Auto Engine Air Filter OEM 17801-31090

Features of Engine Air Filter 17801-31090

This OEM-spec engine air filter model 17801-31090 is customized for Prado 4000 and Land Cruiser 4.0, equipped with premium functional features to suit off-road, highway and daily urban driving scenarios. It features OEM-standard precise dimensional molding. All outlines, sealing frames and fixing buckles comply with original factory standards, supporting direct plug-and-play installation without cutting or adjustments. The high-density elastic rubber sealing strip closely fits the air filter housing to stop unfiltered air leakage, stopping abrasive grit from scratching internal engine cylinders. Its core is multi-layer composite high-efficiency filter media. The dual-density fiber structure uses outer coarse layers to block leaves, sand and gravel, while dense inner microfibers capture fine dust and tiny particles. It balances powerful filtration and steady airflow, resisting fast clogging on dusty mountain, desert and construction routes ideal for large off-road vehicles. Built-in reinforced support grids prevent deformation under strong intake airflow during acceleration and climbing. The filter paper carries a waterproof coating to withstand mud, splashes and humid weather, avoiding softening, mold or collapse of the filter body. Stable clean air delivery optimizes the 4.0L naturally aspirated powertrain’s air-fuel ratio, boosting throttle sensitivity and lowering excess fuel consumption. It reduces abrasion of pistons and valves to prolong engine lifespan and cut long-term maintenance costs. With a long service cycle of up to 15,000 kilometers under regular driving, it outperforms cheap universal filters. Reliable for heavy off-road use, it gains consistent recognition from off-road lovers and vehicle fleet operators.