Shop OEM GENERAL MOTORS Part # 12601266. Oxygen Sensor (Rear). 3.6. 3.6 liter, auto trans. CTS; Rear; Left. STS, STS-V; 3.6L; Rear; Left. Oxygen Sensor - Repair or Replace A

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

Oxygen Sensor

Fits CTS, STS

3.6. 3.6 liter, auto trans. CTS; Rear; Left. STS, STS-V; 3.6L; Rear; Left.
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.