RS 4 Quattro Sedan V8-4.2L (BNS) (2007)
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Remove hose clamps - 1 - and - 3 - and lay air guide hose aside.
CAUTION!
Hose connectors - 4 - must not be opened.
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Disconnect electrical harness connector - 3 - at Mass Air Flow (MAF) Sensor (G70).
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Remove hose - 1 - to Secondary Air Injection (AIR) pump by pressing release buttons.
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Disconnect air guide hose - 4 - at Mass Air Flow (MAF) sensor.
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Free up wiring harness - 2 - at air filter housing.
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Remove screws - arrows - and remove the air filter housing upper section.
Installing
Installation is in reverse order of removal, note the following.
For trouble-free function of the Mass Air Flow (MAF) sensor, it is important to observe the following notes and perform the work procedures exactly.