Ford Focus Oxygen Sensor Replacement at your home or office.

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

Estimate price near me

Service Location

Customer Ratings

(12)

Included for free with this service

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.

Customer Ratings

(12)

Oxygen Sensor Replacement Service

How much does a Oxygen Sensor Replacement cost?

On average, the cost for a Ford Focus Oxygen Sensor Replacement is $139 with $44 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2009 Ford FocusL4-2.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$267.91Shop/Dealer Price$316.14 - $438.33
2003 Ford FocusL4-2.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$200.29Shop/Dealer Price$236.63 - $323.12
2000 Ford FocusL4-2.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$200.29Shop/Dealer Price$236.63 - $323.12
2015 Ford FocusL4-2.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$318.95Shop/Dealer Price$384.94 - $560.40
2003 Ford FocusL4-2.3LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$247.91Shop/Dealer Price$296.17 - $418.39
2015 Ford FocusL4-2.0L TurboService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$318.95Shop/Dealer Price$384.96 - $560.44
2018 Ford FocusL4-2.3L TurboService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$188.01Shop/Dealer Price$219.90 - $293.32
2013 Ford FocusL4-2.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$323.95Shop/Dealer Price$390.19 - $565.86
Show example Ford Focus Oxygen Sensor Replacement prices

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

Backed by 12-month, 12.000-mile guarantee


Meet some of our expert Ford mechanics

Real customer reviews from Ford owners like you.

Excellent Rating

(12)

Rating Summary
10
2
0
0
0
10
2
0
0
0

Jose

9 years of experience
276 reviews
Jose
9 years of experience
Focus 2012 - Oxygen Sensor - Marietta, GA
Jose is THE MAN! He showed up about 30 minutes early, ready to work. He was very friendly and knowledgeable. I always ask a lot of questions for my own knowledge. He got under the hood, moved a few things around, cut a hose or two, then VOILA! Done. No more than 30 mins.. Great service!

Jermaine

10 years of experience
9 reviews
Jermaine
10 years of experience
Focus 2010 - Brake System Flush - Stockbridge, GA
Great and professional ..

Jermaine

10 years of experience
9 reviews
Jermaine
10 years of experience
Focus 2010 - Valve Cover Gasket - Stockbridge, GA
Great and professional ..

Jermaine

10 years of experience
9 reviews
Jermaine
10 years of experience
Focus 2010 - Windshield Wiper Blade - Stockbridge, GA
Great and professional ..

Excellent Rating

(12)

Rating Summary
10
2
0
0
0
10
2
0
0
0
Number of Ford Focus Oxygen Sensor Replacement services completed
132+
services done by our mechanics
TOTAL NUMBER OF EXPERT Ford MECHANICS
1700+
experts on our platform

Recent articles & questions

Symptoms of a Bad or Failing Throttle Position Sensor
Common signs include lacking power when accelerating, rough or slow idle, stalling, inability to shift up, and the Check Engine Light coming on.
How Long Does a Top Dead Center (TDC) Sensor Last?
The The top dead center (TDC) sensor is the point from which the firing order is determined and the ignition system measurements are taken. The measurements are normally defined as before top dead center and after top dead center. The...
Symptoms of a Bad or Failing Throttle/Accelerator Pedal Position Sensor
Common signs of a faulty pedal position sensor include inconsistent engine response, reduced fuel efficiency, and the Check Engine Light coming on.

There is a strong knocking sound coming from the engine. Today my car won't start. Service engine light is on. It keeps turning over

Hi there. When the crankshaft position sensor (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-crankshaft-position-sensor) is damaged or faulty, it will cause intermittent starting issues, misfiring problems, or might cause the vehicle to fail to start entirely. The best way to resolve this issue is to contact...

The car has good spark and fuel but won't fire up

Hi there: In most cases, the issue you're describing is typically caused by ignition coil (https://www.yourmechanic.com/services/ignition-coil-replacement), distributor rotor (https://www.yourmechanic.com/services/distributor-rotor-and-cap-replacement), or crankshaft position sensor (https://www.yourmechanic.com/services/crankshaft-position-sensor-replacement) that is faulty, damaged or has an electrical harness that is pinched or damaged. It could...

My car stopped accelerating while driving and turned off.. lights and everything else would work but car wouldn't turn on 2002 Acura MDX

Hi there - there are 2 failures in particular that are likely candidates at your mileage level - a failed timing belt (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-timing-belt), and a fuel pump malfunction. If you don't hear the fuel pump run for a few seconds...

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 (855) 347-2779 · hi@yourmechanic.com