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Why does my BMW 5 Series engine make a knocking noise?

I recently noticed my BMW 5 Series engine has been making a knocking noise. It seems to happen randomly, even when the car is idling. I'm concerned it could be a serious issue. Any idea what could be causing this?

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There could be a few reasons why your engine is making a knocking noise. One possibility is that your fuel injectors may be dirty or clogged, causing them to make a ticking sound. Another possibility is that your oil level may be low, which could lead to engine knocking. It's also possible that you have bad spark plugs or a problem with your timing belt. I recommend taking your car to a mechanic to get it checked out.

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