Mazda Navajo Oxygen Sensor Replacement at your home or office.

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received a Oxygen Sensor Replacement.
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$128.53 - $254.95

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Average rating from customers who
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Oxygen Sensor Replacement Estimate for Mazda Navajo

Mazda Navajo Oxygen Sensor Replacement costs $200 on average.

CarServiceEstimateShop/Dealer Price
1993 Mazda NavajoV6-4.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$279.15Shop/Dealer Price$339.47 - $493.93
1991 Mazda NavajoV6-4.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$182.07Shop/Dealer Price$218.18 - $299.87
1993 Mazda NavajoV6-4.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$419.91Shop/Dealer Price$513.51 - $769.29
1992 Mazda NavajoV6-4.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$279.15Shop/Dealer Price$341.21 - $496.97
1994 Mazda NavajoV6-4.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$414.91Shop/Dealer Price$508.01 - $763.41
1991 Mazda NavajoV6-4.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$249.95Shop/Dealer Price$299.88 - $430.11
1994 Mazda NavajoV6-4.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$284.15Shop/Dealer Price$343.09 - $496.52
1992 Mazda NavajoV6-4.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$409.91Shop/Dealer Price$503.38 - $759.07
Show example Mazda Navajo Oxygen Sensor Replacement prices

Oxygen Sensor Replacement Service

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

When replacing the oxygen sensor remember:

  • 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 replacing the oxygen sensor?

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.

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Meet some of our expert Mazda mechanics

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YourMechanic Mazda Oxygen Sensor Replacement Service

Average Rating

4.8/5

Number of Reviews

33

Rating Summary
31
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0
1
31
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1

Doug

32 years of experience
139 reviews
Doug
32 years of experience
Mazda 929 - Oxygen Sensor Replacement (Front/Upper/Upstream) - Corona, California
DXCELLENT AND VERY KNOWLEDGEABLE

Todd

11 years of experience
44 reviews
Todd
11 years of experience
Mazda 6 - Oxygen Sensor Replacement (Front/Upper/Upstream) - Beaverton, Oregon
Todd was on time and even early. He was quick but got everything done as needed. Thank You:)

Gerron

32 years of experience
170 reviews
Gerron
32 years of experience
Mazda 3 - Oxygen Sensor Replacement (Rear/Lower/Downstream) - Vancouver, Washington
Gerron completed repairs based on diagnostics today. I believe he's figured out the problem with CEL that's been causing me headaches for months. I really appreciate him answering all my questions, explaining/showing me the cause of the problem, the remedy and how it all works. That is real important to me. Something you rarely get from an Auto Shop. He did a great job and I feel confident if something might still come up he's got my back. Very cool...

Chris

14 years of experience
414 reviews
Chris
14 years of experience
Mazda Protege5 - Oxygen Sensor Replacement (Front/Upper/Upstream) - San Francisco, California
Awesome! Fast!

Excellent Rating


YourMechanic Mazda Oxygen Sensor Replacement Service

Average Rating

4.8/5

Number of Reviews

33

Rating Summary
31
1
0
0
1
31
1
0
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1
Red-stars EXCELLENT RATING ON
Number of Mazda Oxygen Sensor Replacement services completed
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services done by our mechanics
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