Musty Odor After Rain in Tesla Model Y
A musty smell after rain in a 2021 Tesla Model Y is typically caused by moisture accumulation in the cabin air filter or HVAC evaporator, leading to mold or mildew growth.
Diagnosis Details
Possible Causes
Clogged or wet cabin air filter with mold/mildew growth
Moisture trapped in the HVAC evaporator case due to poor drainage
Water intrusion from sunroof drains or door seals
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What You Should Do
Replace the cabin air filter (Tesla recommends every 2 years or as needed).
Use an HVAC evaporator cleaner foam to kill mold.
Check and clear sunroof drain tubes if present.
Ensure floor mats and carpets are dry.
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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.
