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 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.

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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 the 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.

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Unlock the locks (1).
Feed out the cover (2) and remove.

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Unlock and disconnect the plug connections (1) and (2).
Loosen clamp (3).
Feed out the wiring harness section (4) of the transmission wiring harness from the holder (arrow) and set it aside.

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Unlock the lock (1).
Feed out and remove the connector (2) in the arrow direction from the holder (3).

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Loosen screws (1).
Remove the holder (2).

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Release the screw (1) and disconnect the ground strap.

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Slowly release the clutch slave cylinder, otherwise air will be sucked in via the sealing sleeve.
The pressure line of clutch slave cylinder remains connected.
Release the screws (1) and remove the clutch slave cylinder (2) with the holder (3).

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Unlock the locks (1) in arrow direction.
Pull out the bearing journal (2) in arrow direction and release the gearshift arm (3).

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Detach retaining clip (2).
Pull the gearshift rod (1) in arrow direction out of the gearshift rod joint (3).

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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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Loosen screws (2).
Slightly lower the transmission cross member (1) with the transmission.

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Unlock and disconnect the plug connection (1) on the gear sensor.

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Loosen clamp (1).

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Release the clamps (arrows).
Guide out wiring harness section (1) of the transmission wiring harness and keep it aside.

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Guide out and remove wiring harness (1) of the transmission module.

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