Why is my Audi A8 producing less power?

I've noticed that my Audi A8 is not as powerful as it used to be. What could be causing this issue and how can I fix it?

One possible reason for your loss of power could be a clogged air filter. It's important to regularly check and replace your air filter to ensure optimal engine performance.

Another possible cause for decreased power is a faulty oxygen sensor. This can cause incorrect air-fuel ratios and consequent loss of power. It's best to have a professional diagnose and replace the sensor if necessary.