2010 Infiniti M45: 234-5060 upstream oxygen sensor replacement Overview

The 2010 Infiniti M45 is a luxury sedan known for its powerful performance and sophisticated features. To maintain its optimal engine efficiency and comply with emission standards, regular maintenance and timely replacement of components are essential. One critical component that deserves attention is the 234-5060 upstream oxygen sensor. In this article, we will provide an overview of the replacement process for this vital sensor in the 2010 Infiniti M45.

Understanding the 234-5060 Upstream Oxygen Sensor

The 234-5060 upstream oxygen sensor is a significant part of the emission control system in the 2010 Infiniti M45. Positioned in the exhaust manifold before the catalytic converter, this sensor measures the oxygen content in the exhaust gases. The data collected by the upstream oxygen sensor is sent to the engine control unit (ECU), enabling it to adjust the air-fuel mixture for efficient combustion. By maintaining the correct air-fuel ratio, the sensor ensures optimal engine performance and reduced harmful emissions.

Signs of a Failing 234-5060 upstream oxygen sensor

Detecting signs of a failing 234-5060 upstream oxygen sensor in your 2010 Infiniti M45 is crucial for timely replacement. Some common indicators of a faulty sensor include decreased fuel efficiency, rough engine idling, and an illuminated check engine light. Additionally, you may notice a decrease in engine performance and increased exhaust emissions. Regularly monitoring these signs can help you identify sensor issues early and prevent further engine damage.

2010 Infiniti M45 Replacing the 234-5060 upstream oxygen sensor

Replacing the 234-5060 upstream oxygen sensor in the 2010 Infiniti M45 requires careful attention and appropriate tools. Here’s an overview of the steps involved:

Locate the sensor: The 234-5060 upstream oxygen sensor is typically situated in the exhaust manifold. Locate the sensor by following the exhaust pipe from the engine.

Disconnect the electrical connector: Carefully detach the electrical connector that connects the oxygen sensor to the wiring harness. Gently press the tab and pull the connector apart.

Remove the sensor: Use an oxygen sensor socket and a ratchet to loosen and remove the sensor from the exhaust manifold. Apply penetrating oil if the sensor is challenging to remove due to corrosion.

Install the new sensor: Take the new 234-5060 upstream oxygen sensor and screw it into the exhaust manifold by hand. Then, use the oxygen sensor socket and ratchet to tighten it securely.

Reconnect the electrical connector: Once the new sensor is in place, reattach the electrical connector to the sensor’s wiring harness.

Test the replacement: Start the engine and check if the check engine light is off. The replacement should be successful if there are no error codes related to the oxygen sensor.


The 234-5060 upstream oxygen sensor plays a crucial role in the emission control system of the 2010 Infiniti M45. By continuously monitoring the air-fuel ratio and providing valuable data to the ECU, the sensor ensures efficient combustion, reduced emissions, and optimal engine performance. Regular maintenance and timely replacement of the upstream oxygen sensor will keep your Infiniti M45 running smoothly and environmentally friendly for years to come.

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