How often should I replace my Audi A2's spark plugs?

I have noticed that my Audi A2's engine seems to be struggling and I am wondering if it could be due to old spark plugs. How often should I replace them?

It is recommended to replace your spark plugs every 30,000 to 50,000 miles to maintain optimal engine performance. However, if you notice any signs of wear or decreased performance, it may be necessary to replace them sooner.

I would suggest replacing your spark plugs once a year or every 12,000 miles, whichever comes first. It's better to err on the side of caution and keep your engine running smoothly.