This thermostat housing assembly 19503‑RAA‑A01 is an important cooling‑system housing component mounted on engine cylinder head. It accommodates thermostat element, guides coolant circulation path and ensures stable temperature‑control operation for Honda Accord CM4 CM5 CM6, CR‑V RE4 and Acura TSX CU2 equipped with K24A / K24Z 2.4L engine from 2003‑2014. Constructed with high‑strength heat‑resistant engineering‑plastic housing, integrated sealing mating surface. It delivers outstanding heat‑resistance, anti‑deformation and anti‑aging performance under long‑term high‑temperature coolant‑circulation environment. All bolt‑hole layout, pipe‑port dimension and inner‑chamber structure strictly comply with OEM specifications. Every unit passes pressure‑leakage test and high‑temperature aging inspection before shipment for direct bolt‑on installation without extra modification. Common failure symptoms include coolant leakage from thermostat housing joint, slow engine warm‑up, unstable engine operating temperature. It is widely replaced during cooling‑system and thermostat overhaul, serving as essential repair spare‑part for Honda K24 series gasoline engine maintenance.
