BOSCH C3723WS Activated Charcoal Workshop Cabin Air Filter - Compatible With Select BMW X1, 1 M, 128i, 135i, 135is, 323i, 325i, 325xi, 328i, 328xi, 330Ci, 330i, 330xi, 335d, 335i, 335is, 335xi, Xdrive

Bosch Premium Cabin Filters absorb up to 100% of all pollen, dust particles and harmful substances. This results in a noticeable improvement in the air quality inside the vehicle. Bosch Activated Charcoal Filters go one step further than Particulate Filters. Bosch Activated Charcoal Cabin Air Filters have a 5-layer design that includes an additional carbon layer that absorbs toxic and foul-smelling gases such as ozone, nitrogen oxide, sulfur dioxide and hydrocarbons, and an additional cover layer for extra protection.