Shop Buick Century Secondary Air Injection Pump (Right). 3.9 LITER. Lucerne; 3.9L. Air Injection EMISSION, System, LITER - OEM Buick Part # 12621090

Pump. Assembly - SECD Air INJN (W/ BRKT). Secondary Air Injection. Smog.
An emissions component, that is part of the Secondary Air Injection system, which is responsible for Pumping clean Air into the vehicle's exhaust stream to promote a cleaner and more complete burn before the fumes exit the tailpipe.

Secondary Air Injection Pump

Fits Lucerne

3.9 LITER. Lucerne; 3.9L.
Air Injection System Air Pump - Repair or Replace
A failed air injection pump or secondary air pump 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.