Oxygen Sensor Replacement Estimate for Infiniti QX4

Infiniti QX4 Oxygen Sensor Replacement costs $171 on average. Following is a breakdown of the labor and parts estimates.

Skip the repair shop - our mechanics come to you
YourMechanic Price
$135 to $257
Labor: $70 -$144
Parts: $65 -$113
Average Dealer price
$223 to 393
Average Shop price
$164 to 291
Get an instant quote for your car
Our mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%
Get a quote
CarServiceYourMechanic PriceShop/Dealer Price
2000 Infiniti QX4V6-3.3LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$140.03Shop/Dealer Price$182.94 - $254.52
1999 Infiniti QX4V6-3.3LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$138.73Shop/Dealer Price$181.44 - $252.14
1998 Infiniti QX4V6-3.3LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$138.73Shop/Dealer Price$181.37 - $252.00
2003 Infiniti QX4V6-3.5LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$174.38Shop/Dealer Price$225.96 - $323.37
2001 Infiniti QX4V6-3.5LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$247.92Shop/Dealer Price$324.17 - $449.93
2001 Infiniti QX4V6-3.5LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$176.35Shop/Dealer Price$228.34 - $327.15
1997 Infiniti QX4V6-3.3LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$140.35Shop/Dealer Price$183.50 - $255.43
2003 Infiniti QX4V6-3.5LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$245.66Shop/Dealer Price$321.52 - $445.72
Show example Infiniti QX4 Oxygen Sensor Replacement prices
i
Have a car question? Get free advice from our top-rated mechanics.

Parts required for a Infiniti QX4 Oxygen Sensor Replacement

Meet some of our expert Infiniti mechanics

Real customer reviews from Infiniti owners like you.

471 reviews
Peter
38 years of experience
2002 INFINITI QX4 - OIL CHANGE
Want Peter's expert advice? Ask your question now. Its free!
112 reviews
Rod
12 years of experience
Rod was punctual, professional, and did a great job!
2006 INFINITI G35 - CAMSHAFT POSITION SENSOR REPLACEMENT
Want Rod's expert advice? Ask your question now. Its free!
64 reviews
Brian
8 years of experience
Working with Brian Z. was a 10 out of 10 experience. It was my first use of YourMechanic.com, and it will not be the last so long as he's on the case. Brian came by on time and quickly changed out both my rear differential and my power steering fluids. Along the way, he accurately noted the other areas where the car needed future maintenance. Brian's love for this work shines through in his professionalism and abundant knowledge, in particular of Nissan products. I will be asking for him from now on for my car repair needs!
2006 INFINITI G35 - DIFFERENTIAL FLUID SERVICE (REAR AXLE OIL SERVICE)
Want Brian's expert advice? Ask your question now. Its free!
54 reviews
Kenneth
11 years of experience
Ken showed up on time, was very helpful, friendly and did a great job. Would use him again any time.
2013 INFINITI G37 - BRAKE PADS REPLACEMENT (REAR)
Want Kenneth'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 Infiniti Models