Kia Sephia 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

(46)

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

(46)

Oxygen Sensor Replacement Service

How much does a Oxygen Sensor Replacement cost?

On average, the cost for a Kia Sephia Oxygen Sensor Replacement is $219 with $79 for parts and $140 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2000 Kia SephiaL4-1.8LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$492.86Shop/Dealer Price$580.93 - $837.02
1997 Kia SephiaL4-1.8LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$443.55Shop/Dealer Price$519.77 - $744.32
1996 Kia SephiaL4-1.8LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$443.55Shop/Dealer Price$519.80 - $744.36
2001 Kia SephiaL4-1.8LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$483.85Shop/Dealer Price$570.17 - $824.96
1995 Kia SephiaL4-1.6LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$304.35Shop/Dealer Price$347.27 - $468.54
1996 Kia SephiaL4-1.6LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$304.35Shop/Dealer Price$345.94 - $466.21
1997 Kia SephiaL4-1.6LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$304.35Shop/Dealer Price$345.81 - $465.99
1995 Kia SephiaL4-1.8LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$517.95Shop/Dealer Price$612.80 - $893.16
Show example Kia Sephia 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 Kia mechanics

Real customer reviews from Kia owners like you.

Excellent Rating

(46)

Rating Summary
43
1
0
0
2
43
1
0
0
2

Daniel

8 years of experience
37 reviews
Daniel
8 years of experience
Sephia 1999 - Check Engine Light is on - Las Vegas, NV
Great Job. Very polite, friendly, does excellent work.

Christopher

15 years of experience
286 reviews
Christopher
15 years of experience
Sephia 1997 - Timing Belt - Tampa, FL
The best experience

Luis

13 years of experience
142 reviews
Luis
13 years of experience
Sephia 1999 - Proportioning / Combination Valve - Las Vegas, NV
Good job

Excellent Rating

(46)

Rating Summary
43
1
0
0
2
43
1
0
0
2
Number of Kia Sephia services completed
506+
services done by our mechanics
TOTAL NUMBER OF EXPERT Kia MECHANICS
1100+
experts on our platform

Recent articles & questions

Symptoms of a Bad or Failing Brake Booster Vacuum Sensor
A failing brake booster vacuum sensor will cause the brake pedal to be stiff or turn on the Check Engine Light.
How to Replace an Air Fuel Ratio Sensor
The air fuel ratio sensor fails within a vehicle if the check engine light comes on. Poor engine performance results from oxygen sensor failure.
Symptoms of a Bad or Failing Top Dead Center (TDC) Sensor
Common signs include the Check Engine Light coming on, car not starting, and engine misfiring or running rough.

Bad crank sensor

Hello. Just about anything is possible but it is unlikely. I have seen crank sensors (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-crankshaft-position-sensor) go bad and cause many issues, but if you are not having any other issues then I think that it is unlikely. If I...

P0011 trouble code and there is a loud noise behind the engine.

Hi there. The code P0011 (https://www.yourmechanic.com/article/p0011-obd-ii-trouble-code-camshaft-position-a-timing-over-advanced-or-system-performance-bank-1-by-jay-safford) is stored for the camshaft position sensor is not registering to the computer. Check the camshaft position sensor and see if its working and plugged in. It is possible that the sensor has failed...

How many camshaft sensors are there in my 2003 infiniti m45? 2003 Inifiniti M45

Hello - there are actually 3 sensors that report camshaft position and timing information to engine management. There are 2 intake valve timing position sensors (one for each bank of cylinders), and a camshaft timing sensor. These all report camshaft...

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