This is a CAR CABIN FILTER R2336 1987432336 with activated carbon. It has a length of 660mm, width of 95mm, and height of 20mm. It is compatible with various BMW models including 3 Limousine (E46), 3 Touring (E46), X3 (E83), 3 Coupe (E46), 3 Cabrio (E46), and 3 Compact (E46) from construction years ranging from April 1998 to August 2010. The filter protects against fine particles, noxious gases like ozone and exhaust emissions, and foul-smelling gases. It also reduces windshield mist and protects the air conditioning system from dust and dirt. Installation is simple, but should be performed by trained specialists. Please verify compatibility with your vehicle's identification.