Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSBMW2023840I XDRIVE 2D CONVERTIBLEREPAIR AND DIAGNOSISHYBRID/ELECTRIC POWERTRAINELECTRIC CONVERTERS AND CONTROLLERSGENERAL ELECTRICAL SYSTEM -- REPAIR (G14, G15, & G16)
2023 BMW 840i xDrive 2D Convertible
General Electrical System -- Repair (G14, G15, & G16)
2023 BMW 840i xDrive 2D ConvertibleSECTION General Electrical System -- Repair (G14, G15, & G16)
- 61 00 General Information
- 6100... Information on removing, connecting and changing the battery
- 6100... Notes for disconnecting and connecting the vehicle battery
- 6100... Notes on handling optical fibers
- 6100... Notes on handling the high pressure cleaner
- 6100... Notes on handling wiring harnesses and cables
- 6100... Parking-residing-driving
- 6100... Repairing airbag cables
- 6100... Safety instructions for handling vehicle battery
- 61 00 730 Programming/encoding the control unit(s) including deletion of fault memory (after vehicle test)
- 61 12 Battery Ground Lead
- 61 13 Plug Connections, Terminals
- 6113... Butt connector for repairing a plug connection
- 6113... Circular connector, 13-pin, system D2.5
- 6113... Connector housing, LCC contact (load current contact)
- 6113... Crimping Micro Power Quadlock contacts (MPQ)
- 6113... Crimping Micro Quadlock System contacts (MQS)
- 6113... Crimping of NanoMQS contacts (MQS)
- 6113... Crimping annular contacts
- 6113... Cutting, strip off insulation and crimping optical fibers
- 6113... Cutting to length and strip off insulation from cables
- 6113... In-line connectors, 24-/44-pin, Hybrid System MQS/MPQ
- 6113... Inline connectors, 6-, 8-pin, System MQS
- 6113... Inline plugs, 2-pin, System MPQ 2.8
- 6113... In-line plugs, 2-pin, System MDK 3 plus 2.8
- 6113... Inline plugs, 3-, 6-pin, System Elo-Power 2.8
- 6113... Inline plugs, 4-, 10-pin, System Elo
- 6113... Socket housings, 2x21-, 2x27-pin, Hybrid Systems MQS/MPQ, Elo/Elo Power
- 6113... Socket housing (radio connector), Hybrid System MQS/MPQ
- 6113... Socket housing 42-, 43-, 46-pin, Hybrid System MQS/MPQ
- 6113... Socket housings, 5-pin, 8-pin, System MQS/MPQ
- 6113... Special tools for wiring harness repairs
- 6113... Unlocking and disconnecting different plug connections
- 61 14 Power Distribution Box
- 61 14 010 Remove and install/replace power distribution box (trunk)
- 61 14 035 Remove & install/replace power distribution box front positive battery cable
- 61 14 040 Removing and installing/replacing rear power distribution box positive battery cable (8' series coupe models 2019-)
- 61 14 041 Removing and installing/replacing rear power distribution box positive battery cable (behind luggage compartment trim panel, right) (all 8' series coupe models 2019-)
- 61 14 040 Removing and installing/replacing rear power distribution box positive battery cable (all 8' series convertible models 2019-)
- 61 14 041 Removing and installing/replacing rear power distribution box positive battery cable (behind luggage compartment trim panel, right) (all 8' series convertible models 2019-)
- 61 14 040 Removing and installing/replacing rear power distribution box positive battery cable (all 8' series Gran Coupe sedan models 2020-)
- 61 14 041 Removing and installing/replacing rear power distribution box positive battery cable (behind luggage compartment trim panel, right) (all 8' series Gran Coupe sedan models 2020-)
- 61 20 Battery General Information
- 6120... Notes on AGM battery
- 61 20 503 Vehicle battery - closed current monitoring
- 61 20 900 Disconnecting and connecting battery ground lead
- Remove the cover of the rear right engine compartment
- Disconnecting the negative battery cable of the auxiliary battery in the engine compartment
- Remove luggage compartment floor covering
- Disconnect the battery earth lead for the active steering
- Disconnecting the negative battery cable of the system battery
- Connecting negative battery cable of the system battery
- Connect the battery earth lead for the active steering
- Install luggage compartment floor covering
- Connecting the negative battery cable of the auxiliary battery in the engine compartment
- Install the rear right engine compartment cover
- 61 20 908 Running vehicle battery "power reset"
- 61 21 Battery Replacement
- 61 21 003 Removing and installing the 12V dual storage system
- 61 21 004 Replacing the 12V dual storage system - registering with battery change -
- 61 21 006 Removing and installing 48 V battery (with holder) (840i and 840i xDrive Coupe/Convertible/Gran Coupe sedan)
- 61 21 007 Replacing 48-V battery - with registering battery replacement - (840i and 840i xDrive Coupe/Convertible/Gran Coupe sedan)
- 61 21 010 Removing and installing the vehicle battery
- 61 21 017 Replacing vehicle battery - registering with battery replacement- (all 8' series coupe and convertible models 2019-)
