How often should I replace the spark plugs on my Audi A3?

I've been noticing decreased engine performance and I'm not sure if it's because of worn out spark plugs. Any advice on when to replace them?

It is recommended to replace your spark plugs every 30,000 miles or every 3-4 years, whichever comes first. However, if you notice a decrease in engine performance or difficulty starting your car, it's best to replace them sooner rather than later.

I would recommend checking your owner's manual for the specific recommended replacement interval for your Audi A3. It can vary depending on your driving habits and the type of spark plugs you have installed.

I had a similar issue with my Audi A3 and replacing the spark plugs made a noticeable difference in engine performance. I would suggest getting them checked and replaced if needed.