Audi A6 Quattro Oxygen Sensor Replacement at your home or office.

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Oxygen Sensor Replacement Estimate for Audi A6 Quattro

Audi A6 Quattro Oxygen Sensor Replacement costs $528 on average.

CarServiceEstimateShop/Dealer Price
2003 Audi A6 QuattroV8-4.2LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$1049.91Shop/Dealer Price$1315.19 - $2033.86
2016 Audi A6 QuattroL4-2.0L TurboService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$1319.65Shop/Dealer Price$1651.30 - $2597.34
2002 Audi A6 QuattroV6-2.7L TurboService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$1017.91Shop/Dealer Price$1274.81 - $1977.07
2014 Audi A6 QuattroV6-3.0L Turbo DieselService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$1319.65Shop/Dealer Price$1651.26 - $2597.27
2002 Audi A6 QuattroV6-2.7L TurboService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$733.71Shop/Dealer Price$918.90 - $1425.51
2014 Audi A6 QuattroV6-3.0L TurboService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$668.71Shop/Dealer Price$837.62 - $1295.46
2005 Audi A6 QuattroV6-3.2LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$1046.71Shop/Dealer Price$1308.63 - $2046.04
2004 Audi A6 QuattroV8-4.2LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$1042.91Shop/Dealer Price$1304.89 - $2021.08
Show example Audi A6 Quattro Oxygen Sensor Replacement prices

Oxygen Sensor Replacement Service

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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Robert

31 years of experience
639 reviews
Robert
31 years of experience
Audi A6 Quattro V6-2.8L - Power Steering Fluid Service - San Jose, California
I had an excellent experience with Robert the mechanic. Every thing went as described. He was efficient, knowledgeable, and industrious. No time was wasted and all was completed as scheduled. He communicated well and explained everything he was doing. He thoroughly checked the entire car and found a leaking gasket to be repaired in a follow-up session. I would be pleased to recommend Robert and YourMechanic to one and all. Joe Papa, San jose

H

26 years of experience
828 reviews
H
26 years of experience
Audi A6 Quattro V6-3.0L Turbo Diesel - Brake Pads Replacement (Front) - Menlo Park, California
Great experience from start to finish an all round nice guy that got the job done. I will use him again and no reservations recommending him.

Anderson

27 years of experience
90 reviews
Anderson
27 years of experience
Audi A6 Quattro V6-3.0L Turbo - Oil Change - Brooklyn, New York
Fast reliable service. What else can you ask for? Will definitely recommend Anderson to any one in the tristate area!

Sebastian

15 years of experience
11 reviews
Sebastian
15 years of experience
Audi A6 Quattro V6-2.8L - Radiator - Chicago, Illinois
Sebastian was very professional in all aspects of the job. He was very timely in meeting the scheduled appointment time, called me before he arrived and was very courteous and through with his explanation of the problems with my car along with his recommendations. Sebastian was very knowledgeable, fast and left the work space how he found it, CLEAN. Would highly recommend him and will be using him again!

Excellent Rating

(253)

Rating Summary
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