Shop 1989 Buick Century Secondary Air Injection Pump (Right). 5.7 liter. Air Injection System Air Pump Make, Repair - OEM Buick Part # 12555164

Pump. Assembly - SECD Air INJN. 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

5.7 liter.
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.