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A humming noise in a 2001 Saturn SL2 when driving over 50 mph could indicate several potential issues. It might be related to worn wheel bearings, which can produce a humming sound as they fail. Another possibility is tire problems, such as uneven wear or unbalanced tires, which can create noise at higher speeds. Lastly, the noise could also stem from issues with the drivetrain or transmission components.

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4mo ago

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