Why is there a bad smell coming from my car vents?
Moisture and debris trapped in the air conditioning system or cabin filter create a foul, musty odor that lingers when the vehicle is turned off. This makes starting the car an unpleasant experience even though the smell often fades once you start driving.
What people tried
Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.
- 1Replacing the cabin air filter
- 2Spraying Lysol into the passenger footwell area with climate control on full hot and recirculation
- 3Checking the evaporator drain tube for clogs
- 4Driving the car until the smell goes away or until getting used to it
In their words
Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.
“the moment she got it back it had a strong BO smell. I figured it would go away but it’s been a few weeks and the stench has not left.”source ↗
“We replaced the cabin air filter and the smell is still there, it is coming from the vents, anyone know how to get rid of this??”source ↗
“for the past few days ive noticed that the car smells like something rotten or a bad fart when I first enter the car but the smell quickly goes away when driving.”source ↗
“The smell is NOT there during the drive but only after the car has been off for some time.”source ↗
Where this came up
People with this problem also raised
- 3Car shaking and burning smell while driving
- 6Why does my car smell like gas when I accelerate?
- 2Why is there a raw fuel smell and rough idle when stopped?
- 3Smoke and oil leaking from engine bay after driving
- 2Water leaking under the glovebox on the passenger side
- 2Why does my electrical appliance smell like fish or burnt rubber?