Oxygen Sensor - Direct Fit
Hover over the image to zoom in
Share this:

Denso Oxygen Sensor - Direct Fit

Part No. 234-4738 Warranty Details  

See if this part fits a specific vehicle.

Check Vehicle Fit

Designed to meet the increasing demands of today's engines. Each of our oxygen sensors is constructed of the highest quality materials available. High-quality stainless steel, porous polytetrafluoroethylene (PTFE), fluorine rubber, aluminum oxide, high-grade platinum and ceramics are used in each Denso sensor.
Back To Top
Connector Gender:Male
Connector Type:Direct fit
Heated:Yes
Length:22.83 in
Overall Length:23.95 in
Thread Size:M18 mm
Wire Harness Length:20.70 in
Wire Quantity:4

REVIEW SNAPSHOT®

by PowerReviews
DensoOxygen Sensor - Direct Fit
 
4.5

(based on 4 reviews)

Ratings Distribution

  • 5 Stars

     

    (2)

  • 4 Stars

     

    (2)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

100%

of respondents would recommend this to a friend.

Pros

  • Easy to use (4)

Cons

No Cons

Best Uses

  • Small cars (3)
    • Was this a gift?:
    • No (3)

Reviewed by 4 customers

Displaying reviews 1-4

Back to top

 
5.0

works great o2 ligth out!

By 

from vermont

About Me Fixer Upper, Mechanic

Verified Buyer

Pros

  • Easy To Use
  • Fit Great

Cons

  • None

Best Uses

    Comments about Denso Oxygen Sensor - Direct Fit:

    fit like factory

    Comment on this reviewHelp Icon

     
    4.0

    Oxygen Sensor

    By 

    from Somerset, NJ

    About Me Casual Driver

    Verified Buyer

    Pros

    • Easy To Use

    Cons

      Best Uses

      • Small Cars

      Comments about Denso Oxygen Sensor - Direct Fit:

      Just needed a replacement

      • Was this a gift?:
      • No

      Comment on this reviewHelp Icon

       
      5.0

      "I would buy this product again"

      By 

      from HIGH POINT, NC

      About Me Mechanic

      Verified Buyer

      Pros

      • Easy To Use

      Cons

        Best Uses

        • Small Cars

        Comments about Denso Oxygen Sensor - Direct Fit:

        ALL GOOD .

        • Was this a gift?:
        • No

        Comment on this reviewHelp Icon

         
        4.0

        I would buy this pruduct again and again

        By 

        from boston MA

        About Me Competitive Driver

        See all my reviews

        3 or more reviews submitted

        Pros

        • Easy To Use
        • High-Performance

        Cons

          Best Uses

          • Large Cars
          • Small Cars

          Comments about Denso Oxygen Sensor - Direct Fit:

          used this on my Eclipse 2000, had code bank1 sensor1, worked fine and easy to installed.

          • Was this a gift?:
          • No

          Comment on this reviewHelp Icon

          Displaying reviews 1-4

          Back to top

          Do you have questions about this product?

           

          Ask a question, get answers from real customers and in-house experts. For further assistance, please review your support options on our Contact Us page.

          5 Questions | 6 Answers
          Displaying questions 1-5
          • Q:

            is denso o2 sensor 234-4738 for front?
            Asked on 10/19/2013 by sal from oakland

            1 answer

            • CUSTOMER CARE

              A:

              Hi Sal. Yes, this Denso Oxygen Sensor - Direct Fit - Part No. 234-4738 is for front upstream sensor. For compatibility with your vehicle, please provide the year, make, model and engine size of your vehicle.

              Answered on 10/19/2013 by Morgan from AAP
          • Q:

            My car is mitsubishi diamante 2003. This part is for bank 1 sensor 1 or bank 2 sensor 1. Thanks!
            Asked on 8/30/2013 by yzwang from 113 castle oak pl, Knoxville, TN, 37909

            1 answer

            • CUSTOMER CARE

              A:

              This Denso Oxygen Sensor - Direct Fit - Part No. 234-4738 is for bank 1 and sensor 1 with your 2003 Mitsubishi Diamante. For any further assistance, please feel free to call us at: 1-877-238-2623 or visit the nearest Advance Auto Parts store and one of our Parts Pros will gladly assist you with any questions or concerns you may have.

