Oxygen Sensor
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Oxygen Sensor Oxygen Sensor
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NTK Oxygen Sensor

Part No. 21002 Warranty  

See if this part fits a specific vehicle.

Check Vehicle Fit

NTK Oxygen Sensors meet OE specifications for form, fit and function and have a direct-fit, OEM-style connector for installation.
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Connector Type:OE Type
Exact Fit:No
Heated:No
Length (Sealing Surface To End Of Connector):15.25 in
O.E.M. Number:6003981
Thread Size:18 mm
Wire Quantity:1

REVIEW SNAPSHOT®

by PowerReviews
NTKOxygen Sensor
 
3.2

(based on 5 reviews)

Ratings Distribution

  • 5 Stars

     

    (2)

  • 4 Stars

     

    (1)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (2)

75%

of respondents would recommend this to a friend.

Pros

  • Easy to use (3)

Cons

    Best Uses

        • Reviewer Profile:
        • Casual driver (3)
        • Was this a gift?:
        • No (5)

      Reviewed by 5 customers

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      Displaying reviews 1-5

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      1.0

      Not a 3 wire sensor

      By youngbuck007

      from Shady Side, MD

      About Me Auto Enthusiast

      Verified Buyer
      Level 1

      Pros

        Cons

        • Incompatible

        Best Uses

          Comments about NTK Oxygen Sensor:

          I bought this to replace the 3 wire sensor I have on a classic vehicle converted over to TBI. The original sensor installed was a 3 wire with same plug shown in these pics, so I thought I was good. When I opened the package I found out it is a 1 wire sensor which is completely different and would not work. Had to return.

          • Was this a gift?:
          • No

          Comment on this review(earn points)

          (4 of 8 customers found this review helpful)

           
          1.0

          Had to replace it after 8 months.

          By Geno

          from Huntsville, AL

          About Me Casual Driver

          Pros

            Cons

              Best Uses

              • Small Cars

              Comments about NTK Oxygen Sensor:

              Installed sensor and to replace it after 8 months and 5,000 miles. Hope the replacement works much better.

              • Was this a gift?:
              • No

              Comment on this review(earn points)

              (4 of 8 customers found this review helpful)

               
              5.0

              Original fit, Threads have anti-sieze

              By Sarge

              from Laredo, Tx

              About Me Casual Driver, Know enuf to be dangerous

              Pros

              • Easy To Use

              Cons

                Best Uses

                • Trucks

                Comments about NTK Oxygen Sensor:

                This was a direct fit for my 88 S10 Blazer 2.8 ltr . NUT SIZE was 7/8th inch. It comes with anti-sieze on the threads. Fist time I had changed one out and was amazed how easy it was.

                • Was this a gift?:
                • No

                Comment on this review(earn points)

                (5 of 9 customers found this review helpful)

                 
                4.0

                worked fine

                By dogsitr

                from hemet ca

                About Me Casual Driver

                Verified Buyer
                3 or more reviews submitted

                Pros

                • Easy To Use

                Cons

                  Best Uses

                  • Large Cars

                  Comments about NTK Oxygen Sensor:

                  worked fine

                  • Was this a gift?:
                  • No

                  Comment on this review(earn points)

                  (6 of 9 customers found this review helpful)

                   
                  5.0

                  My Purchase(s)

                  By woody

                  from Huntingburg, Indiana

                  Verified Buyer
                  3 or more reviews submitted

                  Pros

                  • Durable
                  • Easy To Use
                  • Lightweight

                  Cons

                    Best Uses

                    • Small Cars

                    Comments about NTK Oxygen Sensor:

                    Worked out as planned

                    • Car & Truck:
                    • Casual Driver
                    • Was this a gift?:
                    • No

                    Comment on this review(earn points)

                    Displaying reviews 1-5

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                    Do you have questions about this product?(earn points for answers!)

                     

                    Ask a question, get answers from real customers and in-house experts. Or contact Customer Care by email or call 1-877-238-2623.

                    4 Questions | 5 Answers
                    Displaying questions 1-4
                    • Q:

                      what size are the threads on an oxygen sensor for a 1990 gmc 2wd stepside?
                      Asked on 6/15/2013 by purbomb

                      1 answer

                      • CUSTOMER CARE

                        A:

                        With reference to your inquiry on the NTK Oxygen Sensor - part# 21002, the threads on an oxygen sensor for a GMC Sierra Stepside would be M18x1.5. 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 6/17/2013 by Vincent from AAP
                    • Q:

                      Does this have the wire and the connector with it?
                      Asked on 7/13/2012 by Manny from Amarillo TX

                      1 answer

                      • CUSTOMER CARE

                        A:

                        Yes, this NTK Oxygen Sensor – part# 21002 includes the wiring harness and connector with it. For any further assistance, please visit your nearest Advance Auto store or call us directly at 1-877-ADVANCE (238-2623) and one of our representative there would be more than happy to assist you.

                        Answered on 7/14/2012 by Vincent from AAP
                    • Q:

                      where is connection wire
                      Asked on 10/1/2011 by Anonymous

                      1 answer

                      • CUSTOMER CARE

                        A:

                        In order to help you in a better manner, please be more specific on your query.

                        Answered on 10/2/2011 by Steve from AAP
                    • Q:

                      location of sensor on car
                      Asked on 6/21/2011 by Anonymous

                      2 answers

                      • CUSTOMER CARE

                        A:

                        The oxygen sensor is located in the Catalytic converter. Most late model cars have two sensors. There will be one at the front of the catalytic converter, and one at the rear.

                        Answered on 6/22/2011 by DIY Daniel from AAP
                      • A:

                        EXHAUST PIPE YUST BEHIND THE CONVERTER

                        Answered on 8/7/2011 by ME from OHIO
                    Displaying questions 1-4

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