Audi Mass Air Flow (MAF) Sensor Symptoms | Replacement Guide

Symptoms

This is what you may notice if your Audi MAF sensor is bad or dirty: 

• Check engine light stays on
• Car is hard to start. 
• Engine stalls soon after starting.
• The engine runs unusually lean or rich.
• Audi hesitates when idle or under load.
• Car jerks during acceleration.

What you will need

• Audi MAF Sensor
• Screwdriver

Procedure

1. Open the hood of the Audi. The hood release is located under the dashboard on the driver's side.

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2. Locate the mass airflow sensor next to the engine air filter.  

   
3. Unplug the electrical connector from the Audi mass airflow sensor. Press the connector, then pull it to unplug it from the MAF sensor.
4. Replace model MAF Sensor. Remove the two screws that hold your Audi mass airflow sensor in place. 
5. Install the new MAF on your Audi. Tighten the screws so that they are snug. Plug the electrical connector until it locks in place. 

Part Numbers

Below is a table that shows several Audi MAF sensor part numbers and applicable model years; when applicable, cross-reference part numbers have been provided.

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