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Q: There is a loud growl to the engine when I drive at any speed on 2005 Mazda B2300

This occurs all the time
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Do you hear this noise with the engine running and car parked? If the only time you hear it is when moving it aint the motor.
Most likely wheel bearing noise.
At 40MPH , the 'growl' is present? If so , keep same vehicle speed and downshift trans , if the 'growl' stays consistent it's not the engine , most likely.If noise changes with engine speed , then need to have a mechanic there listen to it , first-hand.
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