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Audi Oxygen Sensor – Downstream 078906265J – Denso 2344662
Audi Oxygen Sensor – Downstream 078906265J – Denso 2344662
Audi Oxygen Sensor – Downstream 078906265J – Denso 2344662
Audi Oxygen Sensor – Downstream 078906265J – Denso 2344662

Audi Oxygen Sensor – Downstream 078906265J – Denso 2344662

DENSO
Availability:
Out of stock
SKU 234-4662
Sold out
$103.95 - $103.95
$103.95
$103.95 - $103.95
$103.95
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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Direct replacement downstream oxygen sensor for select Audi A8 and A6 models. Designed by Denso, a leading OE supplier, this heated sensor monitors exhaust oxygen levels to optimize air-fuel ratio and reduce emissions. Features a threaded mount and male connector for easy installation.

Key Features & Benefits

  • Heated Design: Ensures fast activation and accurate readings during cold starts.
  • Threaded Mounting: Secure installation with standard 0.708-inch thread diameter.
  • Male Connector: Plug-and-play connection without splicing.
  • 100,000 Mile Lifespan: Long service life under normal driving conditions.
  • Direct Fit: No modifications required for listed Audi models.

Vehicle Fitment

Make Model Years Engine
Audi A8 Quattro 1997–1999 4.2V8
Audi A8 1997–1999 3.7V8
Audi A6 Quattro 1996–1998 2.8V6

Technical Specifications

OEM Part Number 078906265J
Denso Part Number 2344662
Sensor Type Heated
Thread Diameter 0.708 inches
Connector Gender Male
Mounting Type Threaded

Installation Notes

Direct-fit replacement; professional installation recommended for proper sensor position and torque.

About DENSO

Denso is a world leader in automotive thermal and powertrain systems, supplying OE-quality components to major manufacturers.

This part also goes by the following cross reference.

Cross Reference Part Number:

Fits These Vehicles 3 applications
Audi
Make Model Engine Years
No vehicles listed for this group.
Fits 3 vehicle applications Check vehicle fitment before ordering View fitment

About this Oxygen Sensor

The DENSO 234-4662 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.