Cadillac Eldorado Oxygen Sensor Replacement at your home or office.

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Oxygen Sensor Replacement Estimate for Cadillac Eldorado

Cadillac Eldorado Oxygen Sensor Replacement costs $133 on average. Following is a breakdown of the labor and parts estimates.

YourMechanic Price
$95 to $204
Labor: $70 -$80
Parts: $25 -$124
Average Dealer price
$143 to 340
Average Shop price
$115 to 238
Get an instant quote for your car
Our mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing
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CarServiceYourMechanic PriceShop/Dealer Price
1993 Cadillac EldoradoV8-4.9LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$153.96Shop/Dealer Price$200.36 - $282.39
1994 Cadillac EldoradoV8-4.6LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$221.16Shop/Dealer Price$284.48 - $417.00
1983 Cadillac EldoradoV8-4.1LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$140.20Shop/Dealer Price$183.20 - $254.94
2001 Cadillac EldoradoV8-4.6LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$189.06Shop/Dealer Price$244.31 - $352.72
1984 Cadillac EldoradoV8-5.7L DieselService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$140.20Shop/Dealer Price$183.18 - $254.90
1984 Cadillac EldoradoV8-5.7L DieselService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$140.20Shop/Dealer Price$183.15 - $254.85
1982 Cadillac EldoradoV8-5.7L DieselService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$313.36Shop/Dealer Price$399.76 - $601.45
2000 Cadillac EldoradoV8-4.6LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$189.06Shop/Dealer Price$244.35 - $352.79
Show example Cadillac Eldorado 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.

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Meet some of our expert Cadillac mechanics

Real customer reviews from Cadillac owners like you.

455 reviews
Jeffrey
23 years of experience
Jeffrey was great! Arrived on time and did a great job. He knows his stuff when it came to my 2000 Cadillac Eldorado. Very pleased with his work and ethics. Will definitely be scheduling him for his recommended services very soon
2000 CADILLAC ELDORADO - FREE SUMMER INSPECTION
449 reviews
Dan
35 years of experience
The appointment went fine. Unfortunately the part was not correct for the problem. Not Dan's fault, just that the part needed is obsolete. If I can find the part from a junkyard, I'll reschedule.
1994 CADILLAC ELDORADO - CRUISE CONTROL BRAKE RELEASE SWITCH REPLACEMENT
401 reviews
Jay
33 years of experience
Having a certified technician come to my home to repair my car not only gives one a peace of mind it also nice to put the personal care back where it belongs between the technian and customers. Old School! Being able to ask and answer questions made me feel that I mattered.
1983 CADILLAC ELDORADO - RESERVATION
202 reviews
Danny
7 years of experience
I am satisfied with the work Danny did on my car. He changed my spark plugs and he told me what the other repairs were that I needed. He cleaned my garage when he was finished working on my car, and he completed the job in good time.
1998 CADILLAC ELDORADO - SPARK PLUG REPLACEMENT
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
1993 Cadillac EldoradoV8-4.9LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$153.96Shop/Dealer Price$200.36 - $282.39
1994 Cadillac EldoradoV8-4.6LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$221.16Shop/Dealer Price$284.48 - $417.00
1983 Cadillac EldoradoV8-4.1LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$140.20Shop/Dealer Price$183.20 - $254.94
2001 Cadillac EldoradoV8-4.6LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$189.06Shop/Dealer Price$244.31 - $352.72
1984 Cadillac EldoradoV8-5.7L DieselService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$140.20Shop/Dealer Price$183.18 - $254.90
1984 Cadillac EldoradoV8-5.7L DieselService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$140.20Shop/Dealer Price$183.15 - $254.85
1982 Cadillac EldoradoV8-5.7L DieselService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$313.36Shop/Dealer Price$399.76 - $601.45
2000 Cadillac EldoradoV8-4.6LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$189.06Shop/Dealer Price$244.35 - $352.79
Show example Cadillac Eldorado Oxygen Sensor Replacement prices

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