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Estimates Exhaust and Emissions Front Oxygen Sensor Replacement

Audi A6 Quattro Front Oxygen Sensor Replacement

An oxygen sensor replacement is usually a pretty straightforward and affordable task. We stress the term usually because replacement cost can vary, depending on what type of car you have.

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$90.58 $1010.5

This range covers an average Front Oxygen Sensor replacement per set. Tell us your car to get a guaranteed price from RepairSmith.

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Audi A6 Quattro Front Oxygen Sensor Replacement

RepairSmith offers upfront and competitive pricing. The average cost for Audi A6 Quattro Front Oxygen Sensor Replacement is $394. Drop it off at our shop and pick it up a few hours later, or save time and have our Delivery mechanics come to you.

Car
Quoted to
Drop-off
Delivery
Price
2010 Audi A6 Quattro 3.0L V6 Superch...
126,000 miles
Demyjay C  • 
October 27, 2020 8:40 PM  • 
Las Vegas NV 89121
$352
5.20  hrs
1.10  hrs
2012 Audi A6 Quattro 3.0L V6 Superch...
78,714 miles
Katrina M  • 
October 14, 2020 10:34 PM  • 
Menifee CA 92584
$390
5.60  hrs
0.90  hrs
2013 Audi A6 Quattro 3.0L V6 Superch...
115,000 miles
Heather S  • 
October 9, 2020 7:50 PM  • 
Roseville CA 95661
$414
1.80  hrs
1.00  hrs
2009 Audi A6 Quattro 3.0L V6 Superch...
130,000 miles
Rick C  • 
July 25, 2020 12:19 AM  • 
Oceanside CA 92054
$368
0.80  hrs
1.10  hrs
2013 Audi A6 Quattro 3.0L V6 Superch...
70,000 miles
Raul T  • 
June 25, 2020 1:59 AM  • 
Montebello CA 90640
$365
1.20  hrs
1.10  hrs
2001 Audi A6 Quattro 2.7L V6 Turbo
140,000 miles
Kristel G  • 
April 21, 2020 7:43 PM  • 
Las Vegas NV 89106
$320
3.40  hrs
1.70  hrs
2005 Audi A6 Quattro Base
168,000 miles
Eloise T  • 
November 11, 2019 2:06 AM  • 
San Bernardino CA 92404
$450
5.60  hrs
1.60  hrs
2005 Audi A6 Quattro Base
166,000 miles
Eloise T  • 
November 8, 2019 12:14 AM  • 
San Bernardino CA 92404
$450
6.20  hrs
1.60  hrs
2003 Audi A6 Quattro Base
129,500 miles
Niki L  • 
November 7, 2019 3:52 AM  • 
Apple Valley CA 92308
$427
4.90  hrs
1.50  hrs
2003 Audi A6 Quattro Base
129,500 miles
Niki L  • 
November 7, 2019 3:49 AM  • 
Apple Valley CA 92308
$427
2.40  hrs
1.60  hrs
2006 Audi A6 Quattro Avant
160,000 miles
Courtney R  • 
August 5, 2019 8:18 PM  • 
Anaheim CA 92804
$440
1.70  hrs
1.50  hrs
2008 Audi A6 Quattro 3.2L V6
170,000 miles
Jessica R  • 
 • 
Glendale AZ 85301
$323
2.50  hrs
1.10  hrs
Last Updated:
Nov 13, 2020 5:47 PM
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What is a Front Oxygen Sensor?

This might blow your mind but…oxygen sensors (O2s) are sensors that measure oxygen. Yep, the sensors calculate the amount of oxygen in the exhaust stream, then share that information with your car’s main computer. Most modern cars have at least two oxygen sensors: one before the catalytic converter and one after the catalytic converter. In case you were wondering, the catalytic converter, which is located in the exhaust system, is an emissions control device that cleans up the fumes leaving your engine. Anyhow, the front oxygen sensor (also known as an upstream oxygen sensor) is a key input to your car’s computer for fuel control. The computer uses information from the sensor to estimate the engine’s air-fuel mixture. Then, it adjusts fuel delivery accordingly. On the other hand, the rear oxygen sensor (also known as a downstream oxygen sensor) primarily monitors the performance of the catalytic converter. The rear sensor has very little, if any, input regarding fuel control. Oh, and one more thing – most modern oxygen sensors have built-in heaters. When you first start your engine when it’s cold, the heater element gets the sensor nice and toasty. That allows the sensor to get up-to-speed and begin operating more quickly.
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Symptoms of a Failing Front Oxygen Sensor

Check engine light

If your car’s oxygen sensor isn’t doing its job, chances are, the computer will notice and turn on the check engine light. The device will also store corresponding diagnostic trouble codes (DTCs) in its brain. Your mechanic can retrieve said codes using an electronic device, called a scan tool.

Poor engine performance

The front oxygen sensor is a primary input to your car’s computer for fuel control. And guess what that means? If the sensor is out to lunch, the computer may end up giving your engine too much or too little fuel. As a result, you may experience performance problems, such as rough running, lack of acceleration and stalling.

Reduced fuel economy

As was mentioned, the front oxygen sensor is a key input to your car’s computer for fuel control. As such, it can confuse the computer and cause it to throw the engine’s air-fuel ratio out of whack, killing your gas mileage.

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How urgent is Front Oxygen Sensor Replacement?

Typically, a bad front oxygen sensor won’t leave you stranded. But it can cause your car to run poorly. Although somewhat rare, a faulty oxygen sensor can also damage other components, such as the catalytic converter. And trust us, catalytic converters are expensive. So, you don’t want to be buying a new one.

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