12 51 100 Replacing wiring harness section for ignition and injectors (N55)

IMPORTANT: Read and comply with notes on PROTECTION AGAINST ELECTROSTATIC DISCHARGE (ESD PROTECTION) .

Necessary preliminary tasks:

Release oxygen sensor connector (1) from bracket.

Release screw (2).

Put cable clip aside.

Fig 1: Identifying Oxygen Sensor Connector And Screw

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Unlock rear plug (1) from the control unit and disconnect.

Release rear wiring harness from intake plenum.

Fig 2: Identifying Control Unit Rear Plug

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Release bolt (1) at rear of cable channel.

Tightening torque: 12 90 1AZ .

Fig 3: Identifying Bolt

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Release nuts (1) and remove earth cable.

Tightening torque: 12 90 5AZ .

Unlock all connectors from ignition coils and injectors and detach.

Unclip, feed out and remove wiring harness (2).

Fig 4: Identifying Nuts And Wiring Harness

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NOTE: Check stored fault messages.
Delete fault memory.