What are the effects of breathing mold from carpeting, etc. in an automobile?
Molds produce allergens, irritants, and in some cases, toxic substances called mycotoxins. Inhaling or touching mold or mold spores may cause allergic reactions in sensitive individuals, and the responses will differ depending on which mold is growing there. Typical allergic responses present sneezing, runny nose, red eyes, and skin rash (dermatitis).
If an allergic response occurs, then the problem is exacerbated. There may be an asthma attack, and irritation, even heart issues especially if someone is young, elderly or in vulnerable health
Mold in a car would have to be considered carefully. For example, if you just opened the window and drove, you’d be likely let in a lot of air with only ambient levels. But the force of air would also stir up the mold. Probably the best thing to do would be to remove the moldy items, and clean/remediate the area as well as possible before driving around in it.