The Hitachi 4211471 is a genuine 12V dosing pump designed for exhaust aftertreatment systems in various Hitachi construction machinery. This critical component ensures the precise and controlled injection of Diesel Exhaust Fluid (DEF) or AdBlue into the exhaust stream, facilitating the Selective Catalytic Reduction (SCR) process to reduce harmful nitrogen oxide (NOx) emissions. Manufactured to OEM specifications, the 4211471 dosing pump provides reliable performance and maintains emission compliance for compatible Hitachi excavators and other heavy equipment.