A3 Quattro V6-3.2L (BUB) (2008)
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Air Filter Element: Service and Repair
Air Filter Element
Removing
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Disconnect vacuum hose - 2 - from air duct hose, if present.
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Disconnect air guide hose - 1 - from Throttle Valve Control Module (J338).
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Disconnect Mass Air Flow (MAF) Sensor (G70) electrical connector - 3 -.
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Unbolt upper section of air filter housing - arrows -.
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Remove air filter element.
Installing
Installation is in reverse order of removal, noting 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.
‹› In the event the air filter element is severely soiled or completely saturated, dirt particles or moisture may penetrate the MAF sensor and falsify the
measured air mass value. This results in a reduction of power, since a lower injection quantity is calculated.
‹› Always use an original equipment air filter element.
‹› Air filter housing must always be clean.
‹› Secure all hose connections using hose clamps appropriate for the model type.
‹› Note the following when blowing out air filter housing with compressed air: To prevent malfunctions, cover critical air-flow engine components
such as Mass Air Flow (MAF) sensor, air duct pipes etc. with a clean cloth.
‹› Observe disposal regulations!
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Blow out the water drain (small hole in lower section of air filter housing) with compressed air.
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Clean air filter housing (upper and lower sections) of salt residue, dirt or leaves (use vacuum cleaner if necessary).
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Check Mass Air Flow (MAF) sensor and air duct hose (clean air side) for salt residue, dirt and leaves.
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Check air duct from lock carrier to air filter housing for dirt and leaves.
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When installing air filter element, make sure it is put on centered in mount in lower section of air filter housing.
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Place upper section of air filter housing on to lower section or air filter housing carefully and without using excessive force. When doing this,
