Doser Injector 4387109

The Cummins Doser Injector (4387109) is a component used in diesel engine exhaust aftertreatment systems to inject Diesel Exhaust Fluid (DEF) into the exhaust stream. It facilitates the chemical reduction of nitrogen oxides (NOx) emissions by delivering precise quantities of DEF for emissions control. This injector operates within the selective catalytic reduction (SCR) system to support regulatory compliance and emissions management.