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How can I troubleshoot a rough idle in my Audi A3?

My Audi A3 is experiencing a rough idle and I'm not sure what's causing it. How can I diagnose and fix this issue?

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First, check your spark plugs and ignition coils. If they are worn or dirty, they can cause a rough idle. If they are in good condition, the issue may be with your fuel system. Check the fuel filter and injectors for any clogs or leaks.

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