This is a Bosch Activated Carbon Cabin Filter, designed as a 2-part set for BMW 5 Series (E60, E61) and 6 Series models. Please use the make and model tool to confirm compatibility with your vehicle. If you are unsure, contact us for assistance. The filter has a length of 320 mm, a height of 31 mm, and a width of 173 mm. It is an Activated Carbon Filter, also known as a Filter Insert, and the highly efficient version has part number 0986628618. The basic version part number is 1987435184. The type is Filter, cabin air. Cross-references include ALCO FILTER MS6299C, COMLINE EKF158A, COOPERS PCK8168, CORTECO 21653064, DELPHI TSP0325212, FILTRON K1160A, FRAM CFA101032, HELSA-AUTOMOTIVE KF 005, and HENGST FILTER E1909 LC, E2963L.