- 61 21 028 Charging battery
- 61 21 028 Supporting voltage of the vehicle electrical system/recharging vehicle battery
- 61 21 065 Removing and installing vehicle electrical system support battery
- 61 21 070 Replacing the vehicle electrical system support vehicle battery - including battery change registration-
- 61 21 085 Removing and installing 12 V lithium ion auxiliary battery ((all 8' series Gran Coupe sedan models 2020-)
- 61 21 086 Change 12-V lithium-ion auxiliary battery - register with battery replacement - (all 8' series Gran Coupe sedan models 2020-)
- 61 25 High-Voltage Battery Unit General Information
- 61 31 Switches
- 61 31 001 Removing/installing/replacing HDC buttons (all 8' series coupe models 2019-)
- 61 31 008 Removing and installing steering column switch cluster
- 61 31 011 Removing and installing/replacing coil spring cassette
- 61 31 021 Remove and install/replace ring antenna
- 61 31 035 Removing and installing/replacing steering column adjustment switch
- 61 31 037 Removing and installing/replacing light control unit
- 61 31 043 Removing and installing the FZD (all 8' series coupe models 2019-, 8' series Gran Coupe sedan models 2020-)
- 61 31 062 Removing and installing/replacing button for heated steering wheel
- 61 31 068 Remove and install/replace the switch for the front passenger airbag deactivation
- 61 31 082 Removing and installing/replacing switch for central locking system
- 61 31 083 Removing and installing/replacing switch for tailgate release
- 61 31 084 Removing and installing/replacing the switch for the power tailgate
- 61 31 113 Removing and installing/replacing both shift paddles for automatic transmission
- 61 31 117 Removing and installing/replacing power window switch on driver's side
- 61 31 118 Removing and installing/replacing the power window switch on the passenger's side
- 61 31 134 Removing and installing/replacing USB audio interface connecting socket
- 61 31 174 Removing and installing control unit for additional seat functions (left or right)
- 61 31 195 Removing and installing front controller
- 61 31 197 Removing and installing operating facility for center console
- 61 31 204 Replacing operating unit for seat adjustment
- 61 31 221 Removing and installing/replacing both multifunction steering wheel switches
- 61 31 231 Removing and installing/replacing steering wheel electronics control unit
- 61 31 233 Removing and installing/replacing the vibration actuator for lane departure warning
- 61 31 251 Remove & install audio operating facility
- 61 31 327 Removing and installing/replacing gear selector switch gearshift lever knob
- 61 31 329 Replacing START-STOPPING button trim
- 61 31 346 Replacing trim on gear selector switch and all trim of the operating facility in the center console
- 61 31 349 Replacing the cap for the electromechanical parking brake and trim under the gear shifter
- 61 31 362 Removing and installing remote control receiver (840i Coupe, 840i xDrive Coupe, M850i xDrive Coupe)
- 61 31 513 Replacing steering column switch cluster (after vehicle diagnosis)
- 61 31 544 Replace roof function center (FZD) (after vehicle diagnosis) (all 8' series coupe models 2019-, 8' series Gran Coupe sedan models 2020-)
- 61 31 676 Replacing control unit, additional seat function, right or left front (after vehicle diagnosis)
- 61 31 696 Replacing front controller (after vehicle diagnosis)
- 61 31 704 Replacing the operating facility in the center console (after vehicle diagnosis) (all 8' series coupe models 2019-, 8' series Gran Coupe sedan models 2020-)
- 61 31 043 Removing and installing the FZD (all 8' series convertible models 2019-)
- 61 31 078 Removing and installing/replacing switch for convertible top actuation (all 8' series convertible models 2019-)
- 61 31 362 Removing and installing remote control receiver (all 8' series convertible models 2019-)
- 61 31 544 Replace roof function center (FZD) (after vehicle diagnosis) (all 8' series convertible models 2019-)
- 61 31 704 Replacing the operating facility in the center console (after vehicle diagnosis) (all 8' series convertible models 2019-)
- 61 31 116 Replace power window switch for side window operation (rear left or right) (all 8' series Gran Coupe sedan models 2020-)
- 61 31 362 Removing and installing remote control receiver (all 8' series Gran Coupe sedan models 2020-)
- 61 33 Horn
- 61 34 Cigarette Lighter, Power Sockets
- 61 35 Control Units, Modules
- 6135... Notes on ESD protection (Electro Static Discharge)
- 6135... Overview, rain sensor (additional work when replacing the windshield/sensor replacement)
- 6135... Overview of additional work for the removal and installation or replacement of electronic components in the body area/windshield
- 61 35 013 Remove and install/replace the LIN power distribution box
