Febreze CAR fights vehicle odors Simply attach this car air freshener to the air vent to begin cleaning your car of odors and slowly release a light, fresh scent for up to 30 days.* The scent dial puts you in the driver's seat, allowing you to select the perfect amount of freshness for you and your passengers. Don't give odors a ride. fight them with Febreze CAR. *On low and under ambient conditions.