# NGK Audi A4 2001-2000 Direct Fit Oxygen Sensor 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. - ADVANCED CERAMIC SENSOR ELEMENT: 3-stage contaminant-resistant plasma jet and deposit trap overcoat protects against element poisoning This Part Fits: Year Make Model Submodel 2000-2001 Audi A4 Base 2000-2001 Audi A4 Quattro Avant 2000-2001 Audi A4 Quattro Base 2000-2001 Audi A6 Base 2000-2001 Audi A6 Quattro Avant 2000-2004 Audi A6 Quattro Base 2001 Audi Allroad Quattro Base 2003 Audi RS6 Base 2001-2002 Audi S4 Avant 2000-2002 Audi S4 Base 2002-2003 Audi S6 Avant 2000 Volkswagen Passat 4 Motion 2003-2004 Volkswagen Passat GL 2000-2005 Volkswagen Passat GLS 2001-2002,2005 Volkswagen Passat GLS 4 Motion 2000-2005 Volkswagen Passat GLX 2001-2005 Volkswagen Passat GLX 4 Motion ## Details - **Price:** 245.07 CAD - **Vendor:** NGK - **Type:** Oxygen Sensors ## Variants | Variant | Price | Available | |---------|-------|-----------| | Default Title | 245.07 CAD | In stock | ## Images - Photo - Primary - Photo - Primary - Photo - out of package - Photo - out of package - Photo - out of package - Photo - out of package - Photo - out of package - Photo - out of package --- > Source: [Standard Auto Part](https://www.standardautopart.com/products/ngk-audi-a4-2001-2000-direct-fit-oxygen-sensor-1) > Updated: 2026-06-27