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Why does my Audi A2's engine make a rattling noise while idling?

My Audi A2 has been making a rattling noise whenever I'm at a stop or idling. It goes away once I start driving. What could be the cause of this and how can I fix it?

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Answers (3)

This could be due to a faulty crankshaft position sensor. It's best to have it checked and replaced by a professional mechanic. Additionally, make sure your engine oil is at the correct level.

C

I experienced the same issue with my Audi A2 and it turned out to be a loose heat shield on the exhaust. You can try securing it with a hose clamp or have it fixed at a repair shop.

R

The rattling noise could also be caused by a worn out serpentine belt. Make sure to have it inspected and replaced if necessary.

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