# NGK Audi A4 2009-2005 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

2005-2008

Audi

A4

Base

2007-2009

Audi

A4

Cabriolet

2005-2008

Audi

A4 Quattro

Avant

2005-2008

Audi

A4 Quattro

Base

2007-2009

Audi

A4 Quattro

Cabriolet

2009-2012

Porsche

911

Carrera

2009-2012

Porsche

911

Carrera 4

2012

Porsche

911

Carrera 4 GTS

2009-2012

Porsche

911

Carrera 4S

2011-2012

Porsche

911

Carrera GTS

2009-2012

Porsche

911

Carrera S

2010-2011

Porsche

911

GT3

2010-2011

Porsche

911

GT3 RS

2011

Porsche

911

GT3 RS 4.0

2011

Porsche

911

Speedster

2009-2012

Porsche

911

Targa 4

2009-2012

Porsche

911

Targa 4S

2009-2012

Porsche

Boxster

Base

2009-2012

Porsche

Boxster

S

2012

Porsche

Boxster

S Black Edition

2009

Porsche

Boxster

S Porsche Design 2

2011-2012

Porsche

Boxster

Spyder

2008-2010,2013-2014

Porsche

Cayenne

GTS

2008-2014

Porsche

Cayenne

S

2010

Porsche

Cayenne

S Transsyberia

2009-2012

Porsche

Cayman

Base

2012

Porsche

Cayman

R

2009-2012

Porsche

Cayman

S

2014-2016

Porsche

Panamera

4S

2014-2016

Porsche

Panamera

4S Executive

2014-2016

Porsche

Panamera

S

## Details

- **Price:** 272.28 CAD
- **Vendor:** NGK
- **Type:** Oxygen Sensors

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 272.28 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-a4-2009-2005-direct-fit-5-wire-wideband-a-f-sensor)
> Updated: 2026-06-27