Oxygen Sensor Replacement at your home or office.

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Oxygen Sensor Replacement Estimate for Infiniti FX45

Infiniti FX45 Oxygen Sensor Replacement costs $203 on average. Following is a breakdown of the labor and parts estimates.

YourMechanic Price
$150 to $303
Labor: $70 -$80
Parts: $80 -$223
Average Dealer price
$253 to 539
Average Shop price
$183 to 362
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
2005 Infiniti FX45V8-4.5LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$156.54Shop/Dealer Price$203.59 - $287.56
2007 Infiniti FX45V8-4.5LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$306.82Shop/Dealer Price$391.55 - $588.31
2008 Infiniti FX45V8-4.5LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$191.57Shop/Dealer Price$247.41 - $357.68
2005 Infiniti FX45V8-4.5LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$191.57Shop/Dealer Price$247.45 - $357.74
2007 Infiniti FX45V8-4.5LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$193.86Shop/Dealer Price$250.26 - $362.22
2006 Infiniti FX45V8-4.5LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$193.86Shop/Dealer Price$250.23 - $362.17
2004 Infiniti FX45V8-4.5LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$194.43Shop/Dealer Price$251.10 - $363.60
2006 Infiniti FX45V8-4.5LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$306.82Shop/Dealer Price$391.54 - $588.30
Show example Infiniti FX45 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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Meet some of our expert Infiniti mechanics

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450 reviews
Ben
36 years of experience
I could not be happier with Ben's work. He himself was professional and on time, but most importantly he did the work properly. I have sought automotive repair and maintenance from many sources including multiple dealers and I keep finding crooked and/or incompetent work being done, so it is a relief YourMechanic connected me with Ben. Having him come by and work on my car while I take care of my 4 month old and 3 year old daughters was a very big advantage, but the most important asset he brought was his decades of expertise in mechanical engineering. I cannot emphasize enough how hard it is to find someone who actually knows what they are doing. In the midst of a growing family and the responsibilities that come with it, having an honest go-to guy to take care of a large asset like my car is a huge relief. He helps me take care of my other baby.
2002 INFINITI I35 - OIL COOLER ADAPTER GASKET REPLACEMENT
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395 reviews
Tien
18 years of experience
Friendly and professinal
2008 INFINITI G35 - BRAKE PADS REPLACEMENT (REAR)
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64 reviews
Brian
8 years of experience
This was my third time using Brian. His attention to detail is amazing and is very thorough in his work. Thanks for taking care of my brakes!
2003 INFINITI G35 - BRAKE PADS REPLACEMENT (FRONT, REAR)
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31 reviews
Emmette
31 years of experience
Great professional Mechanic! On time and can diagnose any problem!
2002 INFINITI QX4 - ALTERNATOR REPAIR
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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
2005 Infiniti FX45V8-4.5LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$156.54Shop/Dealer Price$203.59 - $287.56
2007 Infiniti FX45V8-4.5LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$306.82Shop/Dealer Price$391.55 - $588.31
2008 Infiniti FX45V8-4.5LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$191.57Shop/Dealer Price$247.41 - $357.68
2005 Infiniti FX45V8-4.5LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$191.57Shop/Dealer Price$247.45 - $357.74
2007 Infiniti FX45V8-4.5LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$193.86Shop/Dealer Price$250.26 - $362.22
2006 Infiniti FX45V8-4.5LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$193.86Shop/Dealer Price$250.23 - $362.17
2004 Infiniti FX45V8-4.5LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$194.43Shop/Dealer Price$251.10 - $363.60
2006 Infiniti FX45V8-4.5LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$306.82Shop/Dealer Price$391.54 - $588.30
Show example Infiniti FX45 Oxygen Sensor Replacement prices

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