Shop 1990 Buick Century Exhaust Gas Recirculation (EGR) Valve. 3.5 liter. Pacifica; 3.5L. EGR Valve - Combustion, Emission - OEM Buick Part # 4861579AH (04861579AH, 4861579AG)

Exhaust Gas Recirculation (EGR) Valve.
A Valve used to recirculate small amounts of Exhaust back into the combustion chambers of the engine in order to decrease the combustion temperature, thereby reducing the formation of smog-producing nitrogen oxides.

EGR Valve

Fits Pacifica

3.5 liter. Pacifica; 3.5L.
EGR Valve - Repair or Replace
A failed EGR valve will often have no noticeable symptoms beyond a check engine light, but it does cause your to operate inefficiently and produce higher emissions. Our technicians have access to manufacturer-approved repair processes and genuine parts.