Audi S7 Oxygen Sensor Replacement at your home or office.

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Oxygen Sensor Replacement Estimate for Audi S7

Audi S7 Oxygen Sensor Replacement costs $265 on average. Following is a breakdown of the labor and parts estimates.

YourMechanic Price
$214 to $376
Labor: $70 -$80
Parts: $144 -$296
Average Dealer price
$381 to 684
Average Shop price
$263 to 453
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
2016 Audi S7V8-4.0L TurboService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$661.34Shop/Dealer Price$845.48 - $1316.21
2016 Audi S7V8-4.0L TurboService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$389.84Shop/Dealer Price$506.27 - $773.51
2018 Audi S7V8-4.0L TurboService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$357.66Shop/Dealer Price$444.12 - $670.77
2018 Audi S7V8-4.0L TurboService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$395.58Shop/Dealer Price$491.54 - $746.65
2013 Audi S7V8-4.0L TurboService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$396.36Shop/Dealer Price$514.28 - $786.29
2015 Audi S7V8-4.0L TurboService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$661.34Shop/Dealer Price$845.46 - $1316.18
2015 Audi S7V8-4.0L TurboService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$396.36Shop/Dealer Price$514.47 - $786.62
2017 Audi S7V8-4.0L TurboService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$661.34Shop/Dealer Price$823.76 - $1278.20
Show example Audi S7 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.

Chris

18 years of experience
897 reviews
Chris
18 years of experience
Fix the battery problem.and came early
2006 AUDI A4 QUATTRO - BATTERY - RANCHO SANTA MARGARITA, CA

Shaun

12 years of experience
230 reviews
Shaun
12 years of experience
He finished work quickly. However, I found the brake light waning light was on when I started the car subsequently after he left. I had to check the light bulb and replace it. If Shaun can have a final inspection before he left, I probably let him fix it together.
2008 AUDI A4 QUATTRO - BRAKE PADS REPLACEMENT (REAR) - ASHLAND, MO

Joseph

14 years of experience
106 reviews
Joseph
14 years of experience
OMG, amazing! He is very thorough and he double checks on what he does. Also, he takes the time to explain to you what is going on with your vehicle based on the service! Truly, he did a great job!
2011 AUDI Q5 - BRAKE PADS REPLACEMENT (FRONT) - PARKVILLE, MD

Charles

30 years of experience
94 reviews
Charles
30 years of experience
Great job! Very professional and on time. Will definitely use again.
2012 AUDI A7 QUATTRO - BRAKE PADS REPLACEMENT (FRONT) - ROUND ROCK, 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
2016 Audi S7V8-4.0L TurboService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$661.34Shop/Dealer Price$845.48 - $1316.21
2016 Audi S7V8-4.0L TurboService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$389.84Shop/Dealer Price$506.27 - $773.51
2018 Audi S7V8-4.0L TurboService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$357.66Shop/Dealer Price$444.12 - $670.77
2018 Audi S7V8-4.0L TurboService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$395.58Shop/Dealer Price$491.54 - $746.65
2013 Audi S7V8-4.0L TurboService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$396.36Shop/Dealer Price$514.28 - $786.29
2015 Audi S7V8-4.0L TurboService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$661.34Shop/Dealer Price$845.46 - $1316.18
2015 Audi S7V8-4.0L TurboService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$396.36Shop/Dealer Price$514.47 - $786.62
2017 Audi S7V8-4.0L TurboService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$661.34Shop/Dealer Price$823.76 - $1278.20
Show example Audi S7 Oxygen Sensor Replacement prices

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