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DENSO Oxygen Sensor Downstream for Audi and Volkswagen Vehicles
DENSO Oxygen Sensor Downstream for Audi and Volkswagen Vehicles
DENSO Oxygen Sensor Downstream for Audi and Volkswagen Vehicles
DENSO Oxygen Sensor Downstream for Audi and Volkswagen Vehicles

DENSO Oxygen Sensor Downstream for Audi and Volkswagen Vehicles

DENSO
Availability:
Out of stock
SKU 234-4661
Sold out
$66.09 - $66.09
$66.09
$66.09 - $66.09
$66.09
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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This Denso downstream oxygen sensor provides precise exhaust monitoring to maintain optimal catalytic converter efficiency and engine performance. Designed for Audi A4/A6 and Volkswagen Passat models from the mid-to-late 1990s, it ensures accurate air-fuel ratio feedback. The heated element delivers reliable data and extended service life up to 100,000 miles.

Key Features & Benefits

  • Heated Sensor: Fast activation for accurate readings from cold start.
  • Threaded Mounting: Standard thread for secure installation.
  • Direct Fit: Replaces OEM part 078906265G and Denso 2344661.

Vehicle Fitment

Make Model Years Engine
Volkswagen Passat 1998–1999 2.8V6
Audi A6 Quattro 1998–1999 2.8V6
Audi A6 1998–1999 2.8V6
Audi A4 Quattro 1996–1999 2.8V6
Audi A4 1996–1999 2.8V6
Audi Cabriolet 1994–1998 2.8V6

Technical Specifications

Part Number 2344661
OEM Cross 078906265G

Installation Notes

Standard screw-in installation.

About DENSO

DENSO is a leading global automotive supplier known for high-quality OEM and aftermarket parts.

This part also goes by the following cross reference.

Cross Reference Part Number:

Fits These Vehicles 6 applications
Audi
Make Model Engine Years
No vehicles listed for this group.
Volkswagen
Make Model Engine Years
No vehicles listed for this group.
B5 Passat
Make Model Engine Years
Volkswagen Passat 2.8V6 1998–1999
C5 A6
Make Model Engine Years
Audi A6 Quattro 2.8V6 1998–1999
Audi A6 2.8V6 1998–1999
B5 A4
Make Model Engine Years
Audi A4 Quattro 2.8V6 1996–1999
Audi A4 2.8V6 1996–1999
B4 Cabriolet
Make Model Engine Years
Audi Cabriolet 2.8V6 1994–1998
Fits 6 vehicle applications Check vehicle fitment before ordering View fitment

About this Oxygen Sensor

The DENSO 234-4661 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.