What precautions should be taken when servicing an oxygen sensor on Kia Optima?

Special care is required when servicing an oxygen sensor due to the permanently attached pigtail and electrical connector that can't be removed from the sensor. Any damage to or removal of these components will ruin the sensor. It's important to keep grease, dirt and other contaminants away from the electrical connector and the oxygen sensor. Cleaning solvents of any kind should not be used on an oxygen sensor, and it should not be dropped or roughly handled. When replacing the sensor, note that it is installed in the exhaust manifold or catalytic converter, which contract when cool, making the sensor difficult to loosen when the engine is cold. To avoid damage, start and run the engine for a minute or two, then shut it off. The sensors are located at each primary catalytic converter near the exhaust manifolds and there is also a rear sensor in the exhaust pipe beneath the vehicle. If working on the rear sensor, raise the vehicle and support it securely on jackstands. This may ease things even if you're removing a front lower sensor. Remove any interfering components to provide wrench access to the sensor. These components vary greatly depending on your model year and the options installed. Disconnect the sensor pigtail and release the wiring from any retainers. Unscrew the sensor using a specialty socket. Some oxygen sensors that are mounted through heat shields have a large flange and require an oxygen sensor socket for removal. Special oxygen sensor sockets are available at most auto parts stores. Be careful to avoid damaging the hex on the sensor. Installation is the reverse of removal. Be sure to coat the threads of the oxygen sensor with anti-seize compound and tighten it to the torque.

