NTK is the world's largest supplier and manufacturer of OEM oxygen sensors. Oxygen sensors play a critical role as part of the vehicle's on-board diagnostic system in maintaining optimal engine performance, maximizing fuel efficiency and reducing harmful emissions. Providing constant closed loop feedback to the ECU, oxygen sensors help to control the air-fuel ratio while alerting OBDII systems of possible problems with fuel delivery or catalytic converter efficiency. A ceramics company at our core, NTK uses state-of-the art technology enabling control of the ceramic element used in our oxygen sensors from raw material to finished product. Trust The Sensor Specialist for full-line market support and OE application technology. NTK is constantly improving sensor designs to provide excellent performance and improve resistance to failure. NTK works with their OEM manufacturers through each phase of development from concept to production.

ADVANCED CERAMIC SENSOR ELEMENT: 3-stage contaminant-resistant plasma jet and deposit trap overcoat protects against element poisoning

The NGK Part 25173 is a high-quality direct fit oxygen sensor designed specifically for select Audi models, including A4 and A6 from 2005 to 2011. Engineered with advanced ceramic sensor elements, this sensor ensures precise monitoring of exhaust gases to help maintain optimal engine performance and fuel efficiency. Its contaminant-resistant plasma jet and deposit trap overcoat provide enhanced durability by protecting against element poisoning, making it a reliable component for your vehicle's emissions control system. Proper functioning of the oxygen sensor is critical for the vehicle's on-board diagnostic system (OBDII), as it provides real-time feedback to the ECU to regulate air-fuel mixture, reduce emissions, and optimize catalytic converter efficiency. Installing this sensor can help prevent engine misfires, improve fuel economy, and reduce harmful emissions. The NGK sensor is manufactured with strict quality standards, ensuring compatibility with your vehicle and long-lasting performance. Whether you're performing routine maintenance or replacing a faulty sensor, this part offers a straightforward installation and dependable operation. Trust NGK, a leader in automotive sensors, for OE-quality parts that meet or exceed original equipment specifications.

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