This 1109010-H12C0 air filter assembly is the complete engine air intake cleaner for Dongfeng heavy trucks. It adopts two-stage filtration structure, including primary filter and safety inner filter. It effectively blocks dust, sand and debris from entering the engine, protects engine cylinders, pistons and crankshaft components from abrasive wear, keeps stable engine power and reduces fuel consumption. The housing is made of reinforced composite material, with good sealing and anti-vibration performance, suitable for long-distance heavy load and all-weather working conditions. Each assembly undergoes air tightness, dust holding and filtration efficiency tests before delivery. It is an essential replacement spare part for Dongfeng truck engine intake system maintenance.