How does an oxygen sensor function and what are the key considerations for its installation and maintenance on Mitsubishi Galant?

The oxygen sensor is a galvanic battery that generates a small voltage depending on the oxygen content of the exhaust gas. This voltage input is included in the feedback loop with the PCM to maintain the ideal air/fuel ratio of 14.7:1 for ideal catalyst operation. OBD-II systems on vehicles built from 1996 onwards make use of two oxygen sensors (one before and one after the catalytic converter), use to monitor the efficiency of the converter and predict failures. There are usually two heated oxygen sensors in four cylinder models. The upstream or pre-catalytic converter sensor is located in the front exhaust pipe or exhaust manifold. Many V6 models have either two or four oxygen sensors depending on model year and configuration. The upstream sensor is typically in the exhaust manifold, while the downstream sensor is on the front exhaust pipe or between the catalytic converters. One oxygen sensor is usually positioned downstream of each catalytic converter. All oxygen sensors are heated to improve warm-up time, and care must be exercised during service so that either oxygen soldering beads or connectors will not be damaged. When changing a sensor, it is recommended to warm up the engine to facilitate removal, switch off the ignition, and raise the vehicle securely if required. The oxygen sensor must not be damaged by using a special oxygen sensor socket to unscrew the sensor. Also, the electrical connector must be disconnected. When reusing a sensor, it's best practice to apply anti-seize to the threads. Next, install the sensor and reconnect the electrical harness. Finally, take a test drive to check for trouble codes.

