Engine Compartment Noise at Idle
Unusual noise from the engine compartment of a 2020 Ford Mustang at idle may indicate issues such as a failing serpentine belt, worn tensioner, or a faulty accessory component like the alternator or water pump.
Diagnosis Details
Possible Causes
Worn or loose serpentine belt causing squeaking or chirping
Faulty belt tensioner or idler pulley
Failing alternator, water pump, or A/C compressor bearing
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What You Should Do
Inspect the serpentine belt for cracks, glazing, or looseness.
Check belt tensioner and pulleys for play or noise.
Listen with a mechanic's stethoscope to isolate the source.
If noise persists, have a professional diagnose accessory components.
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Disclaimer: This AI-generated diagnosis is for informational reference only. Always consult a qualified mechanic for an in-person inspection. AutOwner is not responsible for decisions made based on this information.
