URO Oxygen Sensor Pre-Catalytic Converter

The URO Oxygen Sensor Pre-Catalytic Converter (also called an upstream O2 sensor, front oxygen sensor, or air-fuel ratio sensor) is a replacement part for the exhaust system. It sits ahead of the catalytic converter. It measures the amount of oxygen in the exhaust gas as it leaves the engine and sends that signal to the engine control unit.

Key Features:

• Pre-catalytic converter (upstream) position for monitoring the exhaust gas before it reaches the catalyst
• Gives the engine computer the feedback it needs to adjust the air-fuel mixture
• Helps keep fuel economy, emissions control, and engine performance on track
• Replacement design intended to match the fit and function of the original equipment sensor
• Made by URO, a supplier of aftermarket replacement parts for European vehicles

A worn or failing upstream oxygen sensor can cause a check engine light, rough running, poor fuel economy, and higher emissions. Replacing it helps restore correct fuel trim and engine efficiency. Choose the child item that matches your application.