- 61 35 021 Remove and install/replace near-field communication storage tray
- 61 35 026 Removing and installing control electronics, armrest heating, driver
- 61 35 027 Removing and installing control electronics, armrest heating, front passenger
- 61 35 080 Removing and installing control unit/module for left or right seat adjustment
- 61 35 177 Removing and installing the rain-light sensor
- 61 35 179 Remove and install rain-light-solar-condensation sensor
- 61 35 196 Removing and installing the control unit for the power tailgate (all 8' series coupe models 2019-)
- 61 35 240 Remove and install control unit for contactless trunk opening (all 8' series coupe models 2019-)
- 61 35 243 Remove and install the top sensor line for contactless trunk opening (all 8' series coupe models 2019-)
- 61 35 245 Remove and install the bottom sensor line for contactless trunk opening (all 8' series coupe models 2019-)
- 61 35 278 Removing/installing Body Domain Controller (BDC) control unit (with holder)
- 61 35 315 Remove and install the touch detection module (HOD)
- 61 35 430 Removing and installing control unit for self-locking differential (all 8' series convertible models 2019-)
- 61 35 582 Replacing the control unit/module for seat adjustment, left or right (after vehicle diagnosis)
- 61 35 678 Replacing rain/light sensor (after vehicle diagnosis)
- 61 35 697 Replacing control unit for automatic tailgate operation (after vehicle diagnosis) (all 8' series convertible models 2019-)
- 61 35 779 Replace Body Domain Controller control unit (BDC) (after vehicle diagnosis)
- 61 35 953 Removing and installing/replacing interior antenna for Comfort Access (front center console) (after vehicle diagnosis)
- 61 35 954 Removing and installing/replacing interior antenna for Comfort Access (rear storage compartment) (after vehicle diagnosis)
- 61 35 970 Removing and installing/replacing luggage compartment antenna for Comfort Access (after vehicle diagnosis)
- 61 35 980 Removing and installing/replacing antenna for Comfort Access on left or right (after vehicle diagnosis) (all 8' series coupe and convertible models 2019-)
- 61 35 147 Removing and installing the convertible top module (all 8' series convertible models 2019-)
- 61 35 196 Removing and installing the control unit for the power tailgate (all 8' series convertible models 2019-)
- 61 35 240 Remove and install control unit for contactless trunk opening (all 8' series convertible models 2019-)
- 61 35 243 Remove and install the top sensor line for contactless trunk opening (all 8' series convertible models 2019-)
- 61 35 245 Remove and install the bottom sensor line for contactless trunk opening (all 8' series convertible models 2019-)
- 61 35 648 Replacing convertible top module (after vehicle diagnosis) (Rear panel storage compartment removed) (convertible top module or CVM2) (all 8' series convertible models 2019-)
- 61 35 196 Removing and installing the control unit for the power tailgate (all 8' series Gran Coupe sedan models 2020-)
- 61 35 240 Remove and install control unit for contactless trunk opening (all 8' series Gran Coupe sedan models 2020-)
- 61 35 243 Remove and install the top sensor line for contactless trunk opening (all 8' series Gran Coupe sedan models 2020-)
- 61 35 245 Remove and install the bottom sensor line for contactless trunk opening (all 8' series Gran Coupe sedan models 2020-)
- 61 35 430 Removing and installing control unit for self-locking differential (all 8' series Gran Coupe sedan models 2020-)
- 61 35 697 Replacing control unit for automatic tailgate operation (after vehicle diagnosis) (all 8' series Gran Coupe sedan models 2020-)
- 61 35 980 Removing and installing/replacing antenna for Comfort Access on left or right (after vehicle diagnosis) (all 8' series Gran Coupe sedan models 2020-)
- 61 36 Fan Control Relay
- 61 42 Voltage Transformer
- 61 42 050 Removing and installing the voltage transformer/Power Control Unit (PCU) (all 8' series coupe models 2019-, 8' series Gran Coupe sedan models 2020-)
- 61 42 100 Removing and installing PCU48 (840i and 840i xDrive Coupe/Convertible/Gran Coupe sedan)
- 61 42 601 Replacing Power Control Unit 48 V (PCU 48) (840i and 840i xDrive Coupe/Convertible/Gran Coupe sedan)
- 61 42 050 Removing and installing the voltage transformer/Power Control Unit (PCU) (all 8' series convertible models 2019-)
- 61 61 Windshield Wiper System
- 61 67 Headlight Washer System
- 61 71 Windshield Washer System
- 61 71 004 Adjusting spray nozzles for washer system
- 61 71 051 Replace wind. washer system nozzle chain
- 61 71 063 Removing and installing the washer fluid reservoir for the washer system
- 61 71 065 Replace the washer fluid reservoir for the washer system
- 61 71 100 Removing and installing/replacing window washer pump
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.