Shop 1992 Buick Century Exhaust Gas Recirculation (EGR) Valve. 4.6 liter. 7.4 liter, all. All Models; 4 Combustion - OEM Buick Part # 12578040 (17113713)

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

4.6 liter. 7.4 liter, all. All Models; 4.6L. All Models; 7.4L. Astro, Safari; 4.3L; Auto Trans; All; Vin Code Z; All. Aurora. G10-30 Vans; 7.4L. S-Series; 4.3L; TBI; Auto Trans. Seville.
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.