Mercury Mariner Oxygen Sensor Replacement at your home or office.

Our certified mechanics come to you・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing
Logo-yelp
CUSTOMERS LOVE US ON YELP
4.5 out of 5 (550 reviews)
Icon-warranty_badge-02
SERVICES BACKED BY OUR
12-Month, 12,000-Mile Warranty
How does YourMechanic work?    
Icon-quote-hiw
Get a quote

Choose from 600+ repair, maintenance, and diagnostic services, backed by our 12-month, 12,000-mile warranty.

Icon-calendar-hiw
Book an appointment

Tell us when to meet you at your home or office. We’ll send one of our vetted, top-rated mechanics.

Icon-fixed-hiw
Get your car fixed

Continue with your day while our mechanic fixes your car onsite. You pay only after the job is done.

Oxygen Sensor Replacement Estimate for Mercury Mariner

Mercury Mariner Oxygen Sensor Replacement costs $157 on average. Following is a breakdown of the labor and parts estimates.

YourMechanic Price
$123 to $361
Labor: $70 -$80
Parts: $53 -$281
Average Dealer price
$200 to 655
Average Shop price
$150 to 434
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
2007 Mercury MarinerV6-3.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$176.82Shop/Dealer Price$218.05 - $309.05
2008 Mercury MarinerL4-2.3L HybridService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$176.82Shop/Dealer Price$218.11 - $309.17
2005 Mercury MarinerV6-3.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$177.70Shop/Dealer Price$219.17 - $310.85
2009 Mercury MarinerL4-2.5L HybridService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$631.56Shop/Dealer Price$786.51 - $1218.61
2011 Mercury MarinerL4-2.5L HybridService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$244.16Shop/Dealer Price$302.23 - $443.75
2006 Mercury MarinerL4-2.3LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$195.82Shop/Dealer Price$241.79 - $347.04
2011 Mercury MarinerL4-2.5LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$382.32Shop/Dealer Price$475.01 - $720.20
2009 Mercury MarinerV6-3.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$176.82Shop/Dealer Price$218.11 - $309.16
Show example Mercury Mariner 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.

GET A QUOTE FOR YOUR CAR
Backed by 12-month, 12,000-mile guarantee

Meet some of our expert Mercury mechanics

Real customer reviews from Mercury owners like you.

390 reviews
Richard
17 years of experience
The part had not yet arrived on the day of service and Richard called me first thing in the morning to let me know. He kept in touch with me and was on the lookout for the part. He arrived only 30 min after the appointment time with the part! He quickly installed my fuel pump and was on his way. I later found out there was another issue with the car, which hadn't been diagnosed before (he had not done the initial diagnosis) and he quickly came back out to take a look at it. Throughout the process Richard has been polite and understanding.
2003 MERCURY GRAND MARQUIS - FUEL PUMP REPLACEMENT
308 reviews
Peter
32 years of experience
Very polite and knowledgable
1997 MERCURY MOUNTAINEER - OIL/FLUID LEAK INSPECTION
176 reviews
Christopher
23 years of experience
Christopher is a very professional and knowledgeable mechanic. He is amazing!
1998 MERCURY GRAND MARQUIS - OTHER INSPECTIONS
91 reviews
Michael
21 years of experience
Without a doubt Michael is the best mechanic in Charlotte!!! He showed up an Hour early for my appointment because he knew everything I was going through was last minute and wanted to get to me as soon as possible!! My car was stranded at a friend's house and was not there when he arrived but he basically completed my service by the time I had arrived (still 40 minutes before my scheduled time) and was nice enough to look at my friends car while he was waiting on my keys to finish up with my appointment!! My friend needed almost 3 bottles of transmission fluid because it was so empty and Michael happily filled his transmission with fluid he had on him...Free of charge!! And diagnosed my friends car with his recommendations for that as well. Honestly can not say how how I am Michael is my Only mechanic!! He is probably the nicest guy ever, comes Fully equipped with everything possibly needed for mechanics, is extremely informative, best person I have met at timeliness, and is 100% trustworthy!!! If you have the luxury or getting Michael consider yourself lucky!!! Great great great guy!!!!
2006 MERCURY MARINER - BRAKE HOSE REPLACEMENT (DRIVER SIDE FRONT, PASSENGER SIDE FRONT)
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
2007 Mercury MarinerV6-3.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$176.82Shop/Dealer Price$218.05 - $309.05
2008 Mercury MarinerL4-2.3L HybridService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$176.82Shop/Dealer Price$218.11 - $309.17
2005 Mercury MarinerV6-3.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$177.70Shop/Dealer Price$219.17 - $310.85
2009 Mercury MarinerL4-2.5L HybridService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$631.56Shop/Dealer Price$786.51 - $1218.61
2011 Mercury MarinerL4-2.5L HybridService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$244.16Shop/Dealer Price$302.23 - $443.75
2006 Mercury MarinerL4-2.3LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$195.82Shop/Dealer Price$241.79 - $347.04
2011 Mercury MarinerL4-2.5LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$382.32Shop/Dealer Price$475.01 - $720.20
2009 Mercury MarinerV6-3.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$176.82Shop/Dealer Price$218.11 - $309.16
Show example Mercury Mariner Oxygen Sensor Replacement prices

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1-800-701-6230 · hi@yourmechanic.com