mildew smell from air conditioning · ac smells like wet socks
A musty, moldy or "wet sock" smell comes from the air vents, especially noticeable right when the AC or heater first turns on.
Replace the cabin air filter first if it has not been changed recently - it is a cheap, common contributor to this smell.
Safe to drive - this is a comfort and air quality issue rather than a mechanical safety concern.
Describe your situation more precisely (e.g. exactly when it gets worse, how long it lasts) and get an expanded, personalized breakdown.
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Descriptions are for guidance only and do not replace a workshop inspection. If you are ever unsure whether it is safe to keep driving, pull over in a safe spot.
Burning rubber smell
WarningA distinct burning rubber odor, either while driving or after parking, sometimes with light smoke.
Burning oil smell
WarningA sharp, acrid smell of hot oil, usually from the engine bay, sometimes with light smoke from under the hood.
Sweet smell from the engine bay
SeriousA distinct sweet, syrupy odor (often compared to maple syrup) coming from the engine bay or vents, usually meaning coolant.
Smell of gasoline
SeriousA noticeable gasoline odor either inside the cabin or around the car, especially strong right after fueling or while driving.
