Oxygen Sensor Replacement at your home or office.

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Oxygen Sensor Replacement Estimate for Audi 90

Audi 90 Oxygen Sensor Replacement costs $185 on average. Following is a breakdown of the labor and parts estimates.

YourMechanic Price
$158 to $268
Labor: $70 -$112
Parts: $88 -$156
Average Dealer price
$268 to 442
Average Shop price
$193 to 311
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
1989 Audi 90L5-2.3LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$164.73Shop/Dealer Price$213.82 - $303.92
1993 Audi 90V6-2.8LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$235.33Shop/Dealer Price$302.19 - $445.33
1990 Audi 90L5-2.3LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$162.98Shop/Dealer Price$211.67 - $300.49
1989 Audi 90L5-2.3LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$162.98Shop/Dealer Price$211.71 - $300.56
1990 Audi 90L5-2.3LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$164.73Shop/Dealer Price$213.84 - $303.96
1988 Audi 90L5-2.3LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$164.73Shop/Dealer Price$213.81 - $303.91
1993 Audi 90V6-2.8LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$239.22Shop/Dealer Price$307.09 - $453.17
1988 Audi 90L5-2.3LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$162.98Shop/Dealer Price$211.74 - $300.62
Show example Audi 90 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 Audi mechanics

Real customer reviews from Audi owners like you.

341 reviews
Honorio
14 years of experience
Honorio was great. He was very thorough and took the time needed to get the job done. Thank-you.
2001 AUDI A4 QUATTRO - ALTERNATOR REPAIR
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132 reviews
Alex
11 years of experience
Alex was extremely knowledgable and courteous. He did a great job to fix the issue with my vehicle and ensured that I was well informed throughout the process. He is definately a great value to the your mechanic team and its customers. I am going to ensure that I ask for him to fix or repair any other issues with my cars. Thank you !!!
2008 AUDI Q7 - OIL/FLUID LEAK INSPECTION
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87 reviews
Chris
21 years of experience
Chris was not only on time but early. A very personable and knowledgeable person.. very professional. I would not hesitate to call Chris again for my automotive needs.
2000 AUDI A6 QUATTRO - CHECK ENGINE LIGHT IS ON INSPECTION
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52 reviews
Rusty
18 years of experience
Rusty, was very professional, showed up on time, took pictures of the car, and explained the work that was going to be done. They did what their website said they were going to do. When the work was done, he sent me an email explaining with recorded message of their work. I had some of my own parts and they reduced that amount of my bill when the work was complete. They also did a complete car inspection and let me know the overall health of the car and status of the rest of the car. I was very pleased with their service and would definitely use them again and recommend them.
2000 AUDI A6 QUATTRO - RADIATOR HOSE REPLACEMENT (UPPER)
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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
1989 Audi 90L5-2.3LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$164.73Shop/Dealer Price$213.82 - $303.92
1993 Audi 90V6-2.8LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$235.33Shop/Dealer Price$302.19 - $445.33
1990 Audi 90L5-2.3LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$162.98Shop/Dealer Price$211.67 - $300.49
1989 Audi 90L5-2.3LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$162.98Shop/Dealer Price$211.71 - $300.56
1990 Audi 90L5-2.3LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$164.73Shop/Dealer Price$213.84 - $303.96
1988 Audi 90L5-2.3LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$164.73Shop/Dealer Price$213.81 - $303.91
1993 Audi 90V6-2.8LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$239.22Shop/Dealer Price$307.09 - $453.17
1988 Audi 90L5-2.3LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$162.98Shop/Dealer Price$211.74 - $300.62
Show example Audi 90 Oxygen Sensor Replacement prices

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