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Why does my Audi A4 have a rattling noise when I start it?

I have a 2015 Audi A4 and every time I start it up, there is a noticeable rattling noise coming from the engine. Is this normal or should I be concerned?

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This rattling noise is most likely coming from your fuel injection system. It is a common issue in Audi A4s and can be easily fixed by cleaning or replacing the fuel injectors.

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