Oxygen Sensor Replacement Estimate for Cadillac STS

Cadillac STS Oxygen Sensor Replacement costs $185 on average. Following is a breakdown of the labor and parts estimates.

Skip the repair shop - our mechanics come to you
YourMechanic Price
$166 to $216
Labor: $70 -$80
Parts: $96 -$136
Average Dealer price
$285 to 364
Average Shop price
$203 to 253
Get an instant quote for your car
Our mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing
Get a quote
CarServiceYourMechanic PriceShop/Dealer Price
2009 Cadillac STSV8-4.6LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$173.75Shop/Dealer Price$225.10 - $321.98
2005 Cadillac STSV6-3.6LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$207.48Shop/Dealer Price$267.39 - $389.65
2010 Cadillac STSV6-3.6LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$176.93Shop/Dealer Price$229.11 - $328.40
2006 Cadillac STSV6-3.6LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$207.48Shop/Dealer Price$267.34 - $389.57
2010 Cadillac STSV8-4.6LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$173.75Shop/Dealer Price$225.12 - $322.01
2008 Cadillac STSV8-4.6LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$207.48Shop/Dealer Price$267.25 - $389.42
2009 Cadillac STSV8-4.6LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$208.12Shop/Dealer Price$268.21 - $390.97
2005 Cadillac STSV8-4.6LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$207.48Shop/Dealer Price$267.38 - $389.64
Show example Cadillac STS Oxygen Sensor Replacement prices

Parts required for a Cadillac STS Oxygen Sensor Replacement

Meet some of our expert Cadillac mechanics

Real customer reviews from Cadillac owners like you.

192 reviews
Chet
36 years of experience
2005 CADILLAC STS - AIR IS NOT COMING OUT OF VENTS INSPECTION
Want Chet's expert advice? Ask your question now. Its free!
37 reviews
Matthew
12 years of experience
Awesome &&& efficient!!!
2006 CADILLAC ESCALADE - COOLANT IS LEAKING INSPECTION
Want Matthew's expert advice? Ask your question now. Its free!
37 reviews
Tyler
22 years of experience
Tyler is a true professional! I look forward to future visits with Tyler and recommend his expertise on all of my vehicles.
2009 CADILLAC ESCALADE - BRAKE PADS REPLACEMENT (FRONT, REAR)
Want Tyler's expert advice? Ask your question now. Its free!
19 reviews
Alvin
10 years of experience
Honest and knowledgable
2011 CADILLAC SRX - ABS LIGHT IS ON INSPECTION
Want Alvin's expert advice? Ask your question now. Its free!

All about Oxygen Sensor Replacement

With each new model year, manufacturers are adding more oxygen sensors to better manage engine operation. Some high performance engines have an oxygen sensor for each cylinder as well as one for the rear of each catalytic convertor. The sensors are located either underneath the hood or underneath the car. The oxygen sensors are connected (screwed) to the exhaust pipe, either in front or back of the catalytic converter. The front (upstream) sensors measure the amount of oxygen in the exhaust system. The purpose of the front oxygen sensor(s) is to measure how rich or lean the gases are as the gases exit the combustion chamber. Depending upon whether the exhaust gas is lean (high in oxygen content) or rich (low in oxygen content), the amount of fuel entering the engine is adjusted by the engine management computer to try and maintain an ideal mixture that produces the lowest emissions output from the catalytic convertor. Rear (downstream) sensors are located behind the catalytic converter. The purpose of the rear oxygen sensor(s) is to monitor the oxygen content of the exhaust gases leaving the catalytic convertor. If one or more of the oxygen sensors are faulty, your car may not pass the emissions test. If you drive your car with a faulty oxygen sensor, you may get poor gas mileage and it can damage the catalytic converter.

Oxygen Sensor Replacement Estimates for Popular Cadillac Models