Genuine OEM Audi AdBlue Injector, part number 4H0131113E. This critical component is responsible for accurately injecting AdBlue (Diesel Exhaust Fluid) into the exhaust stream, facilitating the reduction of nitrogen oxides in the selective catalytic reduction (SCR) system. It is located within the exhaust system, typically before the SCR catalyst. Weighing 0.235 kg, this injector is engineered for precise dosing. Choosing a genuine OEM injector ensures accurate spray patterns and flow rates, which are essential for optimal emissions reduction and preventing system faults.