Honda Civic 2016: Upstream oxygen sensor 36532-5AA-A51 replacement Overview

The Honda Civic 2016 is a popular and reliable compact car known for its fuel efficiency and practicality. Like all vehicles, regular maintenance is essential to ensure optimal performance and longevity. One critical component that can impact the Civic’s engine efficiency is the upstream oxygen sensor 36532-5AA-A51. In this article, we will provide an overview of the replacement process for this crucial sensor in the Honda Civic 2016.

Understanding the Upstream Oxygen Sensor 36532-5AA-A51

The upstream oxygen sensor 36532-5AA-A51 is a vital part of the Honda Civic 2016’s emission control system. Located 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), allowing the ECU to adjust the air-fuel mixture for efficient combustion. A properly functioning upstream oxygen sensor ensures that the engine operates at its peak performance and reduces harmful emissions.

Signs of a Failing Upstream Oxygen Sensor 36532-5AA-A51

Identifying a failing upstream oxygen sensor in your Honda Civic 2016 is crucial for timely replacement. Some common signs of a faulty sensor include a decrease in fuel efficiency, rough idling, and a check engine light illumination. Additionally, you may notice a decrease in engine performance and increased exhaust emissions. Regularly monitoring these signs can help you detect sensor issues early and prevent further engine damage.

Replacing the Upstream Oxygen Sensor 36532-5AA-A51

Replacing the upstream oxygen sensor 36532-5AA-A51 in the Honda Civic 2016 is a relatively straightforward process. Here’s a general overview of the steps involved:

Locate the sensor: The upstream oxygen sensor is typically located in the Honda Civic 2016 is 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 upstream oxygen sensor 36532-5AA-A51 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 upstream oxygen sensor 36532-5AA-A51 is a critical component in the Honda Civic 2016’s emission control system. By understanding its role, detecting signs of failure, and following the replacement process, you can ensure that your Civic’s engine operates efficiently and complies with emission regulations. Regular maintenance and timely replacement of the upstream oxygen sensor will keep your Honda Civic 2016 running smoothly for years to come.

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