Hummer H3 Oxygen Sensor Replacement at your home or office.

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Oxygen Sensor Replacement Estimate for Hummer H3

Hummer H3 Oxygen Sensor Replacement costs $160 on average. Following is a breakdown of the labor and parts estimates.

YourMechanic Price
$141 to $196
Labor: $70 -$80
Parts: $71 -$116
Average Dealer price
$235 to 326
Average Shop price
$172 to 229
Get an instant quote for your car
Our mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing
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CarServiceEstimateShop/Dealer Price
2009 Hummer H3V8-5.3LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$237.96Shop/Dealer Price$294.47 - $431.33
2009 Hummer H3V8-5.3LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$237.96Shop/Dealer Price$294.54 - $431.45
2006 Hummer H3L5-3.5LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$302.76Shop/Dealer Price$375.49 - $560.97
2008 Hummer H3V8-5.3LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$237.96Shop/Dealer Price$294.51 - $431.41
2010 Hummer H3V8-5.3LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$237.96Shop/Dealer Price$294.48 - $431.35
2006 Hummer H3L5-3.5LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$211.56Shop/Dealer Price$261.47 - $378.52
2008 Hummer H3V8-5.3LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$237.96Shop/Dealer Price$294.56 - $431.48
2009 Hummer H3L5-3.7LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$302.76Shop/Dealer Price$375.54 - $561.04
Show example Hummer H3 Oxygen Sensor Replacement prices

Oxygen Sensor Replacement Service & Cost

What is the Oxygen Sensor all about?

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-MATROX-1

Keep in mind:

  • Many oxygen sensors are damaged by leaking oil or coolant. If that is the case, the cause of that leak needs to be identified and repaired, or else the replacement oxygen sensor will be damaged as well.
  • New vehicles require specific oxygen sensors, and not the universal sensors that were common prior to 1996.

How it's done:

  • Scan the computer in the car for codes.
  • Inspect for vacuum leaks and holes in the exhaust system.
  • Remove and replace the oxygen sensor if it is bad.
  • Check electrical connections.
  • Check for proper operation of oxygen sensors.
  • Clear diagnostic codes.
  • Test drive car.

Our recommendation:

Keep up with the tune-ups. If check engine light is on, don't drive the car too long without getting it inspected. If check engine light is flashing, pull over and get the car towed to avoid costly repairs. Ask the mechanic to inspect the vacuum hoses and leaks in the exhaust system. If the vacuum hose or exhaust system is leaking, it will display an oxygen sensor fault code. Replacing an oxygen sensor may not fix the problem.

What common symptoms indicate you may need to replace the Oxygen Sensor?

  • Check Engine light is on.
  • Car is getting poor gas mileage.
  • Emission test fails.

How important is this service?

Your vehicle has multiple oxygen sensors, and they all help the car run optimally. The front sensors measure how much oxygen is in the exhaust stream to measure how rich or lean the gases leaving the gas chamber are. The rear sensors measure the oxygen content of the gases as they leave the catalytic converter. The oxygen sensors then relay this information to your vehicle’s electronic control unit, so that it can adjust as necessary. Because cars depend on an ideal fuel-to-air ratio to function optimally, the oxygen sensors are leaned on for engine performance. When your oxygen sensors fail your car will run less smoothly, get worse mileage, and have worse emissions.

Fast and easy Oxygen Sensor Replacement service at your home or office.

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Excellent Rating


Hummer H3 Repair

Average Rating

4.8/5

Number of Reviews

51

Rating Summary
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Meet some of our expert Hummer mechanics

Real customer reviews from Hummer owners like you.

Lucas

13 years of experience
555 reviews
Lucas
13 years of experience
2006 HUMMER H3 - BATTERY - VAN NUYS, CALIFORNIA

Alex

12 years of experience
318 reviews
Alex
12 years of experience
Alex was professional. Showed up on time. And he is really honest. I thought my starter went out in my 2008 H3 Hummer. Come to find out my battery Had a dead cell. Before he started he analyzed the problem and helped me save money. I will definitely use him again. This guy is probably the most honest person I've met. And he is really knowledgeable to be so young. Thanks.
2008 HUMMER H3 - BASIC INSPECTION - GARLAND, TEXAS

Angelo

28 years of experience
76 reviews
Angelo
28 years of experience
Angelo was on time for the appointment, was very polite and very informative. He fixed my current issue and helped diagnose another problem I was having. I felt confident in his abilities and I feel he did a great job on my vehicle. I have already scheduled for him to fix an issue that another mechanic din't fix correctly. I would definitely call him for any future needs and I would recommend to others.
2006 HUMMER H3 - WATER PUMP - CARROLLTON, TEXAS

Dustin

9 years of experience
30 reviews
Dustin
9 years of experience
Dustin is confident and very professional
2007 HUMMER H3 - DRIVESHAFT - PASADENA, TEXAS
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
CarServiceEstimateShop/Dealer Price
2009 Hummer H3V8-5.3LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$237.96Shop/Dealer Price$294.47 - $431.33
2009 Hummer H3V8-5.3LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$237.96Shop/Dealer Price$294.54 - $431.45
2006 Hummer H3L5-3.5LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$302.76Shop/Dealer Price$375.49 - $560.97
2008 Hummer H3V8-5.3LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$237.96Shop/Dealer Price$294.51 - $431.41
2010 Hummer H3V8-5.3LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$237.96Shop/Dealer Price$294.48 - $431.35
2006 Hummer H3L5-3.5LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$211.56Shop/Dealer Price$261.47 - $378.52
2008 Hummer H3V8-5.3LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$237.96Shop/Dealer Price$294.56 - $431.48
2009 Hummer H3L5-3.7LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$302.76Shop/Dealer Price$375.54 - $561.04
Show example Hummer H3 Oxygen Sensor Replacement prices

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