Genuine Mitsubishi Oxygen Sensor

Oxygen O2 Sensor

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49 Oxygen Sensors found

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Mitsubishi Oxygen Sensor Part Number: MN158670
$261.72 MSRP: $369.68
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Product Specifications
- Other Name: Sensor, Engine Control Oxygen
Fits the following Mitsubishi Models:
- Montero | 2004-2006 | Limited, XLS | 6 Cyl 3.8 L GAS
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Mitsubishi Oxygen Sensor Part Number: MN158671
$269.59 MSRP: $380.79
You Save: $111.20 (30%)
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Product Specifications
- Other Name: Sensor, Engine Control Oxygen
Fits the following Mitsubishi Models:
- Montero | 2004-2006 | Limited, XLS | 6 Cyl 3.8 L GAS
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Mitsubishi Oxygen Sensor Part Number: MR578634
$279.60 MSRP: $394.92
You Save: $115.32 (30%)
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Product Specifications
- Other Name: Sensor, Engine Control Oxygen
Fits the following Mitsubishi Models:
- Lancer | 2002-2007 | ES, LS, OZ Rally, SE | 4 Cyl 2.0 L GAS
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Mitsubishi Rear Oxygen Sensor Part Number: 1588A654
$282.33 MSRP: $398.77
You Save: $116.44 (30%)
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Product Specifications
- Other Name: Sensor, Engine Control Oxygen; Oxygen Sensor
Fits the following Mitsubishi Models:
- Outlander | 2022-2025 | Black Edition, ES, SE, SE Launch Edition, SEL, SEL Launch Edition | 4 Cyl 2.5 L GAS
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Mitsubishi Oxygen Sensor Part Number: 1588A567
$295.13 MSRP: $416.85
You Save: $121.72 (30%)
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Product Specifications
- Other Name: Sensor, Engine Control Oxygen; Rear Oxygen Sensor
Fits the following Mitsubishi Models:
- Outlander PHEV | 2023-2025 | ES, Platinum Edition, Ralliart, SE, SE Tech, SEL, SEL Premium, SEL Touring | 4 Cyl 2.4 L PLUG-IN HYBRID EV-GAS (PHEV)
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Mitsubishi Oxygen Sensor Part Number: 22690W040P
$295.35 MSRP: $417.17
You Save: $121.82 (30%)
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Product Specifications
- Other Name: Sensor, Engine Control Oxygen
Fits the following Mitsubishi Models:
- Eclipse Cross | 2024-2025 | Black Edition, ES, LE, Ralliart, SE, SEL, SEL Touring | 4 Cyl 1.5 L GAS
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Mitsubishi Lower Oxygen Sensor Part Number: 1588A276
$318.26 MSRP: $449.52
You Save: $131.26 (30%)
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Product Specifications
- Other Name: Sensor, Engine Control Oxygen; Oxygen Sensor
Fits the following Mitsubishi Models:
- Mirage | 2014-2015 | DE, ES, RF | 3 Cyl 1.2 L GAS
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Mitsubishi Oxygen Sensor Part Number: 22690W030P
$325.17 MSRP: $459.28
You Save: $134.11 (30%)
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Product Specifications
- Other Name: Sensor, Engine Control Oxygen; Rear Oxygen Sensor
Fits the following Mitsubishi Models:
- Outlander Sport | 2022-2025 | ES, GT, GT Special Edition, LE, Ralliart, S, SE, SE Special Edition, SEL, Trail Edition | 4 Cyl 2.0 L GAS, 4 Cyl 2.4 L GAS
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Mitsubishi Oxygen Sensor Part Number: MN158918
$336.44 MSRP: $475.20
You Save: $138.76 (30%)
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Product Specifications
- Other Name: Sensor, Engine Control Oxygen
Fits the following Mitsubishi Models:
- Montero Sport | 2004 | LS, XLS | 6 Cyl 3.5 L GAS
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Mitsubishi Oxygen Sensor Part Number: MN158773
$338.87 MSRP: $478.63
You Save: $139.76 (30%)
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Product Specifications
- Other Name: Sensor, Engine Control Oxygen
Fits the following Mitsubishi Models:
- Lancer | 2004-2007 | ES, LS, OZ Rally, SE | 4 Cyl 2.0 L GAS
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Mitsubishi Front Oxygen Sensor Part Number: 1588A565
$339.30 MSRP: $479.23
You Save: $139.93 (30%)
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Product Specifications
- Other Name: Sensor, Engine Control Line; Oxygen Sensor
Fits the following Mitsubishi Models:
- Outlander PHEV | 2023-2025 | ES, Platinum Edition, Ralliart, SE, SE Tech, SEL, SEL Premium, SEL Touring | 4 Cyl 2.4 L PLUG-IN HYBRID EV-GAS (PHEV)
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Mitsubishi Oxygen Sensor Part Number: MN163470
$353.45 MSRP: $499.22
You Save: $145.77 (30%)
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Product Specifications
- Other Name: Sensor, Engine Control Oxygen
Fits the following Mitsubishi Models:
- Lancer | 2004-2005 | ES, LS, OZ Rally, Ralliart, Sportback, Sportback Ralliart | 4 Cyl 2.0 L GAS, 4 Cyl 2.4 L GAS
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Mitsubishi Oxygen Sensor Part Number: MN158916
$353.76 MSRP: $499.67
You Save: $145.91 (30%)
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Product Specifications
- Other Name: Sensor, Engine Control Oxygen
Fits the following Mitsubishi Models:
- Montero | 2004-2006 | Limited, XLS | 6 Cyl 3.8 L GAS
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Mitsubishi Oxygen Sensor Part Number: MN158919
$353.92 MSRP: $499.88
You Save: $145.96 (30%)
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Product Specifications
- Other Name: Sensor, Engine Control Oxygen
Fits the following Mitsubishi Models:
- Montero Sport | 2004 | LS, XLS | 6 Cyl 3.5 L GAS
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Mitsubishi Rear Oxygen Sensor Part Number: 1588A144
$375.12 MSRP: $529.83
You Save: $154.71 (30%)
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Product Specifications
- Other Name: Sensor, Engine Control Oxygen; Oxygen Sensor
Fits the following Mitsubishi Models:
- Lancer | 2008-2017 | DE, ES, ES Sportback, Evolution GSR, Evolution MR, Evolution MR Touring, Evolution SE, GT, GT Sportback, GTS, GTS Sportback, Ralliart, Ralliart Sportback, SE, SEL | 4 Cyl 2.0 L GAS, 4 Cyl 2.4 L GAS
- Outlander | 2008-2013 | ES, SE | 4 Cyl 2.4 L GAS
- Outlander Sport | 2015-2021, 2011-2013 | BE, ES, GT, LE, S, SE, SEL, SP | 4 Cyl 2.0 L GAS, 4 Cyl 2.4 L GAS
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Mitsubishi Oxygen Sensor Part Number: MN158917
$382.43 MSRP: $540.16
You Save: $157.73 (30%)
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Product Specifications
- Other Name: Sensor, Engine Control Oxygen
Fits the following Mitsubishi Models:
- Montero | 2004-2006 | Limited, XLS | 6 Cyl 3.8 L GAS
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Mitsubishi Upper Oxygen Sensor Part Number: 1588A260
$382.85 MSRP: $540.74
You Save: $157.89 (30%)
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Product Specifications
- Other Name: Sensor, Engine Control Line; Wideband Air/Fuel Sensor; Air / Fuel Ratio Sensor; Air/Fuel Sensor; Oxygen Sensor
Fits the following Mitsubishi Models:
- Mirage | 2014-2015 | DE, ES, RF | 3 Cyl 1.2 L GAS
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Mitsubishi Upper Oxygen Sensor, Driver Side Part Number: 1588A273
$384.28 MSRP: $542.77
You Save: $158.49 (30%)
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Product Specifications
- Other Name: Sensor, Engine Control Line; Wideband Air/Fuel Sensor; Air / Fuel Ratio Sensor; Air/Fuel Sensor; Oxygen Sensor
- Position: Driver Side
Fits the following Mitsubishi Models:
- Outlander | 2014-2015 | GT | 6 Cyl 3.0 L GAS
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Mitsubishi Upper Oxygen Sensor Part Number: 1588A359
$384.85 MSRP: $543.57
You Save: $158.72 (30%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Sensor, Engine Control Oxygen; Oxygen Sensor
Fits the following Mitsubishi Models:
- Mirage | 2017-2024 | BE, Black Edition, Carbonite Edition, ES, GT, LE, RF, SE | 3 Cyl 1.2 L GAS
- Mirage G4 | 2017-2024 | BE, Carbonite Edition, ES, LE, RF, SE | 3 Cyl 1.2 L GAS
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Mitsubishi Oxygen Sensor, Driver Side Part Number: 1588A081
$394.03 MSRP: $556.53
You Save: $162.50 (30%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Sensor, Engine Control Oxygen
- Position: Driver Side
Fits the following Mitsubishi Models:
- Outlander | 2007-2013 | ES, GT, LS, SE, XLS | 4 Cyl 2.4 L GAS, 6 Cyl 3.0 L GAS

