Genuine OEM Audi Reduction Agent Injector, part number 04L131113P. This component is crucial for modern emissions control systems, injecting a precise amount of reduction agent (such as AdBlue/DEF) into the exhaust stream. This process facilitates the conversion of harmful nitrogen oxides (NOx) into harmless nitrogen and water vapor within the selective catalytic reduction (SCR) system. Weighing approximately 0.232 kg, this injector assembly includes a hose and electrical connector. Using a genuine OEM injector ensures accurate dosing, proper spray pattern, and resistance to crystallization for efficient emissions reduction and system longevity.