Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSAUDI2012A3 (8PA) L4-2.0L TURBO (CCTA)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSSENSORS AND SWITCHES - COMPUTERS AND CONTROL SYSTEMSAIR FLOW METER/SENSORSERVICE AND REPAIR
2012 Audi A3 (8PA) L4-2.0L Turbo (CCTA)
Air Flow Meter/Sensor: Service and Repair
2012 Audi A3 (8PA) L4-2.0L Turbo (CCTA)SECTION Service and Repair
Mass Airflow Sensor (G70)
- Disconnect electrical connector - 1 - on Mass Airflow (MAF) sensor (G70).
- Remove both bolts from the MAF sensor and carefully remove the MAF sensor from the air filter housing guide.
Installing
For problem-free operation of the MAF sensor it is very important to observe the following notes and procedures.
• If the air filter is very dirty or soaked, dirt particles or moisture may have contaminated the MAF sensor and may be causing false mass airflow values. This results in a reduction of power, since a lower injection quantity is calculated.
• Always use an original air filter.
• Use a lubricant (silicone-free) for installing the intake hose.
• Secure all hose connections using hose clamps appropriate for the model type: Electronic Parts Catalog (ETKA)
- Check the MAF sensor and intake hose (intake air side) for salt residue, dirt, and leaves.
- Check the intake channels up to the air filter for dirt. If any contaminants are discovered, clean the air filter housing (upper and lower sections) of salt residue, dirt and leaves (if necessary, clean by washing or vacuuming). Air filter, removing and installing, refer to => [ Air Filter ] Air Filter.
Further installation is performed in reverse order.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.