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How do I troubleshoot a rough idle in my BMW 3 Series?

I've noticed that my BMW 3 Series has a rough idle when I come to a stop. What could be causing this and how can I fix it?

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J

One potential cause of a rough idle in a BMW 3 Series could be a dirty or clogged air filter. I would suggest checking and replacing the air filter if necessary to see if that helps improve the idle.

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