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Exhaust and Emissions Front Oxygen Sensor Replacement

Ford Focus 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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Range for All Cars

$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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Ford Focus Front Oxygen Sensor Replacement

RepairSmith offers upfront and competitive pricing. The average cost for Ford Focus Front Oxygen Sensor Replacement is $163. 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
2006 Ford Focus 2.0L L4
103,000 miles
Marco I  • 
September 7, 2020 3:54 PM  • 
Los Angeles CA 90023
$135
1.30  hrs
0.70  hrs
2005 Ford Focus 2.0L L4
7,000 miles
Jasmine P  • 
September 7, 2020 1:22 PM  • 
Tempe AZ 85281
$135
3.60  hrs
0.50  hrs
2005 Ford Focus 2.0L L4
7,000 miles
Jasmine P  • 
September 7, 2020 1:19 PM  • 
Tempe AZ 85281
$135
5.40  hrs
0.60  hrs
2014 Ford Focus 2.0L L4
105,941 miles
Raymond E  • 
August 28, 2020 1:03 PM  • 
Tempe AZ 85281
$179
2.70  hrs
0.70  hrs
2015 Ford Focus 2.0L L4
95,000 miles
Paolo M  • 
August 21, 2020 5:53 PM  • 
Henderson NV 89011
$179
4.60  hrs
0.80  hrs
2011 Ford Focus 2.0L L4
192,213 miles
Athena C  • 
July 30, 2020 10:34 PM  • 
Citrus Heights CA 95621
$142
3.80  hrs
0.80  hrs
2005 Ford Focus
33,000 miles
Melanie C  • 
July 23, 2020 10:41 PM  • 
Los Angeles CA 90007
$145
2.50  hrs
0.80  hrs
2015 Ford Focus 2.0L L4 SE
149,234 miles
Kyle B  • 
May 16, 2020 11:00 AM  • 
Milpitas CA 95035
$128
2.00  hrs
0.90  hrs
2003 Ford Focus 2.3L L4
0 miles
Kerry V  • 
April 24, 2020 8:33 PM  • 
Covina CA 91723
$145
2.80  hrs
1.00  hrs
2008 Ford Focus 2.0L L4
100,000 miles
Sasha M  • 
February 20, 2020 8:15 PM  • 
Glendale CA 91204
$129
1.30  hrs
0.90  hrs
2005 Ford Focus
175,000 miles
Chelsea H  • 
January 13, 2020 8:27 AM  • 
Chino CA 91710
$133
3.80  hrs
0.80  hrs
2003 Ford Focus
201 miles
Alexis M  • 
December 14, 2019 9:42 PM  • 
Riverside CA 92507
$155
1.10  hrs
1.00  hrs
2007 Ford Focus 2.0L L4
118,000 miles
Robert M  • 
December 10, 2019 9:30 AM  • 
Daly City CA 94015
$138
5.00  hrs
0.50  hrs
2012 Ford Focus 2.0L L4
100,000 miles
Michael P  • 
December 3, 2019 12:52 AM  • 
Las Vegas NV 89147
$284
4.60  hrs
0.80  hrs
2013 Ford Focus
87,000 miles
Sean carroll C  • 
November 1, 2019 4:31 PM  • 
Chula Vista CA 91910
$287
1.60  hrs
1.30  hrs
2006 Ford Focus ZX4 ST
12,000 miles
Joelett R  • 
October 28, 2019 2:08 AM  • 
San Jose CA 95123
$179
5.40  hrs
1.00  hrs
2007 Ford Focus SE
66,800 miles
Steven S  • 
October 17, 2019 5:36 AM  • 
Henderson NV 89015
$161
4.90  hrs
1.00  hrs
2013 Ford Focus SE
180,000 miles
Billy T  • 
August 21, 2019 2:58 AM  • 
Los Angeles CA 90044
$207
1.40  hrs
1.30  hrs
2003 Ford Focus 2.0L L4 SVT
154,000 miles
Chris K  • 
 • 
Las Vegas NV 89119
$87
1.10  hrs
0.50  hrs
Last Updated:
Sep 11, 2020 3:48 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.

Get a Quote 1-Year | 12,000-Mile Warranty

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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Get a Quote 1-Year | 12,000-Mile Warranty

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