The vehicle has a loud knocking sound coming from the engine area.
Loud knocking sounds from the engine are often a sign of catastrophic failure, but not in every case. Inspect the engine oil level, and look for metallic flakes floating within the oil. Worn or broken parts along the engines belt drive system can also cause very loud noises in the engine bay. Have a trained mechanic inspect the engine compartment and verify which component is causing the noise.
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