)

WARNING: Heavy component falling down or tipping.
Danger! Immobilization period-threatening injuries!

Before lowering or removing the front axle: Securing engine to the installation position.
For additional information see: MOVING THE ENGINE TO THE INSTALLATION POSITION .

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: 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: RAISING THE VEHICLE WITH A VEHICLE LIFT .

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

Ensure specific weight compensation on the vehicle.

Preliminary work

Refer to DEACTIVATING ELECTRICAL SYSTEM .
Refer to REMOVING THE SEAL FOR THE HOOD REAR .
Refer to REMOVING THE ACOUSTIC COVER .
Refer to MOVING THE HOOD TO THE SERVICE POSITION .
Refer to REMOVING THE TOP RIGHT AND LEFT COVER IN THE ENGINE COMPARTMENT .
Refer to REMOVING MOUNT OF HOOD SEAL ON THE LEFT AND RIGHT .
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 LEFT AND RIGHT WIPER ARM .
Refer to REMOVING THE COWL COVER .
Refer to REMOVING THE FIREWALL UPPER PART .
Refer to REMOVING ACOUSTIC COVER AT REAR .
Refer to REMOVING IGNITION COILS .
Refer to REMOVING FUEL DELIVERY LINE .
Refer to REMOVING THE DME CONTROL UNIT .
Refer to REMOVING THE INTEGRATED POWER SUPPLY MODULE (PDM) .
Refer to REMOVING CONTROL UNIT BRACKET .
Refer to DETACHING THE CHARGE AIR LINE FROM THE THROTTLE BODY .
Refer to REMOVING THE FRONT LEFT AND RIGHT WHEELS .
Refer to REMOVING THE FRONT UNDERBODY PROTECTION .
Refer to REMOVING THE CENTER UNDERBODY PROTECTION .
Refer to REMOVING REAR UNDERBODY PROTECTION .
Refer to INSTALLING THE COVER PANEL FOR THE FRONT AXLE LEFT AND RIGHT .
Refer to DRAINING THE COOLANT FROM THE LOW-TEMPERATURE COOLING SYSTEM .
Refer to DRAINING THE COOLANT FOR THE HIGH-TEMPERATURE COOLANT CIRCUIT .
Refer to REMOVING TRANSMISSION OIL COOLER .
Refer to REMOVING THE INTAKE PLENUM .
Refer to BRINGING THE ENGINE TO THE INSTALLATION POSITION .
Refer to DETACHING STEERING SHAFT AT BOTTOM FROM STEERING GEAR .
Refer to RELEASING THE EPS WIRING HARNESS FROM THE ELECTROMECHANICAL STEERING GEAR .
Refer to DETACHING THE LINE CONNECTION OF THE RIDE HEIGHT SENSOR .
Refer to IF INSTALLED: DISCONNECTING THE VACUUM LINE OF THE ENGINE MOUNTS .
Refer to RELEASING THE ELECTRIC COOLANT PUMP AND COOLANT HOSES FROM THE FRONT AXLE SUPPORT .
Refer to DETACHING THE ANTI-ROLL BAR LINK FROM THE ANTI-ROLL BAR ON THE RIGHT AND LEFT .
Refer to RELEASING THE RIGHT AND LEFT TIE ROD FROM THE SWIVEL BEARING .
Refer to RELEASING THE LEFT AND RIGHT OUTPUT SHAFT FROM WHEEL BEARING .
Refer to RELEASING WISHBONE ON RIGHT AND LEFT FROM SWIVEL BEARING .
Refer to RELEASING THE TENSION STRUTS FROM THE SWIVEL BEARING ON THE LEFT AND RIGHT .
Refer to REMOVING LEFT AND RIGHT OUTPUT SHAFT .
Refer to PREPARING THE SPECIAL TOOL .
Refer to SUPPORTING THE FRONT AXLE SUPPORT .
Refer to SECURING THE FRONT AXLE SUPPORT AT THE SPECIAL TOOL .
Refer to RELEASING AND REMOVING FRONT AXLE SUPPORT .
Refer to DETACHING THE ACOUSTIC COVER FROM THE OIL SUMP .
Refer to RELEASING FRONT PROP SHAFT FROM FRONT AXLE TRANSMISSION .
Refer to REMOVING FRONT AXLE DIFFERENTIAL .