Genuine Kia Optima Oxygen Sensor

Oxygen O2 Sensor

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35 Oxygen Sensors found

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Kia Optima Oxygen Sensor Assembly, Rear
Part Number: 392102G200
$130.97 MSRP: $187.37
You Save: $56.40 (31%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Sensor Assembly-Oxygen,Rear
- Position: Rear
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2011-2015 Kia Optima | 2.0L - Theta 2, 2.4L - Theta 2 | Sedan - 4Door 5P
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Kia Optima Oxygen Sensor Assembly
Part Number: 392102G100
$260.20 MSRP: $374.50
You Save: $114.30 (31%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Sensor Assembly-Oxygen
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2011-2015 Kia Optima | 2.0L - Theta 2, 2.4L - Theta 2 | Sedan - 4Door 5P
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Kia Optima Oxygen Sensor Assembly
Part Number: 392102G240
$134.11 MSRP: $191.87
You Save: $57.76 (31%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Sensor Assembly-Oxygen
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2016-2020 Kia Optima | 2.4L - Theta 2 | Sedan - 4Door 5P
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Kia Optima Oxygen Sensor Assembly, Rear
Part Number: 392102G260
$134.11 MSRP: $191.87
You Save: $57.76 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor Assembly-Oxygen,Rear
- Position: Rear
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2016-2020 Kia Optima | 2.4L - Theta 2 | Sedan - 4Door 5P
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Kia Optima Oxygen Sensor Assembly, Rear
Part Number: 392102G560
$194.31 MSRP: $277.98
You Save: $83.67 (31%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Sensor Assembly-Oxygen,Rear; Oxygen Sensor, Rear Oxygen Sensor
- Position: Rear
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2011-2015 Kia Optima | 2.0L - Theta 2, 2.4L - Theta 2 | Sedan - 4Door 5P
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Kia Optima Oxygen Sensor Assembly, Front
Part Number: 392102B510
$212.38 MSRP: $303.85
You Save: $91.47 (31%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Sensor Assembly-Oxygen,Front; Front Oxygen Sensor, Oxygen Sensor
- Position: Front
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2019-2020 Kia Optima | 1.6L - GAMMA | Sedan - 4Door 5P
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Kia Optima Oxygen Sensor Assembly Right
Part Number: 3921037510
$187.32 MSRP: $267.99
You Save: $80.67 (31%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Sensor Assembly-Oxygen,Rh; Oxygen Sensor
- Position: Passenger Side
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2000-2005 Kia Optima | High Grade, Middle Grade | 2.7L | 4 Door Sedan
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Kia Optima Oxygen Sensor Assembly, Front
Part Number: 3921025300
$188.23 MSRP: $269.28
You Save: $81.05 (31%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Sensor Assembly-Oxygen,Front
- Position: Front
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2006-2008 Kia Optima | High Grade, Middle Grade | 2.4L, 2.4L - Theta FF | 4 Door Sedan, Sedan - 4Door 5P
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Kia Optima Oxygen Sensor Assembly
Part Number: 392102G370
$125.79 MSRP: $179.95
You Save: $54.16 (31%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Sensor Assembly-Oxygen
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2011-2013 Kia Optima | 2.0L - Theta 2, 2.4L - Theta 2 | Sedan - 4Door 5P
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Kia Optima Oxygen Sensor Assembly
Part Number: 392102B420
$128.67 MSRP: $184.08
You Save: $55.41 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor Assembly-Oxygen
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2016-2018 Kia Optima | 1.6L - GAMMA | Sedan - 4Door 5P
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Kia Optima Oxygen Sensor Assembly, Rear
Part Number: 392102G400
$152.51 MSRP: $218.18
You Save: $65.67 (31%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Sensor Assembly-Oxygen,Rear; Front Oxygen Sensor, Oxygen Sensor
- Position: Rear
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2008-2010 Kia Optima | 2.4L - Theta 2 | Sedan - 4Door 5P
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Kia Optima Oxygen Sensor Assembly, Left Upper
Part Number: 392103E130
$184.33 MSRP: $263.70
You Save: $79.37 (31%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Sensor Assembly-Oxygen,Lh (Upper); Front Oxygen Sensor, Oxygen Sensor
- Position: Upper Driver Side
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2006-2010 Kia Optima | High Grade, Middle Grade | 2.7L, 2.7L - MU | 4 Door Sedan, Sedan - 4Door 5P
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Kia Optima Oxygen Sensor Assembly, Rear
Part Number: 392102G550
$211.61 MSRP: $302.74
You Save: $91.13 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor Assembly-Oxygen,Rear
- Position: Rear
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2011-2013 Kia Optima | 2.0L - Theta 2, 2.4L - Theta 2 | Sedan - 4Door 5P
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Kia Optima Oxygen Sensor Assembly
Part Number: 392102G350
$252.77 MSRP: $363.80
You Save: $111.03 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor Assembly-Oxygen; Oxygen Sensor, Rear Oxygen Sensor
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2008-2010 Kia Optima | 2.4L - Theta 2 | Sedan - 4Door 5P
View related parts
Kia Optima Oxygen Sensor Assembly, Rear
Part Number: 392102GBA0
$128.67 MSRP: $184.08
You Save: $55.41 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor Assembly-Oxygen,Rear
- Position: Rear
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2016-2018 Kia Optima | 2.0L - Theta 2 | Sedan - 4Door 5P
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Kia Optima Oxygen Sensor Assembly, Left
Part Number: 3921037160
$151.87 MSRP: $210.94
You Save: $59.07 (28%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Sensor Assembly-Oxygen,Lh
- Position: Driver Side
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2000-2005 Kia Optima | High Grade, Middle Grade | 2.5L | 4 Door Sedan
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Kia Optima Oxygen Sensor Assembly, Front
Part Number: 392102G720
$233.81 MSRP: $336.52
You Save: $102.71 (31%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor Assembly-Oxygen,Front; Front Oxygen Sensor, Oxygen Sensor
- Position: Front
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2011-2015 Kia Optima | 2.0L - Theta 2 | Sedan - 4Door 5P
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Kia Optima Oxygen Sensor Assembly, Left Lower
Part Number: 392103E140
$155.07 MSRP: $221.85
You Save: $66.78 (31%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Sensor Assembly-Oxygen,Lh (Lower); Oxygen Sensor, Rear Oxygen Sensor
- Position: Lower Driver Side
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2006-2010 Kia Optima | High Grade, Middle Grade | 2.7L, 2.7L - MU | 4 Door Sedan, Sedan - 4Door 5P
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Kia Optima Oxygen Sensor Assembly, Right
Part Number: 392103E110
$175.85 MSRP: $251.57
You Save: $75.72 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor Assembly-Oxygen,Rh
- Position: Passenger Side
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2006-2010 Kia Optima | High Grade, Middle Grade | 2.7L, 2.7L - MU | 4 Door Sedan, Sedan - 4Door 5P
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Kia Optima Oxygen Sensor Assembly, Right
Part Number: 392103E120
$201.20 MSRP: $287.83
You Save: $86.63 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor Assembly-Oxygen,Rh
- Position: Passenger Side
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2006-2010 Kia Optima | High Grade, Middle Grade | 2.7L, 2.7L - MU | 4 Door Sedan, Sedan - 4Door 5P

