Musty Smell After Rain in Tesla Model 3
A musty odor after rain in a 2020 Tesla Model 3 is typically caused by moisture accumulation in the HVAC system, often due to a clogged evaporator drain or dirty cabin air filter. This can lead to mold or mildew growth, which produces the smell.
Diagnosis Details
Possible Causes
Clogged evaporator drain tube preventing water from draining properly, leading to moisture buildup and mold.
Dirty or saturated cabin air filter that traps moisture and promotes microbial growth.
Moisture trapped in the HVAC ducts or under the carpet from rain ingress (e.g., sunroof drains or door seals).
Related OBD-II Codes
Not satisfied with this diagnosis?
Try Another DiagnosisWhat To Do Next
What You Should Do
Inspect and clean the evaporator drain tube to ensure proper drainage.
Replace the cabin air filter if dirty or wet.
Run the HVAC system on high heat with recirculation off for 15-20 minutes to dry out the system.
If the smell persists, check for water leaks under the carpet or in the trunk area.
Related Repairs
Share this diagnosis
Help others with similar symptoms
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.
