Denso 234-4078 Oxygen Sensor OE-Replacement



Denso 234-4078 Oxygen Sensor OE-Replacement

DENSO's light duty oxygen sensor started to appear on vehicles with the development of fuel injection systems. The basic job of the sensor is to monitor the air fuel mixture under idle, moderate Acceleration and cruise conditions. Under heavy Acceleration the oxygen sensor goes into open loop, which basically means that the engine management computer system ignores the oxygen sensor. Oxygen sensors have a smaller range of limits in detecting and adjusting the difference from an optimum air/fuel ratio. Oxygen sensors, also known as Lambda sensors or oxygen sensors among some vehicle manufacturers, are among the most sensitive and critical components on your car's engine. Earlier fuel injection systems employed one oxygen sensor in the exhaust system to maintain closed-loop air/fuel mixture control. However, today's engines may use as many as four sensors, which monitor not only exhaust gas oxygen content but catalytic converter efficiency as well. In order to perform these functions properly, the sensors must adhere to OE standards within incredibly close tolerances. A malfunctioning or incorrectly calibrated oxygen sensor can hurt driveability and illuminate the malfunction indicator, resulting in costly and time-consuming repairs. DENSO First Time Fit® oxygen sensors are designed to meet those tolerances and more.


  • Corrosion-Resistant Stainless Steel Construction
  • Porous PTFE Filter - Allows Atmospheric Oxygen To Enter The Sensor Without Permitting Water Or Engine Contaminants To Seep Into The Casing
  • Refined Zirconia Element Improves Sensor Response
  • Robotic Laser Weld
  • Double Protection Cover - Maintains Proper Unit Temperature For Quicker Response Times And Protects The Ceramic Element Against Silicone And Lead Poisoning
  • Stainless Steel Housing - Resists Corrosion And Contamination With A Rugged, Watertight Body
  • Aluminum-Oxide Trap Layer - Keeps Silicone And Lead Outside The Ceramic Element Through DENSO's Exclusive Design, Preventing Damage To The Platinum Electrode
  • Superior Design Maximizes Engine Performance While Reducing Fuel Consumption And Harmful Emissions
  • Ensures Smog Test Compliance
  • Limited 90 Day Warranty

  • Specifications:

    Type: Heated
    Connector Style: 4 Wire
    Voltage Range: OEM
    Includes Adapter Fittings: No
    Includes Weather Pack Harness: Yes
    Includes Weld Fitting: No

    This product is designed to fit the following vehicles:

  • 1999 - 2004 Chrysler 300M
  • 1999 - 2000 Chrysler Cirrus
  • 1998 - 2004 Chrysler Concorde
  • 1999 - 2001 Chrysler LHS
  • 2001 - 2002 Chrysler Prowler
  • 1998 - 1998 Chrysler Sebring
  • 2001 - 2004 Chrysler Sebring
  • 1997 - 1997 Dodge B1500
  • 1997 - 1997 Dodge B2500
  • 1996 - 1997 Dodge B3500
  • 1997 - 2000 Dodge Dakota
  • 1998 - 2000 Dodge Durango
  • 1998 - 2004 Dodge Intrepid
  • 2000 - 2002 Dodge Neon
  • 1998 - 2004 Dodge Stratus
  • 1996 - 2001 Jeep Cherokee
  • 1994 - 2000 Jeep Grand Cherokee
  • 1997 - 2000 Jeep Wrangler
  • 1998 - 2000 Plymouth Breeze
  • 2000 - 2001 Plymouth Neon
  • 1997 - 1997 Plymouth Prowler
  • From the manufacturer


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    Return policy
    You can return this item within 90 days from the day you receive your online order.

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