Removing the wiring harness section of the transmission wiring harness

WARNING: This page is about a different car, the 2025 BMW M4, 2024 BMW M4, 2023 BMW M4, 2022 BMW M4, and 2021 BMW M4. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Working on 12 V electrical system .
Risk of short circuits! Risk of fire!

Make sure that there is no charger connected to the jump start terminal in the engine compartment.
Detach battery ground lead from battery.
For auxiliary batteries: Detach battery minus cables from all auxiliary batteries.

NOTE: RISK OF DAMAGE
Damage to battery terminal, the safety battery terminal or the intelligent battery sensor (IBS) .
Damaged battery terminals can lead to malfunctions or vehicle electrical system faults .

Detach battery terminal from battery pole by carefully shifting to and fro. Do not pry off using a tool.

Preliminary work

Refer to REMOVING THE FRONT SPOILER .
Refer to REMOVING THE FRONT UNDERBODY PROTECTION .
Refer to REMOVING THE LEFT AND RIGHT FRONT UNDERSHIELD .
Refer to REMOVING THRUST FIELD .
Refer to REMOVING THE CONNECTING SUPPORT FROM THE TUNNEL .
Refer to REMOVING EXHAUST SYSTEM .
Refer to REMOVING THE TANK COVER .
Refer to REMOVING THE LEFT THRUST FIELD .
Refer to REMOVING THE REAR HEAT SHIELD .
Refer to REMOVING FRONT HEAT SHIELD .
Refer to PARTIALLY LOOSENING THE PROP SHAFT .
Refer to REMOVING TRANSMISSION BEARING SUPPORT .
Refer to REMOVING TRANSMISSION MOUNTING BRACKET (ALL-WHEEL DRIVE VEHICLE) .
Refer to REMOVING THE SEAL FOR THE HOOD REAR .
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 DISCONNECTING ALL BATTERY GROUND LEADS .
Refer to REMOVING LEFT AND RIGHT WIPER ARM .
Refer to REMOVING WINDSHIELD PANEL COVER .
Refer to REMOVING TRAILING LINK AT SPRING BOLT .
Refer to REMOVING THE CENTER COWL UPPER PART .
Refer to REMOVING THE CENTER BULKHEAD LOWER PART .
Refer to REMOVING SUSPENSION STRUT BRACE .
Refer to REMOVING THE COVER FOR THE DME CONTROL UNIT .
Refer to REMOVING THE DME CONTROL UNIT .
Refer to REMOVING THE INTEGRATED SUPPLY MODULE (PDM) PARTIALLY .
Refer to REMOVING THE CONTROL UNIT HOLDER .

Wiring harness section of transmission wiring harness

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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: 61 35... NOTES ON ESD (ELECTROSTATIC DISCHARGE) PROTECTION .

NOTE: RISK OF DAMAGE
Damage to wires when disconnecting connectors and plug connections .
Sheared wires can cause a short circuit .

Do not pull on wires when disconnecting connectors and plug connections.

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.

Unlock the locks (1) .
Guide out cable holder (2) and set aside.

Courtesy of BMW OF NORTH AMERICA, INC.
Unlock lock (1) .
Guide out cable holder (2) and set aside.

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Release the clamps (arrows) and set aside.
Loosen screws (1) .
Unlock lock (2) .
Remove wiring harness section (3) of the transmission wiring harness and set aside.

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Release cable bracket (1) .

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Unlock plug connection (1) and disconnect.
Release the clamps (arrows).
Guide out wiring harness section (2) of the transmission wiring harness and keep it aside.

Courtesy of BMW OF NORTH AMERICA, INC.
Loosen the holder (1) .
Loosen screw (2) .
Feed out and remove the cover (3) .

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Unlock plug connection (1) and disconnect.

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Slightly lower the transmission
Support the transmission using special tools 2 219 012 and 0 495 498 (23 4 050) .
Secure the transmission with the luggage strap (1) .

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Release the clamps (1) and set aside with the cable.
Loosen screws (2) .
Slightly lower the transmission (3) .

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Unlock plug connection (1) and disconnect.
Loosen the clamp (arrow).
Remove wiring harness section (2) of the supply module and set it aside.

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Unlock plug connection (1) and disconnect.
Loosen the clamp (arrow).

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Release the clamps (1) .
Remove wiring harness section (2) of the transmission wiring harness and set aside.

Courtesy of BMW OF NORTH AMERICA, INC.
Guide out and remove wiring harness (1) of the transmission module.

Courtesy of BMW OF NORTH AMERICA, INC.