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What are the most common mechanical issues in the BMW 3 Series?

I've been having some trouble with my BMW 3 Series and I'm wondering what are the most common mechanical issues that I should be aware of. I want to know how to prevent them and what I can do to fix them when they occur.

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One of the most common issues in the BMW 3 Series is the failure of the drive belt tensioner. This can lead to a loss of power steering, alternator, and air conditioning.

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Another common problem is with the cooling system, particularly the water pump and thermostat. Make sure to do regular maintenance and replace any faulty parts as soon as possible.

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Electrical issues are also prevalent in the BMW 3 Series. Keep an eye out for warning lights on the dashboard and have your battery and alternator checked regularly.

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