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Hella Oxygen Sensor 009166851 – Front (6-Pin, 800mm) for Audi & VW

HELLA
Availability:
Out of stock
SKU 009166851
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$69.95 - $69.95
$69.95
$69.95 - $69.95
$69.95
CALIFORNIA WARNING

Handling passenger or off-highway motor vehicle parts can expose you to chemicals such as phthalates and lead, which can cause cancer and reproductive harm. To minimize exposure, service the vehicle in a well-ventilated area, wear gloves, and wash your hands. For more information see www.P65Warnings.ca.gov/motor-vehicle-parts.

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The Hella oxygen sensor (009166851) is a front (pre-cat) lambda sensor designed for select Audi and Volkswagen models including A6 Quattro, S8, A8 Quattro, Touareg, and Passat. With a 6-pin connector and 800mm cable, it provides accurate exhaust gas measurement for improved engine efficiency and reduced emissions. Hella's OE-quality ensures long-lasting performance.

Key Features & Benefits

  • 6-Pin Connector: Matches specific Audi/VW applications.
  • 800mm Cable Length: Designed for front sensor location.
  • Pre-Catalytic Converter: Upstream position for precise regulation.
  • OE Replacement: Direct fit for reliable operation.

Vehicle Fitment

Make Model Years Engine
Audi A6 Quattro 2005–2011 4.2V8
Audi S8 2007 5.2V10
Audi A8 Quattro 2005–2007 6.0W12
Volkswagen Touareg 2004–2006 3.2V6
Volkswagen Passat 2002–2004 4.0W8

Technical Specifications

Part Number 009166851
Cable Length 800mm
Connector 6-pin
Position Front (Pre-cat)
Brand Hella

Installation Notes

Direct replacement for the front sensor location on compatible models.

About Hella

Hella is a leading automotive lighting and electronics manufacturer with OE-quality products.

This part also goes by the following cross reference.

Cross Reference Part Number:

Fits These Vehicles 5 applications
Audi
Make Model Engine Years
Audi A6 Quattro 4.2V8 2005–2011
Audi S8 5.2V10 2007–2007
Audi A8 Quattro 6.0W12 2005–2007
Volkswagen
Make Model Engine Years
Volkswagen Touareg 3.2V6 2004–2006
Volkswagen Passat 4.0W8 2002–2004
Fits 5 vehicle applications Check vehicle fitment before ordering View fitment

About this Oxygen Sensor

The HELLA 009166851 oxygen sensor measures the oxygen in the exhaust so the engine computer can keep the fuel mixture correct. Sensors before the catalytic converter control the mixture; sensors after it monitor the converter's efficiency.

Frequently asked questions

What does an oxygen sensor do?

It reports how rich or lean the exhaust is, and the engine computer adjusts fuel delivery in response. A faulty sensor can make the engine run too rich or too lean.

What are the signs of a failing oxygen sensor?

A check-engine light with oxygen-sensor or fuel-trim codes, poorer fuel economy, rough idle, or a failed emissions test. Exhaust leaks near the sensor can cause similar codes, so check for those too.

How do I know which sensor I need?

Sensors are specific to their position: upstream (before the catalytic converter) or downstream (after it), and on V engines, bank 1 or bank 2. The fault code usually identifies the position; check the product details for the position this sensor fits.

Can I replace an oxygen sensor myself?

Usually, yes, using an oxygen-sensor socket. Many new sensors come with anti-seize already on the threads; if not, use a sensor-safe compound only on the threads, and keep it off the sensor tip.

How do I make sure this oxygen sensor fits my car?

Compare the part numbers listed on this page with the number on your old part or in your vehicle's parts catalog, and check the fitment information. If you are unsure, contact us with your VIN before ordering.

Euromotiv is an independent retailer of OEM, Genuine, and aftermarket automotive parts. We are not affiliated with, endorsed by, or authorized by Audi AG, Volkswagen AG, BMW AG, Mercedes-Benz Group AG, Dr. Ing. h.c. F. Porsche AG, MINI, or any other vehicle manufacturer. All trademarks, logos, and brand names are the property of their respective owners and are used solely for identification and compatibility purposes.