Why does my Audi A4 keep stalling at low speeds?

I recently purchased a used Audi A4 and have noticed that it tends to stall when I am driving at low speeds or when I come to a stop. What could be causing this issue and how can I fix it?

It is possible that your car may have a faulty idle air control valve. This valve controls the amount of air that enters the engine when the car is idling. If it is malfunctioning, it can cause stalling at low speeds. It may need to be replaced or cleaned.

Another possible cause could be a dirty or clogged fuel filter. This can restrict the flow of gasoline to the engine and cause stalling. Try replacing the fuel filter and see if the issue persists.