If your 2011-2014 Mustang's check engine light has recently come on and the engine is having trouble keeping a smooth idle, or you have noticed a drop in MPG, you may want to replace your rear oxygen sensor. Over time, factory oxygen sensors tend to go bad and need to be replaced, this Ford Rear Oxygen Sensor is an OEM direct replacement part for your faulty driver side or passenger side rear oxygen sensor.
The oxygen sensor, or O2 sensor, is required to measure the amount of oxygen in the exhaust and deliver the information to your Mustang's computer. The computer then uses this information to adjust air-fuel ratios to keep your engine running smoothly and perform the way it should. A faulty oxygen sensor could prevent your Mustang from passing inspection.
This Ford Rear Oxygen Sensor is a great part to pick up when you are replacing your factory H-pipe with a new high flow X-pipe or H-pipe.
*Sold individually. Two are required per Mustang.
*Fits 2011 5.0L Mustangs built after 04/08/2011.