Mercury Monterey 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 Monterey

Mercury Monterey Oxygen Sensor Replacement costs $134 on average. Following is a breakdown of the labor and parts estimates.

YourMechanic Price
$123 to $157
Labor: $70 -$104
Parts: $53
Average Dealer price
$200 to 228
Average Shop price
$150 to 175
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 MontereyV6-4.2LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$176.82Shop/Dealer Price$218.05 - $309.05
2006 Mercury MontereyV6-4.2LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$176.82Shop/Dealer Price$218.11 - $309.17
2005 Mercury MontereyV6-4.2LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$176.82Shop/Dealer Price$218.07 - $309.09
2005 Mercury MontereyV6-4.2LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$197.82Shop/Dealer Price$243.46 - $337.77
2007 Mercury MontereyV6-4.2LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$197.82Shop/Dealer Price$243.42 - $337.70
2004 Mercury MontereyV6-4.2LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$176.82Shop/Dealer Price$218.04 - $309.04
2004 Mercury MontereyV6-4.2LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$197.82Shop/Dealer Price$243.51 - $337.87
2006 Mercury MontereyV6-4.2LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$197.82Shop/Dealer Price$243.49 - $337.82
Show example Mercury Monterey 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

Excellent Rating


Mercury Repair

Average Rating

4.7/5

Number of Reviews

6,149

Rating Summary
5,841
286
22
0
0
5,841
286
22
0
0

Meet some of our expert Mercury mechanics

Real customer reviews from Mercury owners like you.

Christopher

23 years of experience
181 reviews
Christopher
23 years of experience
Prompt, very polite, explains car issues well, very thorough.
2000 MERCURY GRAND MARQUIS - COOLANT IS LEAKING - VALRICO, FL

Alfredo

17 years of experience
123 reviews
Alfredo
17 years of experience
Alfredo was great, quick and offered advice on how I could care for my car further.
1999 MERCURY MOUNTAINEER - CAR STARTER REPAIR - SANFORD, FL

Kenneth

12 years of experience
112 reviews
Kenneth
12 years of experience
This is the second time Kenneth came and fix my second car. I highly recommend him because he'll tell you how it is explained every detail and broke it down for me to understand. I appreciate his work and time THANK YOU KENNETH
2001 MERCURY GRAND MARQUIS - CATALYTIC CONVERTER - SAN LEANDRO, CA

Eliseo

8 years of experience
81 reviews
Eliseo
8 years of experience
Very professional, friendly and prompt.
2005 MERCURY MOUNTAINEER - EXHAUST GAS RECIRCULATION/EGR VALVE - WILLIS, TX
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 MontereyV6-4.2LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$176.82Shop/Dealer Price$218.05 - $309.05
2006 Mercury MontereyV6-4.2LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$176.82Shop/Dealer Price$218.11 - $309.17
2005 Mercury MontereyV6-4.2LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$176.82Shop/Dealer Price$218.07 - $309.09
2005 Mercury MontereyV6-4.2LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$197.82Shop/Dealer Price$243.46 - $337.77
2007 Mercury MontereyV6-4.2LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$197.82Shop/Dealer Price$243.42 - $337.70
2004 Mercury MontereyV6-4.2LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$176.82Shop/Dealer Price$218.04 - $309.04
2004 Mercury MontereyV6-4.2LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$197.82Shop/Dealer Price$243.51 - $337.87
2006 Mercury MontereyV6-4.2LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$197.82Shop/Dealer Price$243.49 - $337.82
Show example Mercury Monterey 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