J
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Why is my BMW 3 Series making a strange noise when I start it?

I've noticed that my BMW 3 Series is making a strange noise when I start it. It sounds like a rattling noise and it only lasts for a few seconds. What could be causing this and is it something I should be concerned about?

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J

It's common for BMW 3 Series to make a rattling noise when starting up. This is usually caused by the timing chain tensioner which may need to be replaced. It's not a pressing issue, but it's recommended to have it checked by a mechanic to ensure there are no underlying issues.

A

I had a similar issue with my BMW 3 Series and it turned out to be a loose heat shield. It's an easy fix and shouldn't cost much. Just take it to a reputable mechanic and they should be able to tighten it for you.

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