Shop 2012 Cadillac Escalade EXT Oxygen Sensor (Rear, Lower). 3.9 LITER. Lucerne; Rear; 3.9L. Oxygen EMISSION, LITER, Make - OEM Cadillac Part # 12622643

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

Oxygen Sensor

Fits Lucerne

3.9 LITER. Lucerne; Rear; 3.9L.
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.