# NGK Audi A4 2006-2001 Direct Fit 5-Wire Wideband A/F 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. While conventional switching oxygen sensors only switch rich or lean, wideband oxygen (or Air-Fuel Ratio) sensors produce a linear output signal that allows the ECU determine exactly how rich or lean an engine is running and make continuous and precise adjustments of the air-fuel mixture to stay closest to stoichiometric, providing the best possible combustion and fewest emissions. A ceramics company at our core, NTK uses state-of-the art technology enabling complete control of the ceramics used in our wideband 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

2001-2005

Audi

A4

Base

2003-2006

Audi

A4

Cabriolet

2001-2005

Audi

A4 Quattro

Avant

2001-2005

Audi

A4 Quattro

Base

2005-2006

Audi

A8 Quattro

Base

2004-2006

Audi

A8 Quattro

L

2004-2006

Audi

TT Quattro

Base

2006

Audi

TT Quattro

Special Edition

2003-2006

BMW

325Ci

Base

2003-2005

BMW

325i

Base

2004-2005

BMW

545i

Base

2004-2005

BMW

645Ci

Base

2003-2006

Porsche

Cayenne

S

2001-2005

Volkswagen

Beetle

GL

2001-2005

Volkswagen

Beetle

GLS

2001-2002

Volkswagen

Beetle

Sport

2001-2006

Volkswagen

Golf

GL

2001-2006

Volkswagen

Golf

GLS

2000-2005

Volkswagen

Jetta

GL

2000-2005

Volkswagen

Jetta

GLS

2003-2005

Volkswagen

Passat

GL

2001-2005

Volkswagen

Passat

GLS

2004-2005

Volkswagen

Passat

GLS 4 Motion

## Details

- **Price:** 266.68 CAD
- **Vendor:** NGK
- **Type:** Oxygen Sensors

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 266.68 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

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/ngk-audi-a4-2006-2001-direct-fit-5-wire-wideband-a-f-sensor)
> Updated: 2026-06-27