What could be the reason for the humming sound coming from a Lincoln MKZ?

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The causes of the humming noise in the Lincoln MKZ could be a dirty air filter or a slipping drive belt. It's important to replace the coolant every 60,000 miles, while the air filter should be replaced every 15,000 to 30,000 miles. Spark plugs typically need changing every 100,000 miles, unless they are copper, in which case they should be changed every 30,000 miles. Engine issues may arise such as loose gaskets or a popped spark plug, which can lead to problems. Prompt repairs should be made for oil leaks and excessive oil usage, as well as addressing engine overheating, which can be a serious issue potentially causing fires and even explosions.

What could be the reason for the humming sound coming from a Lincoln MKZ?

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