Ford Fiesta 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

(9)

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

(9)

Oxygen Sensor Replacement Service

How much does a Oxygen Sensor Replacement cost?

On average, the cost for a Ford Fiesta Oxygen Sensor Replacement is $151 with $56 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
1978 Ford FiestaL4-1.6LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$383.71Shop/Dealer Price$460.89 - $669.93
2014 Ford FiestaL4-1.6L TurboService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$275.59Shop/Dealer Price$330.76 - $473.72
2018 Ford FiestaL4-1.6LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$282.57Shop/Dealer Price$339.48 - $487.68
2018 Ford FiestaL4-1.6LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$282.57Shop/Dealer Price$339.46 - $487.64
2018 Ford FiestaL4-1.6L TurboService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$282.57Shop/Dealer Price$339.50 - $487.71
2015 Ford FiestaL4-1.6L TurboService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$207.15Shop/Dealer Price$245.21 - $336.84
2014 Ford FiestaL4-1.6L TurboService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$280.59Shop/Dealer Price$335.62 - $478.48
1979 Ford FiestaL4-1.6LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$368.71Shop/Dealer Price$446.14 - $655.38
Show example Ford Fiesta 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

(9)

Rating Summary
8
1
0
0
0
8
1
0
0
0

Patrick

26 years of experience
1550 reviews
Patrick
26 years of experience
Fiesta 2015 - Oxygen Sensor - Austin, TX
Constant communication, quick service, good recommendations for maintenance, I will use this service again

Luis

14 years of experience
288 reviews
Luis
14 years of experience
Fiesta 2011 - Oxygen Sensor - Fort Lee, NJ
Luis did a great job!

Nchang

9 years of experience
4 reviews
Nchang
9 years of experience
Fiesta 2013 - Car is not starting - Baltimore, MD
Nchang was very professional and will definitely be calling him for all future mechanical issues

Dominic

0 years of experience
231 reviews
Dominic
0 years of experience
Fiesta 2013 - Pre-purchase Car Inspection - Cape Coral, FL
Very nice guy. On time. Satisfied with Dominic.

Excellent Rating

(9)

Rating Summary
8
1
0
0
0
8
1
0
0
0
Number of Ford Fiesta Oxygen Sensor Replacement services completed
99+
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 Speed Timing Sensor
Common signs include the transmission having difficulty shifting, Check Engine Light coming on, vehicle not starting, and loss of engine power.
How to Replace a Low Oil Level Sensor
A low oil light sensor allows you to know when your oil levels are low. A bad sensor won't be able to alert you, causing wear and damage as you drive.
How to Replace a Manifold Temperature Sensor
Signs of a failing manifold temperature sensor include rough idling and a rough running engine, and may result in a failed emissions test.

Service Engine Soon and ABS light on. Won't pass smog check.

The problem may be the reluctor wheel. This is what the sensor reads as the wheel turns. If one of the teeth on the wheel are damaged or missing, the sensor will not be able to determine speed. The problem...

Car keeps stalling after changing TPS and solenoid

There are several possibilities as to why your Dodge Intrepid is stalling after giving the pedal a push. The two most common causes are lack of fuel pressure and/or worn out spark plugs. It is also possible that the camshaft...

The Adaptive stability control went out on my car I took it to a local mechanic he said he thinks the throttle is going bad he unh

Unfortunately, the cause of your concern cannot be determined without visual inspection and further testing. While it is possible that your throttle position sensor may be faulty (https://www.yourmechanic.com/services/throttle-position-sensor-replacement), it is more than likely that it could be a wheel speed...

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