Buy 2002 Buick Century Oxygen Sensor (Rear, Lower). Oxygen Sensor - Repair or Replace A failed Oxygen Post, Emissions - OEM Buick Part # 19178924 (12587214, 19178921, 25312196, AFS97)

Sensor. Oxygen.
Has 4-Way square connector. Oxygen Sensor. Assembly, Heated (O2). Ft. Snsr.

Oxygen Sensor

Oxygen Sensor - Repair or Replace
A failed Oxygen Sensor will often have no noticeable symptoms beyond a check engine light, but it does cause your 2002 Buick Century to operate inefficiently and produce higher emissions. Our technicians have access to manufacturer-approved repair processes and Buick genuine parts.