For CITROEN C4 For PICASSO For GRAND C5 C8 For DISPATCH 2.0 D 959179 EGR Valve. Egr Function: Exhaust Gas Recirculation Is A Method Used To Reduce Harmful Emissions From The Engine, While Optimizing Combustion Efficiency And Protecting Our Engine. Helps to prevent engine knocking and overheating by reducing combustion temperatures, contributing to smoother engine operation and enhanced fuel efficiency. EGR Valve is a reliable and durable replacement part that ensures your engine runs smoothly and efficiently. When it comes to maintaining the performance and efficiency of your vehicle, one of the most critical components to keep in top condition is the Exhaust Gas Recirculation (EGR) Valve., Manufacturer: HUIXINQ