A4 Quattro Cabriolet L4-2.0L Turbo (BWT) (2009)
Air Flow Meter/Sensor: Service and Repair
Mass Air Flow Sensor
Removing
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Disconnect electrical connector - 1 - from mass air flow (MAF) sensor (G70).
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Remove both bolts - arrows - of the air duct at the lock carrier.
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Disconnect air duct - 2 - from air filter housing.
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Open hose clamp on air duct hose to turbocharger and pull it off at Mass Air Flow (MAF) Sensor (G70).
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Remove both bolts from Mass Air Flow (MAF) Sensor (G70).
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Carefully pull the Mass Air Flow (MAF) Sensor ( G70) out of the guide from air filter housing.
Installing
For problem-free operation of the Mass Air flow (MAF) Sensor (G70) it is very important to observe the following notes and procedures.
‹› If the air filter element is very dirty or soaked, dirt particles or moisture may have contaminated the Mass Air Flow (MAF) Sensor (G70) and may
be causing false mass air flow values. This results in a reduction of power, since a lower injection quantity is calculated.
‹› Always use an original equipment air filter element.
‹› Use a lubricant (silicone-free) for installing the air duct hose.