What Causes Bad Odor Inside a Car?

[VonCollin]

The causes of bad odor inside a car are as follows: 1. Extensive use of plastic, rubber, and other materials in car interiors: Organic solvents, additives, and other components in these materials gradually release into the car's environment during use. 2. Odor caused by the cabin air filter: This odor indicates that the cabin air filter needs replacement, as it has been decomposed by bacteria and become moldy. Replacing the filter will alleviate the odor. 3. Odor caused by the evaporator: This occurs due to mold growth inside the evaporator, requiring cleaning of the evaporator and the air conditioning ducts.