Mercury Tracer Oxygen Sensor Replacement at your home or office.

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Oxygen Sensor Replacement Service

How much does a Oxygen Sensor Replacement cost?

On average, the cost for a Mercury Tracer Oxygen Sensor Replacement is $144 with $49 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
1992 Mercury TracerL4-1.8LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$546.43Shop/Dealer Price$664.29 - $995.37
1993 Mercury TracerL4-1.8LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$250.05Shop/Dealer Price$298.83 - $422.64
1999 Mercury TracerL4-2.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$251.69Shop/Dealer Price$300.88 - $425.92
1996 Mercury TracerL4-1.8LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$293.09Shop/Dealer Price$352.61 - $508.68
1999 Mercury TracerL4-2.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$277.35Shop/Dealer Price$332.97 - $477.27
1990 Mercury TracerL4-1.6LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$686.83Shop/Dealer Price$844.81 - $1296.20
1997 Mercury TracerL4-2.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$256.69Shop/Dealer Price$305.75 - $430.68
1991 Mercury TracerL4-1.9LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$216.53Shop/Dealer Price$255.92 - $351.02
Show example Mercury Tracer Oxygen Sensor Replacement prices

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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Rating Summary
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Allen

36 years of experience
471 reviews
Allen
36 years of experience
Mercury Tracer L4-2.0L - Alternator Belt - Daytona Beach, Florida
Allen is very Knowledgeable and he was able to fix my issue without any complications. He will definitely be my Master Mechanic for auto problems in the future.

Chris

16 years of experience
18 reviews
Chris
16 years of experience
Mercury Tracer L4-2.0L - Bleed Brakes - Dallas, Texas
Very quick, this is the second time, Chris has worked on my car. I can not express my gratitude at how professional he is. I will gladly book Chris if further work is need on my car.

Cesar

9 years of experience
292 reviews
Cesar
9 years of experience
Mercury Tracer L4-1.9L - Starter - Snohomish, Washington
Cesar was timely and friendly,he helped to show me how to put in a starter relay, after he had installed a new starter...the car still did not turn over..which was costly on my part. Next time, when I have a car that won't start, is to have it towed to the automotive shop !!

Adam

16 years of experience
64 reviews
Adam
16 years of experience
Mercury Tracer L4-2.0L - Brake Master Cylinder - Dallas, Texas
Adam was very professional, polite, had a great attitude even when it was learned he would need to return the day after to continue with the repair. Through no fault of his own as another part was needed. He is a very hard worker never stopping for breaks, although he had previously worked other jobs before mine. Hope you all understand you have a great mechanic here. Thanks for sending him for my repair, I will make sure to request him again and tell all of my friends. Good Job, your mechanic.

Excellent Rating

(23)

Rating Summary
22
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Number of Mercury Tracer services completed
253+
services done by our mechanics
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600+
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