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Kia Optima Oxygen Sensor

Oxygen Sensor found in Kia Optima automobiles is used to maintain the correct air/fuel ratio in the engine exhaust for better performance along with lowering the emission levels. Oxygen content in the exhaust as compared to the atmospheric air is converted by the sensor to voltage signal in order to tell either whether the mixture is rich or lean. This feedback enables the engine control computer to be able to alter the fuel injector pulse width in such a way that corresponds to the efficiency of the catalytic converter and least emission of fuel exhaust. Kia Optima vehicles mostly have at least two oxygen sensors, the one prior to the catalytic converter and the one following it, but the upstream sensor just is the feedback giving sensor. These sensors are usually mounted on high temperature locations and normally they fail due to contamination that leads to higher emission rates, thus making fuel efficiency to go down. Some recent vehicles can feature air/fuel ration sensors as the word 'oxygen' sensors, which can provide greater range for measurement and improve the fuel quality management.

If you're in search of top-notch, reasonably priced OEM Kia Optima Oxygen Sensor, then you've found the perfect spot. Our website boasts an extensive inventory of Kia Optima Oxygen Sensor, all priced at the market's premier price. Rest assured, every genuine part we offer comes with a warranty straight from the manufacturer.

Kia Optima Oxygen Sensor Parts Questions & Experts Answers

Oxygen Sensor Assembly, Front
3921025300
Q: What precautions should be taken when servicing an oxygen sensor on Kia Optima?
A: Special care is required when servicing an oxygen sensor due to the permanently attached pigtail and electrical connector that can't be removed from the sensor. Any damage to or removal of these components will ruin the sensor. It's important to keep grease, dirt and other contaminants away from the electrical connector and the oxygen sensor. Cleaning solvents of any kind should not be used on an oxygen sensor, and it should not be dropped or roughly handled. When replacing the sensor, note that it is installed in the exhaust manifold or Catalytic Converter, which contract when cool, making the sensor difficult to loosen when the engine is cold. To avoid damage, start and run the engine for a minute or two, then shut it off. The sensors are located at each primary catalytic converter near the exhaust manifolds and there is also a rear sensor in the exhaust pipe beneath the vehicle. If working on the rear sensor, raise the vehicle and support it securely on jackstands. This may ease things even if you're removing a front lower sensor. Remove any interfering components to provide wrench access to the sensor. These components vary greatly depending on your model year and the options installed. Disconnect the sensor pigtail and release the wiring from any retainers. Unscrew the sensor using a specialty socket. Some oxygen sensors that are mounted through heat shields have a large flange and require an oxygen sensor socket for removal. Special oxygen sensor sockets are available at most auto parts stores. Be careful to avoid damaging the hex on the sensor. Installation is the reverse of removal. Be sure to coat the threads of the oxygen sensor with anti-seize compound and tighten it to the torque.