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What is the most common issue with the coolant system in a BMW 3 Series?

I recently noticed that my BMW 3 Series is constantly losing coolant and I can't find any leaks. What could be causing this and how can I fix it?

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J

One of the most common issues with the coolant system in a BMW 3 Series is a faulty water pump. It may be leaking or not functioning properly, causing the coolant to constantly evaporate. It's important to get this fixed as soon as possible as low coolant levels can lead to overheating and engine damage.

E

Another possible cause could be a leak in the radiator or one of the hoses connected to it. These should be inspected for any cracks or damage and replaced if necessary.

M

You should also check the coolant reservoir for any cracks or signs of leaks. If it is damaged, it will need to be replaced.

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