ECOGARD XA5566 Premium Engine Air Filter Fits Ford Five Hundred, Freestyle / Mercury Montego COMPATIBLE with 2005-2007 Ford Five Hundred, 2005-2007 Ford Freestyle, 2005-2007 Mercury Montego. IMPROVE PERFORMANCE by changing your vehicle's air filter at least every 12,000 miles (or as recommended in your car owner's manual); to ensure your vehicle's engine has the clean and efficient air flow it needs for fast acceleration and long term power. AVOID INCREASED ENGINE WEAR caused by dirty air intake filters that may allow damaging particles to get into the engine. FACTORY FIT FOR EASY INSTALLATION. Replaces: FRAM CA9944 Purolator A25566 WIX 46924 Motorcraft FA1771 OE 5F9Z-9601AA. SPECIFICALLY ENGINEERED AND TESTED for Ford, Mercury OE (original equipment) engine air filter's fit, form, and function.