How to fix the intermittent starting issue in Audi 80?

My Audi 80 sometimes has trouble starting, and it's becoming more frequent. The battery and starter have been checked and are in good condition, what else could be causing this issue?

It could be an issue with the fuel pump relay. This relay controls the power to the fuel pump and can cause intermittent starting problems when it starts to fail.

You may need to check the ignition switch. A worn or faulty ignition switch can cause starting issues and needs to be replaced.

Have you checked the spark plugs? Worn or dirty spark plugs can affect the starting of your car, and they should be replaced every 30,000 miles for optimal performance.