Audi A8 Quattro Oxygen Sensor Replacement at your home or office.

Our mobile mechanics offer services 7 days a week. Upfront and transparent pricing.

Get an upfront price

Service Area

Average rating from customers who
received a Oxygen Sensor Replacement.
Learn More

$265.50 - $1,901.89

Price range for all vehicles


YourMechanic Benefits

Online Booking

Mechanic comes to you

12-month / 12k-mile warranty

Free 50 point safety inspection

Our certified mobile mechanics can come to your home or office 7 days a week between 7 AM and 9 PM.

Average rating from customers who
received a Oxygen Sensor Replacement.
Learn More


Oxygen Sensor Replacement Estimate for Audi A8 Quattro

Audi A8 Quattro Oxygen Sensor Replacement costs $645 on average.

CarServiceEstimateShop/Dealer Price
2009 Audi A8 QuattroV8-4.2LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$3328.83Shop/Dealer Price$4160.15 - $6589.18
1998 Audi A8 QuattroV8-4.2LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$758.91Shop/Dealer Price$947.90 - $1449.60
2007 Audi A8 QuattroW12-6.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$695.53Shop/Dealer Price$861.22 - $1240.05
2012 Audi A8 QuattroV8-4.2LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$1538.91Shop/Dealer Price$1927.01 - $3016.80
2005 Audi A8 QuattroV8-4.2LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$1819.11Shop/Dealer Price$2266.70 - $3496.56
2001 Audi A8 QuattroV8-4.2LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$1054.91Shop/Dealer Price$1310.17 - $2028.07
2017 Audi A8 QuattroV6-3.0L TurboService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$961.19Shop/Dealer Price$1184.55 - $1821.88
2015 Audi A8 QuattroW12-6.3LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$676.25Shop/Dealer Price$844.25 - $1287.64
Show example Audi A8 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.

Fast and easy 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 Audi mechanics

Real customer reviews from Audi owners like you.

Excellent Rating


YourMechanic Audi A8 Quattro Service

Average Rating

4.8/5

Number of Reviews

73

Rating Summary
68
1
1
0
3
68
1
1
0
3

Eric

13 years of experience
71 reviews
Eric
13 years of experience
Audi A8 Quattro - Oil Change - Jonesboro, Georgia
Eric was on time, professional, and thorough. Excellent job!

Khoa

19 years of experience
376 reviews
Khoa
19 years of experience
Audi A8 Quattro - Coolant Temperature Switch (Sensor) - Stanford, California
Khoa was very professional, efficient, and informative. When availability opened up, he called to see if arriving earlier in the day would be more convenient than the scheduled appointment time. Khoa also suggested additional services based on aspects of my car that he noticed during the repair and patiently answered my multitude of questions. Finally, when the bill was more expensive than the initial estimate, he encouraged me to call customer service for clarification and amendment of the price (I called and YourMechanic addressed and resolved the issue immediately). Overall, a very positive experience!

Khoa

19 years of experience
376 reviews
Khoa
19 years of experience
Audi A8 Quattro - Check Engine Light is on - Stanford, California
Accommodating and efficient. I would definitely recommend Khoa to a friend or colleague!

James

7 years of experience
128 reviews
James
7 years of experience
Audi A8 Quattro - Oil Change - Atlanta, Georgia
awesome

Excellent Rating


YourMechanic Audi A8 Quattro Service

Average Rating

4.8/5

Number of Reviews

73

Rating Summary
68
1
1
0
3
68
1
1
0
3
Red-stars EXCELLENT RATING ON
Number of Audi A8 Quattro services completed
803+
services done by our mechanics
TOTAL NUMBER OF EXPERT Audi MECHANICS
600+
experts on our platform

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