Replacing the oxygen sensor on a Nissan Quest costs about $40-$50 and requires 30 minutes to 1 hour of labor. Before you start replacing the oxygen sensor you need to identify which oxygen sensor needs to be replaced.
Nissan Quest will have at least two oxygen sensors. One is upstream B1S1 of the catalytic converter, and one is downstream B1S2. In the following tutorial, we will show you how to replace the upstream sensor (Bank 1 Sensor 1).
The procedure is the same for the downstream O2 sensor (Bank 1 Sensor 2). For the downstream sensor, you will find it easier to access the O2 sensor from underneath the car.
When the oxygen sensor fails on your Quest, you may notice some or all of the following issues:
Park your Nissan Quest and open the hood.
Disconnect negative battery termnail.
Locate the oxygen sensor on your Nissan Quest. Here is the location of the upstream O2 sensor or Bank1 Sensor1.
The downstream oxygen Bank 1 Sensor 2 sensor has to be accessed from underneath the engine. You will need to remove the bottom splash shield.
Press the connector and pull it away to unplug the oxygen sensor.
Use an oxygen sensor wrench to remove oxygen sensor.
Install the new oxygen sensor. Tighten the oxygen sensor 35 lb-ft
Connect the oxygen sensor wire harness by simply plugging it in. If you are using a universal oxygen sensor you will need to use the diagram that came with the sensor to find out which wires to splice.