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What are some common issues with the BMW 4 Series engine?

I have noticed some strange noises coming from my BMW 4 Series engine. It seems to be running rough and not as smooth as usual. What could be causing this and how can I fix it?

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One common issue with the BMW 4 Series engine is a faulty ignition coil. It can cause misfiring and rough engine performance. I would recommend getting it checked and replaced if needed by a trusted mechanic.

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