POTAUTO MAP 1035C (CF10916) Activated Carbon Car Cabin Air Filter Replacement for BMW, Z4 Spec.: 9.69" (Length), 9.06" (Width), 1.18" (Height); Four-layer fabric (One Carbon Layer) ; Installation instructions included. Applications Where Used: BMW Z4 15-03 (See Amazon Part Finder for fitments to your cars) Benefits: (1) Reducing at least 98% of these contaminants (Dust, Pollen, Exhaust Gas, Bacteria, Particles of 5-100 microns...etc.) from the air passing through the filter & entering the interior of the vehicle. (2) Activated carbon cabin filter provide extra protection by absorbing Adsorbing the airborne infectious agents & allergens, which aggravate respiratory diseases. (3) Increase safety through reduced deposits in the fan or on the windscreen, and protect HVAC air conditioning performance. Competitor Cross Reference Part Numbers (for reference only, please check size): AIR QUALITEE AQ1075C, ATP CF-90 RA-47, Beck/ Arnley 042-2098, BMW 64 31 9 195 194, BOSCH C3856, DENSO 454-2001, Hastings AFC1425, MANN FILTER CUK2339, MICRON-AIR BM03144C, Purolator C45128, TYC 800054C, Wix 24518, 03-15 BMW Z4 3.0L-L6 ***Change filter every 12 months or 12, 000-15, 000 miles. Check & replace filter if peculiar smell / odors emit from the cabin air outlets, or if the vehicle HVAC system operates with poor performance, or humming, or weak air volume. ***LEGAL DISCLAIMER: The Brand name & Model # (if listed) are for cross reference only. All Brands, Trademarks & Model Numbers remain the property of their respective owners.