Removing the intake plenum

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.

NOTE: TECHNICAL INFORMATION
Additional coolant can leakage. Make sure that no coolant enters the intake port of the cylinder head.

NOTE: TECHNICAL INFORMATION
Collect and dispose of emerging fluids. Observe country-specific waste disposal regulations.

Preliminary work

Refer to BRINGING FRONT COMPARTMENT LID IN THE SERVICE POSITION .
Refer to DEACTIVATING ELECTRICAL SYSTEM .
Refer to REMOVING THE SEAL FOR THE HOOD REAR .
Refer to REMOVING THE ACOUSTIC COVER .
Refer to REMOVING ACOUSTIC COVER AT REAR .
Refer to REMOVING TANK VENT VALVE .
Refer to REMOVING THE DME CONTROL UNIT .
Refer to REMOVING THE INTEGRATED POWER SUPPLY MODULE (PDM) .
Refer to REMOVING CONTROL UNIT BRACKET .
Refer to REMOVING THE FRONT UNDERBODY PROTECTION .
Refer to REMOVING THE UNDERBODY PROTECTION OF THE STEERING GEAR .
Refer to IF INSTALLED: REMOVING THE UNDERBODY PROTECTION OF THE STEERING SYSTEM .
Refer to IF INSTALLED: PARTIALLY RELEASING THE ENGINE OIL COOLER .
Refer to DRAINING THE COOLANT FROM THE LOW-TEMPERATURE COOLING SYSTEM .
Refer to CONNECTING THE COOLANT LINES FOR THE LOW-TEMPERATURE COOLANT CIRCUIT .
Refer to IF INSTALLED: SECURING THE ENGINE OIL COOLER .

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
Additional coolant can leakage. Make sure that no coolant enters the intake port of the cylinder head.

NOTE: TECHNICAL INFORMATION
Collect and dispose of emerging fluids. Observe country-specific waste disposal regulations.

Loosen screw (1).
Guide tank ventilation line (2) out of clamp (3) and remove it.

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Unlock and release the plug connections (1).
Unlock the locks (2).
Guide tank ventilation line (3) out of clamp (4) and remove it.

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Unlock the locks (1).
Feed the tank ventilation line (2) out and set it aside.

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Unlock the locks (1).
Feed out the wiring harness section (2) for the sensor system 2 and set it aside.

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Loosen screws (1).
Feed out charge air line (2) and place to one side.

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Unlock and release plug connection (1).
Loosen clamp (2).
Thread off coolant line (3) and place to the side.
Loosen screw (4).

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Unlock and release plug connection (1).

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Unlock the locks (arrows).
Feed out the wiring harness section (1) for the injectors and ignition coils and put to one side.

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Guide tank ventilation line (1) out of clamp (2) and place it aside.

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Feed out the wiring harness section (1) for the injectors and ignition coils of the cylinder head cover (2) and put to one side.

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Loosen screw (1).

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Unlock and loosen coolant line (1).
Catch and dispose of escaping coolant.

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Loosen screws in the order (7) to (1).
Slightly lift intake plenum (A) in arrow direction.

Fig 1: Intake Plenum Screws Loosening Sequence
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NOTE: TECHNICAL INFORMATION
The tension rod screws and mounting bolts from the connecting neck on the intake plenum are not allowed to be opened.

Do not release screws in the marked area on the intake plenum (1).

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NOTE: TECHNICAL INFORMATION
Additional coolant can leakage. Make sure that no coolant enters the intake port of the cylinder head.

Unlock and release the coolant line (1) under the intake plenum (2).
Catch and dispose of escaping coolant.
Feed out the intake plenum (2) and remove it.

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Empty the remaining coolant (2) from the intake plenum (1).

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NOTE: TECHNICAL INFORMATION
The tension rod screws and mounting bolts from the connecting neck on the intake plenum are not allowed to be opened.

Do not release screws in the marked area on the intake plenum (1).

Courtesy of BMW OF NORTH AMERICA, INC.