              Answered on 8/30/2013 by Morgan from AAP
          • Q:

            I have a 2003 mitsubishi diamante. My trouble code is coming up p0155, which is bank 2 sensor 1. I was told that i need to use a left bank upstream sensor. Is this true?
            Asked on 4/3/2013 by mike from buffalo

            1 answer

            • CUSTOMER CARE

              A:

              This Denso Oxygen Sensor Direct Fit, Part No. 234-4738 is an exact fit for your 2003 Mitsubishi Diamante. This is an upstream sensor. Code P0155: refers to the front oxygen sensor on Bank 2 of the vehicle. The heated circuit in the oxygen sensor decreases time needed to enter closed loop. As the oxygen sensor heater reaches operating temperature, the oxygen sensor responds by switching according to oxygen content of the exhaust surrounding it. The ECM (Engine Control Module) tracks how long it takes for the oxygen sensor to begin switching. If the ECM determines (based on coolant temperature) that too much time elapsed before the oxygen sensor began operating properly, P0155 is set., SYMPTOMS: Most likely to notice poor fuel economy the illumination of the MIL., CAUSES: oxygen sensor heater element resistance is high, Internal short or open in the heater element, oxygen sensor heater circuit wiring high resistance, open or short to ground in the wiring harness., POSSIBLE DIAGNOSTIC: Repair short or open or high resistance in wiring harness or harness connectors., Replace oxygen sensor.
              For any further assistance please feel free to call us at: 1-877-238-2623 or visit the nearest Advance Auto Parts store and one of our Parts Pros will gladly assist you with any questions or concerns you may have.

              Answered on 4/4/2013 by Aaron from AAP
          • Q:

            I have a 2000 Mitsibishi Galant 4 cyl (I-4 2.4L). I have a P0420 OBDII code. I was wanting to replace any sensors that would affect the cat specific to this code. Is this the only sensor I would need to replace to ensure that if I still get a code that I would in fact need to replace the cat. converter.? So basically is this the only sensor that monitors the cat itself?
            Asked on 2/6/2012 by KevM

            1 answer

            • CUSTOMER CARE

              A:

              Yes, this part fits your 2000 Mitsubishi Galant 4 cycle (I-4 2.4L). The mounting location of this part should be Passenger Side, Before Catalytic Converter. CODE P0420: The catalytic converter has an oxygen sensor in front and behind it. When the vehicle is warm and running in closed loop mode, the upstream oxygen sensor waveform reading should fluctuate. The downstream O2 sensor reading should be fairly steady. Typically the P0420 code triggers the Check Engine Light if the readings of the two sensors are similar. This is indicative of (among other things) a converter that is not working as efficiently as it should be. It is part of the vehicle emissions system. SYMPTOMS: You will not notice any drivability problems, although there may be symptoms. CAUSES: code P0420 may mean that one or more of the following has happened: 1). Leaded fuel was used where unleaded was called for, 2). An oxygen sensor is not reading (functioning) properly, 3). The engine coolant temperature sensor is not working properly, 4). Damaged or leaking exhaust manifold / catalytic converter / exhaust pipe, 5). Retarded spark timing, 6). The oxygen sensors in front and behind the converter are reporting too similar of readings. POSSIBLE DIAGNOSIS: Some suggested steps for troubleshooting a P0420 error code: Check for exhaust leaks at the manifold, pipes, catalytic converter. Repair as required. Use a scope to diagnose the oxygen sensor operation (Tip: The oxygen sensor in front of the catalytic converter normally has a fluctuating waveform. The waveform of the sensor behind the converter should be more steady). Inspect the downstream heated oxygen sensor, replace if necessary, Replace the catalytic converter

              Answered on 2/7/2012 by Aaron from AAP
          • Q:

            Is the right side the number 1 bank or number 2 bank
            Asked on 11/7/2011 by Anonymous

            2 answers

            • CUSTOMER CARE

              A:

              To help you in a better manner, Please be more specific on your query.
              For compatibility, Please provide your vehicle make, model and engine specification.

              Answered on 11/7/2011 by Aaron from AAP
            • A:

              bank 1 has number one cylinder on its side.

              Answered on 2/8/2012 by charliebear from pittsboro nc
          Displaying questions 1-5

          Do you have a question about this product? 

          Check out the specials in our monthly flyer.
           
           
          Disclaimer We strive to keep all information accurate and up-to-date; however, product availability, pricing, promotions and store hours are subject to change without notice. Please contact Customer Care if you have any questions or corrections.