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Why does my BMW M3's engine produce a rattling noise on start up?

I recently noticed that my BMW M3's engine makes a rattling noise when I start it up. It goes away after a few minutes of driving, but I'm concerned it could be a sign of a larger issue. Has anyone else experienced this and should I be worried?

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It's common for BMW M3 engines to produce a rattling noise on start up. This could be due to a faulty or worn out timing chain tensioner. I would recommend taking your car to a BMW specialist for a proper diagnosis and repair if needed.

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