OE number: 161842. Citroen C4, C5 2.0 HDi. Peugeot 307, 407 2.0 HDi. Peugeot and Citroen Turbo Pressure Solenoid Valve. Turbo Pressure Solenoid Valve. – Warranty only covered for the parts. The warranty does not cover any issues that are caused by improper installation of the product.