Buy 1997 Buick Century Oxygen Sensor (Rear). 4.2 LITER. All Models; 4.2L; Front. Oxygen Sensor - EMISSION, Liter, Make - OEM Buick Part # 12586996

Sensor. Oxygen. Heated (O2) (POSN 1). Ft.
Oxygen Sensor.

Oxygen Sensor

Fits Bravada, Envoy, Envoy XL, Envoy XUV, Rainier, Trailblazer, Trailblazer EXT

4.2 LITER. All Models; 4.2L; Front.
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 1997 Buick Century to operate inefficiently and produce higher emissions. Our technicians have access to manufacturer-approved repair processes and Buick genuine parts.