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The NGK direct-fit oxygen sensor for Audi A4 Quattro (2009) restores accurate air-fuel sensing to the engine control system. As an OEM-quality NTK sensor, it supplies closed-loop feedback to the ECU to help maintain engine performance, improve fuel efficiency and reduce emissions while monitoring catalytic converter and fuel delivery status. NTK's ceramics-based design improves resistance to failure; a 3-stage contaminant-resistant plasma-jet element and deposit trap overcoat help protect against sensor poisoning for longer service life.
NGK Audi A4 Quattro 2009 Direct Fit Oxygen Sensor
