What causes the spark plugs to fail prematurely in an Audi 80?

I have noticed that my Audi 80's spark plugs seem to wear out faster than they should. What could be causing this issue and how can I prevent it?

The most common cause of premature spark plug failure in the Audi 80 is a faulty ignition coil. This can cause the spark plug to misfire and wear out faster than normal. To prevent this, make sure to regularly check and replace your ignition coils as needed.

Another potential cause for premature spark plug failure is a dirty air filter. If your air filter is clogged, it can cause the engine to run too rich, leading to faster wear on the spark plugs. Make sure to regularly check and replace your air filter.

One less common but still possible cause is using the wrong spark plugs for your Audi 80's model. Make sure to check and use the correct type of spark plugs recommended by the manufacturer to avoid premature failure.