Genuine OEM Audi Exhaust Gas Recirculation (EGR) Pipe, part number 03L131521AE. This critical pipe is part of the vehicle's emissions control system, specifically connecting components within the exhaust gas recirculation assembly. Its function is to route a portion of the exhaust gases back into the engine's intake, reducing nitrogen oxide (NOx) emissions. As shown in the diagram, it connects the EGR cooler to another part of the intake/exhaust path. Constructed from durable, heat-resistant metal, this pipe is designed to withstand extreme exhaust temperatures and pressures. Choosing a genuine OEM EGR pipe ensures precise fitment, correct flow characteristics, and long-term resistance to corrosion and thermal stress, which is essential for maintaining emissions compliance and engine pe...