Air Fuel Ratio Sensor.
Oxygen Sensor.

• Monitors the air-to-fuel ratio within your engine
• Can become worn over time or damaged by a fluid leak
• Replacement by an INFINITI professional is recommended

Your vehicle's combustion system depends on a variety of sensors to preserve optimal conditions for performance. One of these mechanisms if the Oxygen Sensor. Originally, they were introduced to help control and curb emissions, and are now standard in most modern vehicles. Depending on the INFINITI model and year you own, your engine may have one or more sensors.

Your Oxygen Sensors help measure the air-to-fuel mixture, helping your engine's internal computer regulate the ratio depending on whether your engine is burning rich (too little oxygen) or too much oxygen (burning lean). Having the incorrect ratio of air-to-fuel may negatively affect the combustion engine, leading to poorer fuel efficiency and more emissions. That's why it's a good idea to have a high-quality INFINITI Oxygen Sensor.

An Oxygen Sensor makes electricity, and the voltage it renders depends on what the exhaust system is producing. Simply put, the electricity generated by your INFINITI O2 sensor fluctuates with changes in the air-fuel ratio. When the system notes a variance in voltage, your INFINITI's computer makes adjustments to the fuel mixtures to keep your INFINITI running as intended.

Your vehicle's O2 sensor may require a replacement due to age and wear. In certain circumstances, your car may need a premature O2 sensor replacement if it comes in contact with coolant or oil due to leaks or other contaminants. Some telltale signs that indicate the need for a new Oxygen Sensor are: cylinder misfires, rough idling, poor gas mileage, and an illuminated dashboard warning light.

Since the majority of modern cars rely on multiple O2 sensors to moderate the combustion process, it can be hard for vehicle owners to diagnose and repair this issue at home. In some cases, the repair involves at a specialized scanner and inspecting the undercarriage by jacking up the vehicle. That's why many INFINITI owners choose to get their Oxygen Sensor replacement services from their local INFINITI experts.

Are you noticing common signs of Oxygen Sensor failure? Order an authentic Oxygen Sensor for your INFINITI EX35, INFINITI FX35, INFINITI G35, INFINITI G37, INFINITI G37X, INFINITI M35, or INFINITI M45. See the What This Fits tab for more fitment info.