Lexus Air Filter 17801-31131 – Lexus ES300h/350 (2013–2018); NX200t (2015–2017); NX300/300h (2015–2021); RX350/350L/450h/450hL (2011–2022) restores crisp response with dense, precision-pleated media designed to maximize capture area while maintaining healthy airflow. OE-grade sealing surfaces prevent bypass dust and intake whistle, protecting sensors for stable fuel trims and efficient combustion. Moisture-stable frames maintain shape over long intervals. The drop-in, rattle-free design makes DIY replacement fast and reliable. Refresh at factory mileage—earlier in dusty climates—to preserve quiet operation, fuel economy, and the refined acceleration Lexus owners expect across these popular sedan and SUV platforms.