What is MAF on Audi?

The MAF sensor is a sensor that tracks the flow rate of air that goes into the internal combustion chamber before fuel is injected into it. Determining the mass flow rate of air plays a big role in determining the correct fuel mass that should be delivered into the combustion chamber.

Where is the MAF sensor on Audi a4?

The MAF is located in the front right corner of the engine compartment under the air intake duct (red arrow).

What does the MAF sensor on an Audi A4 do?

A MAF sensor measures the density of the air entering the intake manifold. It passes this information onto your A4’s ECU. The ECU uses this information along with other sensor data to control the amount of fuel that enters the combustion chamber. If you do determine that you need a new mass airflow sensor, they aren’t too expensive.

Do you need a new air flow sensor for an Audi A4?

What isn’t attractive is a struggling A4 that needs its air flow sensor replaced. Accomplish this by purchasing a new Audi A4 MAF sensor from AutoZone today. You want maximum horsepower every time you drive your A4, and an old, miscalculating air flow sensor doesn’t allow you to achieve that.

What are the symptoms of a bad MAF sensor?

When the mass airflow sensor has gone bad, you’ll definitely feel it. Here are the most common symptoms of a bad or failing MAF sensor: Idle Issues – Your A4 may run rich or lean when idling, or it may also idle erratically. A rich condition is when there is not enough air relative to the fuel in the air/fuel mixture.

What causes an Audi A4 to run lean or rich?

Idle Issues – Your A4 may run rich or lean when idling, or it may also idle erratically. A rich condition is when there is not enough air relative to the fuel in the air/fuel mixture. The exhaust color is usually darker when running rich. A lean condition is when there is too much air relative to fuel in the air fuel mixture.