Denso 234-4646 Oxygen Sensor OE-Replacement

By Denso

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$ 74.75 In Stock

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Description & Features+

Denso 234-4646 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. As the automotive industry continues to improve on their standards DENSO is keeping the pace with advancements in our engineering to meet the demands from the industry. Also, as car owners are holding on to their vehicles for longer periods, DENSO continues to make auto parts available for those critical replacement parts for all applications. 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 drivability 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.


  • Stainless Steel Housing Resists Corrosion And Contamination With A Rugged, Watertight Body
  • Robotic Laser Weld
  • Porous PTFE Filter Blocks Efficiency-Robbing Contaminants
  • Refined Zirconia Element Improves Sensor Response
  • Double Protection Cover Maintains Proper Unit Temperature For Quicker Response Times And Protects The Ceramic Element Against Silicone And Lead Poisoning
  • Aluminum-Oxide Trap Layer Keeps Silicone And Lead Outside The Ceramic Element Through 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:

  • 2005 - 2009 Buick LaCrosse
  • 2004 - 2005 Buick LeSabre
  • 2006 - 2008 Buick Lucerne
  • 2004 - 2005 Buick Park Avenue
  • 2004 - 2004 Buick Regal
  • 1998 - 1999 Chevrolet Astro
  • 2002 - 2005 Chevrolet Cavalier
  • 2004 - 2005 Chevrolet Classic
  • 2005 - 2007 Chevrolet Cobalt
  • 2004 - 2005 Chevrolet Impala
  • 2004 - 2005 Chevrolet Malibu
  • 2004 - 2005 Chevrolet Monte Carlo
  • 1998 - 1999 GMC Safari
  • 2002 - 2004 Oldsmobile Alero
  • 2004 - 2005 Pontiac Bonneville
  • 2002 - 2005 Pontiac Grand Am
  • 2004 - 2008 Pontiac Grand Prix
  • 2002 - 2005 Pontiac Sunfire
  • 2003 - 2007 Saturn Ion
  • 2002 - 2002 Saturn L100
  • 2002 - 2003 Saturn L200
  • Specifications+

    Product Identifiers
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    Return Policy+

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     > Return Policy

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

    There are two easy ways to return this item:

    • Return this item to a Walmart store
    • Return this item by mail

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