What Causes Bad Odor Inside a Car?

1 Answers
StEden
07/29/25 5:50pm
The causes of bad odor inside a car include odors from items in the car, air filter odors, and evaporator odors. Below are the reasons for bad odor inside a car: Odor caused by the air filter: When the air conditioning is turned on, a sour and musty smell blows out, but this condition usually improves after a while. In fact, this odor is a sign that the air filter needs to be replaced. The air conditioning system has been decomposed by bacteria, leading to mold, and replacing the air filter can alleviate the odor. Odor caused by the evaporator: If the odor persists even after replacing the air filter, this situation points directly to the evaporator. It is caused by mold inside the evaporator, and cleaning the evaporator and air conditioning ducts is necessary.
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