Oxygen Sensor Replacement Estimate for Chevrolet Trailblazer EXT

Chevrolet Trailblazer EXT Oxygen Sensor Replacement costs $304 on average. Following is a breakdown of the labor and parts estimates.

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YourMechanic Price
$132 to $421
Labor: $70 -$296
Parts: $62 -$125
Average Dealer price
$218 to 594
Average Shop price
$161 to 464
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CarServiceYourMechanic PriceShop/Dealer Price
2002 Chevrolet Trailblazer EXTL6-4.2LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$138.73Shop/Dealer Price$170.43 - $232.87
2002 Chevrolet Trailblazer EXTL6-4.2LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$136.19Shop/Dealer Price$167.32 - $227.90
2004 Chevrolet Trailblazer EXTL6-4.2LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$326.46Shop/Dealer Price$397.14 - $488.09
2005 Chevrolet Trailblazer EXTL6-4.2LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$325.19Shop/Dealer Price$395.62 - $485.68
2003 Chevrolet Trailblazer EXTL6-4.2LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$326.43Shop/Dealer Price$397.06 - $487.96
2003 Chevrolet Trailblazer EXTL6-4.2LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$327.73Shop/Dealer Price$398.62 - $490.45
2004 Chevrolet Trailblazer EXTL6-4.2LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$326.74Shop/Dealer Price$397.72 - $489.07
2004 Chevrolet Trailblazer EXTV8-5.3LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$336.64Shop/Dealer Price$410.02 - $508.73
Show example Chevrolet Trailblazer EXT Oxygen Sensor Replacement prices

Parts required for a Chevrolet Trailblazer EXT Oxygen Sensor Replacement

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Real customer reviews from Chevrolet owners like you.

450 reviews
Ben
36 years of experience
Ben was great! Very nice, and great service.
2006 CHEVROLET COBALT - OXYGEN SENSOR REPLACEMENT (REAR/LOWER/DOWNSTREAM)
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308 reviews
Dan
34 years of experience
Just a great person with integrity and morals. Recommend to anyone.
1996 CHEVROLET K1500 - OXYGEN SENSOR REPLACEMENT (FRONT/UPPER/UPSTREAM, REAR/LOWER/DOWNSTREAM)
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112 reviews
Shaun
16 years of experience
Shaun was punctual and very knowledgeable, he went to fix and replaced the rear brake pads right away. no hesitations on his part, meaning he knows what he's doing. i would recoomend him to anyone needing work or their vehicle.
2002 CHEVROLET TRAILBLAZER - BRAKE PADS REPLACEMENT (REAR)
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97 reviews
Shaun
11 years of experience
Mr. Davis was excellent. It was a stress free appointment. He arrived two hours early. He had open communication; informed me that he had to step away to go down the block to get another part. Very respectful. He addressed all my concerns. Uploaded pictures and voice notes to my inspection report so I knew what was found and being done to my car. I will definitely book him for other services my car may need.
2007 CHEVROLET COBALT - TRANSMISSION FLUID SERVICE
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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.

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