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Mitsubishi Oxygen Sensor

The function of the Mitsubishi Oxygen Sensor is to report the exhaust oxygen level continuously. This allows the engine computer to adjust the fuel in real-time. Thus, it keeps the combustion clean and efficient, ultimately cutting emissions and saving fuel. Mitsubishi was born from a legacy that began with steamships and went on to the Model A sedan. It now combines MIVEC engines and Super All Wheel Control with user-friendly smartphone integration to instill drivers with confidence for easy handling. The company is also experimenting with plug-in hybrids and future powertrains while invariably looking for smart features to make everyday journeys simpler and greener. The good things go to show the company philosophy that emphasizes reliability, fast-acting response, and smart technology to cope with varying road conditions around the world. The Oxygen Sensor, housed in a stout steel casing, protects an element of zirconium dioxide that reaches temperatures of about 600 degrees Fahrenheit. The little openings allow the exhaust as well as the outside air to come into contact with the ceramic. The subsequent movement of oxygen ions generates a voltage. This voltage turns from lean to rich within milliseconds. The engine computer trims the injector pulse width in response to operating conditions. This keeps the air-fuel mixture ideal to ensure the cat remains in its sweet spot. A second Oxygen Sensor located after the catalytic converter confirms the health of the converter, ensuring that the vehicle stays within legal limits and does not lose power. This small unit will help the entire Mitsubishi family, when clean and working, with lower emissions, better mileage, and smoother power delivery.

Pick genuine OEM Oxygen Sensor if you want superb performance and durability that lasts. Mitsubishi builds that using high-grade materials and official factory techniques to meet very strict standards. This means you get parts you can actually trust for your daily drive. Finding the right parts is simple in the massive stock of genuine inventory. You can stop guessing if a part will fit or hold up. You will love the low prices, dependable service and the real manufacturer's warranty on Mitsubishi Oxygen Sensor. Order today and the store will ship your brand-new items to your door as fast as possible.

Mitsubishi Oxygen Sensor Parts Questions & Experts Answers

Oxygen Sensor, Passenger Side
MR507386
Q: How does an oxygen sensor function and what are the key considerations for its installation and maintenance on Mitsubishi Galant?
A:
The oxygen sensor is a galvanic battery that generates a small voltage depending on the oxygen content of the exhaust gas. This voltage input is included in the feedback loop with the PCM to maintain the ideal air/fuel ratio of 14.7:1 for ideal catalyst operation. OBD-II systems on vehicles built from 1996 onwards make use of two oxygen sensors (one before and one after the catalytic converter), use to monitor the efficiency of the converter and predict failures. There are usually two heated oxygen sensors in four cylinder models. The upstream or pre-catalytic converter sensor is located in the front exhaust pipe or exhaust manifold. Many V6 models have either two or four oxygen sensors depending on model year and configuration. The upstream sensor is typically in the exhaust manifold, while the downstream sensor is on the front exhaust pipe or between the catalytic converters. One oxygen sensor is usually positioned downstream of each catalytic converter. All oxygen sensors are heated to improve warm-up time, and care must be exercised during service so that either oxygen soldering beads or connectors will not be damaged. When changing a sensor, it is recommended to warm up the engine to facilitate removal, switch off the ignition, and raise the vehicle securely if required. The oxygen sensor must not be damaged by using a special oxygen sensor socket to unscrew the sensor. Also, the electrical connector must be disconnected. When reusing a sensor, it's best practice to apply anti-seize to the threads. Next, install the sensor and reconnect the electrical harness. Finally, take a test drive to check for trouble codes.