12 51 001 Replacing wiring harness section for engine (N12)

Necessary preliminary tasks: 

• Read out fault memory of DME control unit.
• Switch off ignition.
• Disconnect BATTERY NEGATIVE LEAD .
• Remove INTAKE FILTER HOUSING .
• Remove intake plenum. See 11 61 050 REMOVING AND INSTALLING INTAKE AIR MANIFOLD (N12) .
• Remove right engine mount. See 22 11 001 REPLACING RIGHT ENGINE MOUNT .

Unlock and remove cover (1).

Fig 1: Locating Wire Harness Section Cover

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Unlock the two rear plugs (1) and disconnect.

Fig 2: Identifying Rear Plugs

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Unlock plugs (1) for camshaft sensors and disconnect.

Unlock plug (2) for oil pressure sensor and disconnect.

Unlock and detach vacuum line (3).

Detach cable duct (4) upwards from holder.

Fig 3: Disconnecting Cable Duct From Holder

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Release screws. Tightening torque 13 53 4AZ. Detach fuel rail (1) from cylinder head.

Fig 4: Detaching Fuel Rail From Cylinder Head

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Pull off fuel injection pipe (1) from cylinder head until connectors of fuel injectors are accessible Unlock connector (1) and remove.

Fig 5: Identifying Fuel Rail With Connector

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Installation note:  Replace sealing rings on fuel injectors and coat with rubber care product.