ECOGARD XA5704 Premium Engine Air Filter Fits BMW X3, Z4, X4 COMPATIBLE with 2007-2015 BMW X3, 2007-2009 BMW Z4, 2015 BMW X4. 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 CA10324 Purolator A35704 WIX 49468 OE 13 71 7 542 545. SPECIFICALLY ENGINEERED AND TESTED for BMW OE (original equipment) engine air filter's fit, form, and function.