POTAUTO MAP 3005C (CF10368) Activated Carbon Car Cabin Air Filter Replacement for AUDI, A4, A6, Allroad Quattro, RS6, RS4, S4, S6 Spec.: 11.81" (Length), 7.95" (Width), 1.22" (Height); Four-layer fabric (One Carbon Layer) ; Installation instructions included. Applications Where Used: AUDI (A4 09-02, A4 Quattro 09-02, A6 04-99, A6 Quattro 04-01, Allroad Quattro 05-01, RS4 08-07, RS6 04-03, S4 09-04, S6 03-02) (See Amazon Part Finder for fitments to your cars) Benefits: (1) Reducing at least 98% of these contaminants (Dust, Pollen, Exhaust Gas, 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 absorbingthe airborne agents & allergens. (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 AQ1082C, ATP RA-53, VA-3, BECK/ARNLEY 042-2148, BOSCH P3876, CHAMP CAF7796, G K INDUSTRIES CF1053, HASTINGS AF1209, AF1230, AFC1209, AFC1230, KLEENER CAF1796, CAF7796, LUBER-FINER CAF7796, PARTS MASTER 94765, 94866, PRONTO PC-5484, PUROLATOR C35484, STP CAF7796, VW-AUDI-PORSCHE 4B0 819 439C, 8E0 819 439, Ecogard XC35484C, TYC 800145C, MANN CUK3037, Luber-finer CAF7796, FRAM CF10368 *** 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.