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Mustang Oxygen Sensor Replacement & Location Tech Guide

Created by Neal Jimenez / 2 min read
Last Updated: 9/1/2022

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  • Mustang Oxygen Sensor Replacement & Location Tech Guide

Oxygen sensors are a vital part of keeping your Mustang running properly. They provide essential information on the air/fuel ratio to your engine's computers. While oxygen sensors are designed to last upwards of 100,000 miles, oxygen sensors will eventually go out over time and will require replacement. This guide will help provide you with the location and information to allow you to change a faulty oxygen sensor.

Tools and Tips For Oxygen Sensor Installation & Removal

  • Spark Plug Removal Tools - When removing and installing oxygen sensors, some special tools can help you remove the sensors that are in tight spots. 
  • Penetrating Oil - Due to the extreme heat and composition of exhaust piping, oxygen sensors can become rusted or seized in the pipe. It is always a good practice when removing the old oxygen sensors to spray them with penetrating oil to ease the removal of the sensor. 
  • Anti-Seize Lubricant - When installing the new oxygen sensors, install high-temperature nickel anti-seize lubricant to help prevent the new sensor from becoming stuck in the exhaust piping. 
  • O2 Sensor Torque Spec - Mustang O2 sensors will be torqued to 30-35 ft/lb. 

1986-1995 Mustang 5.0L

Mustang Oxygen Sensor Replacement & Location Tech Guide - 86-95-mustang-o2-sensor-location


1994-2004 Mustang 3.8L

Mustang Oxygen Sensor Replacement & Location Tech Guide - mustang_38_o2_sensor


1996-2004 Mustang 4.6L

Mustang Oxygen Sensor Replacement & Location Tech Guide - 96_04_mustang-o2-sensor


2005-2010 Mustang 4.6L

Mustang Oxygen Sensor Replacement & Location Tech Guide - 05_10_mustang_o2_location


2011-2014 Mustang 5.0L

Mustang Oxygen Sensor Replacement & Location Tech Guide - 50_mustang_o2_sensor


2015-Current Mustang 5.0L

Front Right Hand Side

Mustang Oxygen Sensor Replacement & Location Tech Guide - s550_rh_o2_sensor

Rear Right Hand Side

Mustang Oxygen Sensor Replacement & Location Tech Guide - s550_rear_o2_sensor

Front Left Hand

Mustang Oxygen Sensor Replacement & Location Tech Guide - s550_mustang_lh_o2_sensor


2015-Current 2.3L Ecoboost

Upstream

Mustang Oxygen Sensor Replacement & Location Tech Guide - 23_mustang_upstream_o2

Downstream

Mustang Oxygen Sensor Replacement & Location Tech Guide - mustang_23_downstream_o2_sensor_ecoboost


Mustang Oxygen Sensor Frequently Asked Question 

 

How many oxygen sensors (O2) sensors does my Mustang Have?

  • 1986-1995 Mustang 5.0L Mustangs will have two sensors, while the newer 1996-Current 4.6L, 3.7L, 3.8L, 5.0L, 5.2L, 5.4L, and 5.8L engines will have four sensors. 2.3L Ecoboost engines will have technically have two sensors. 

Is it OK to drive with a faulty O2 Sensor?

  • Permanent damage to your catalytic converter can occur when driving with a faulty oxygen sensor. It is always best to replace a faulty O2 sensor as soon as possible. 

What are the symptoms of a faulty O2 Sensor?

  • Faulty oxygen sensors will cause the malfunction indicator lamp (MIL) to illuminate on your dash as well as you might experience your engine running roughly or stalling. 

What happens when an O2 sensor goes out?

  • When an oxygen sensor goes out, the engine power control module (PCM) will receive incorrect information, not allowing the air/fuel ratio (AFR) to be accurately measured. This can cause damage to the catalytic converters and the engine. 

What side are Bank 1 and Bank 2 on Ford Mustangs?

  • Bank 1 will be the passenger (RH) side. Bank 2 will be the driver (LH) side. 

Photo Reference - AllData
Thumbnail image of the author of this article, Neal Jimenez.

About the Author

Neal has owned a 1996 3.8L, 2003 3.8L (Cobra Swapped), 2003 GT, 1998 3.8L (4.6L SOHC Swapped), 1990 GT Hatchback, 1990 GT Convertible, 2006 GT Single Turbo, and 2011 Twin Turbo/Cammed GT. Read more...