Follow-up work

Refer to INSTALLING FRONT AXLE DIFFERENTIAL .
Refer to SECURING THE JUNCTURE SHAFT IN FRONT ON THE FRONT AXLE DIFFERENTIAL .
Refer to FASTENING ACOUSTIC COVER ON THE OIL PAN .
Refer to REPLACING THE LEFT AND RIGHT RADIAL SHAFT SEAL .
Refer to INSTALLING THE FRONT AXLE SUPPORT (RAISE) AND FASTEN .
Refer to INSTALLING OUTPUT SHAFT ON LEFT AND RIGHT .
Refer to TOPPING UP/CHECKING FRONT AXLE TRANSMISSION OIL .
Refer to ATTACHING THE RIGHT AND LEFT TENSION STRUTS ON THE SWIVEL BEARING .
Refer to SECURING THE WISHBONE ON THE LEFT AND RIGHT ON THE SWIVEL BEARING .
Refer to ATTACHING THE RIGHT AND LEFT OUTPUT SHAFT ONTO THE WHEEL BEARING .
Refer to SECURING THE TIE ROD TO THE RIGHT AND LEFT ON THE SWIVEL BEARING .
Refer to SECURING THE ANTI-ROLL BAR LINK ON THE LEFT AND RIGHT ON THE ANTI-ROLL BAR .
Refer to FASTENING ELECTRIC COOLANT PUMP AND COOLANT HOSES TO THE FRONT AXLE SUPPORT .
Refer to IF INSTALLED: CONNECTING THE VACUUM LINE OF THE ENGINE MOUNTS .
Refer to ATTACHING THE LINE CONNECTION OF THE RIDE HEIGHT SENSOR .
Refer to SECURING THE EPS WIRING HARNESS TO THE ELECTROMECHANICAL STEERING GEAR .
Refer to SECURING THE STEERING SHAFT AT THE BOTTOM ON THE STEERING GEAR .
Refer to REMOVING THE COMBUSTION ENGINE FROM THE MOUNTING ORIENTATION .
Refer to CONNECTING THE COOLANT HOSE TO THE AUXILIARY COOLANT PUMP .
Refer to CONNECTING THE COOLANT LINE TO THE RADIATOR .
Refer to INSTALLING THE TRANSMISSION OIL COOLER .
Refer to INSTALLING THE INTAKE PLENUM .
Refer to FASTENING CHARGE AIR LINE TO THE THROTTLE BODY .
Refer to INSTALLING CONTROL UNIT BRACKET .
Refer to INSTALLING THE INTEGRATED POWER SUPPLY MODULE (PDM) .
Refer to INSTALLING THE DME CONTROL UNIT .
Refer to INSTALLING ACOUSTIC COVER AT REAR .
Refer to INSTALLING FUEL DELIVERY LINE .
Refer to INSTALLING THE IGNITION COILS .
Refer to INSTALLING THE COWL UPPER PART .
Refer to INSTALLING WINDSHIELD PANEL COVER .
Refer to INSTALLING LEFT AND RIGHT WIPER ARM .
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 MOUNT OF HOOD SEAL ON THE LEFT AND RIGHT .
Refer to INSTALLING THE COVER IN THE ENGINE COMPARTMENT AT TOP LEFT AND RIGHT .
Refer to ACTIVATING ELECTRICAL SYSTEM .
Refer to FILLING THE LOW-TEMPERATURE COOLING SYSTEM WITH THE VACUUM FILLING EQUIPMENT .
Refer to FILLING THE HIGH-TEMPERATURE COOLING SYSTEM WITH THE VACUUM FILLING EQUIPMENT .
Refer to VENTING THE LOW-TEMPERATURE COOLING SYSTEM .
Refer to VENTING THE HIGH-TEMPERATURE COOLANT SYSTEM .
Refer to CHECKING/TOPPING UP THE OIL LEVEL IN THE AUTOMATIC TRANSMISSION .
Refer to INSTALLING THE COVER PANELS ON THE FRONT AXLE ON THE RIGHT AND LEFT .
Refer to INSTALLING UNDERBODY PROTECTION AT REAR .
Refer to INSTALLING THE CENTER UNDERBODY PROTECTION .
Refer to INSTALLING FRONT UNDERBODY PROTECTION .
Refer to INSTALLING THE FRONT LEFT AND RIGHT WHEELS .
Refer to TAKING HOOD OUT OF THE SERVICE POSITION .
Refer to INSTALLING ACOUSTIC COVER .
Refer to INSTALLING THE REAR HOOD SEAL .