2010 Infiniti M45 How to replace 234-5060 upstream oxygen sensor

The 2010 Infiniti M45 is a luxurious and high-performing vehicle known for its powerful engine and smooth ride. To maintain its optimal performance and fuel efficiency, regular maintenance and timely replacement of crucial components are essential. One such component is the 234-5060 Upstream Oxygen Sensor. In this article, we will provide a detailed guide on how to replace the 234-5060 Upstream Oxygen Sensor in the 2010 Infiniti M45.

Understanding the 234-5060 Upstream Oxygen Sensor

The 234-5060 upstream oxygen sensor is a critical part of the engine management system in the 2010 Infiniti M45. Positioned in the exhaust manifold, this sensor measures the oxygen content in the exhaust gases. The data it collects is sent to the engine control unit (ECU), which uses it to adjust the air-fuel mixture for efficient combustion. A properly functioning upstream oxygen sensor ensures that the engine operates at its peak performance, improves fuel efficiency, and reduces harmful emissions.

2010 Infiniti M45 Signs of a Failing 234-5060 Upstream Oxygen Sensor

Detecting signs of a failing upstream oxygen sensor in your 2010 Infiniti M45 is crucial for timely replacement. Some common indicators include a decrease in fuel efficiency, rough idling, a check engine light illumination, and reduced engine performance. If you notice any of these symptoms, it’s essential to address the issue promptly and replace the oxygen sensor if necessary.

2010 Infiniti M45  Step-by-Step Guide to Replace the 234-5060 Upstream Oxygen Sensor

Before starting the replacement process, ensure you have the necessary tools, including a socket wrench, oxygen sensor socket, penetrating oil, and safety gloves. Follow these steps to replace the upstream oxygen sensor:

Locate the sensor: The 234-5060 Upstream Oxygen Sensor is typically located in the exhaust manifold. Access it by raising the front of the 2010 Infiniti M45 and supporting it securely on jack stands.

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 the oxygen sensor socket and a socket wrench 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 wrench 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.


Regular maintenance and timely replacement of the 234-5060 Upstream Oxygen Sensor are essential to keep your 2010 Infiniti M45 operating at its best. By following the step-by-step guide provided in this article, you can ensure a smooth and efficient replacement process. Detecting and addressing any issues with the oxygen sensor promptly will help maintain your Infiniti M45’s performance, fuel efficiency, and environmental friendliness for years to come.

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