Why is the idle speed on my Audi A4 fluctuating?

I've noticed that the idle speed on my Audi A4 seems to be constantly changing, going up and down without any input from me. Is this normal or is there something wrong with my car?

This can be a common issue with Audi A4s, but it's important to address it to prevent any potential problems. One possibility is that the idle control valve may be dirty or malfunctioning.

Another potential cause could be a vacuum leak, which can cause the idle speed to fluctuate. It's important to have a professional diagnose and fix this issue to avoid further damage to your engine.

It's also important to check for any stored error codes in the car's computer system. These can provide valuable information about the source of the issue and help guide the repair process.