Shop 2000 Buick Century Oxygen Sensor (Rear, Lower). 4.2 liter. All Models; 4.2L; Rear. Canyon, Colorado EMISSION, Liter, Make - OEM Buick Part # 12585999

Sensor. Oxygen.
Oxygen Sensor. Heated (O2) (POSN 2). Ft. Snsr.

Oxygen Sensor

Fits Canyon, Colorado, Envoy, Envoy XL, Rainier, Trailblazer, Trailblazer EXT

4.2 liter. All Models; 4.2L; Rear. Canyon, Colorado; w/o 5.3L; Rear.
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 to operate inefficiently and produce higher emissions. Our technicians have access to manufacturer-approved repair processes and genuine parts.