Preparation - vehicles with 4.2L 8-cylinder FSI engine (Audi RS4)

Procedure 

Fig 1: Pulling Rear Engine Cover Off

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• Remove rear engine cover in direction of - arrows  -.

Fig 2: Identifying Bolts & Air Duct

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• Remove screws - arrows  -.
• Remove air duct - 1  - and - 2  -.

Fig 3: Identifying Mass Air Flow (MAF) Sensor G70 Electrical Harness Connector, Secondary Air Injection (Air) Pump Hose, Vacuum Lines & Air Guide Hose

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• Disconnect electrical connection - 4  - for Mass Air Flow (MAF) Sensor G70.
• Remove hose - 5  - to Secondary Air Injection (AIR) pump.
• Remove vacuum hoses - 1  -.
• Remove air guide hose - 3  - at Mass Air Flow (MAF) Sensor.

• Free up wiring harness at air filter housing.
• Remove screws - arrows  - and remove upper part of air filter housing.
• Disengage electrical wiring harness bracket at body.
• Remove clip - arrow  - and remove air filter housing with Mass Air Flow (MAF) sensor.

Install in reverse order of removal.