TYC 800054C BMW Z4 Roadster Replacement Cabin Air Filter OE-comparable configuration as either Particle filter (single-stage) or Combination filter (with additional carbon layer to remove odor) Easy to install onto most vehicles within 7 minutes; installation instruction included with each unit Eliminates nearly 100% of exhaust pollutants and airborne contaminants Enables peak operating efficiency of the vehicles heating/air conditioning system Provides clean air for you and your passengers; recommended replacement interval: every 12,000 miles