1Applicable Model: Car perfume system refill is replacement for X1 X3 X4 X5 X6 X7 5 series 6 series 7 series, please confirm whether your model is applicable before buying. 2Long Lasting Fragrance: The car fragrance system supplement can continue to emit fragrance, so that the inside of the car fragrance lasting, maintain the pleasure of drivers and passengers. 3In Car Purification: The car fragrance system supplement not only emits fragrance, but also helps to purify the air in the car, remove odors and bacteria, and provide a cleaner and healthier driving environment. 4Versatile: The fragrance can be used to freshen and reduce various odors in the car, including formaldehyde, cigarettes, air conditioning odors, interior odors, and new car odors. 5Premium Supplement: Compared to replacing an entire fragrance system or buying a product such as a fragrance spray, choosing a refill can be more convenient and automated.