Iridium XP Spark Plug
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Iridium XP Spark Plug
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Autolite Iridium XP Spark Plug

Part No. XP3923 Warranty Details  

See if this part fits a specific vehicle.

Check Vehicle Fit

The Iridium XP is Autolite’s most technologically advanced plug ever. These spark plugs provide better durability* and a more focused ignition for better overall ignitability** and optimum performance.

Product Features:
  • Iridium enhanced 0.6mm finewire design for optimal durability and performance
  • Platinum ground wire for maximum efficiency in all ignition types including DIS systems
  • V-trimmed ground electrode for improved ignitability
  • Heat range precisely set by Ionization Sensing Technology
  • Lifetime Limited Warranty
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Electrode Tip Material:Xtreme Performance
Reach:3/4 in
Resistor:Suppressor
Seat Type:Gasket
Thread Diameter:14 mm
Tip Configuration:Power
Wrench Diameter:5/8 in

REVIEW SNAPSHOT®

by PowerReviews
AutoliteIridium XP Spark Plug
 
3.4

(based on 5 reviews)

Ratings Distribution

  • 5 Stars

     

    (2)

  • 4 Stars

     

    (1)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (1)

  • 1 Stars

     

    (1)

60%

of respondents would recommend this to a friend.

Pros

  • Easy to install (3)

Cons

No Cons

Best Uses

No Best Uses

Reviewed by 5 customers

Displaying reviews 1-5

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(1 of 1 customers found this review helpful)

 
5.0

Gap your plugs!

By 

from Lincoln, NE

About Me Mechanic

See all my reviews

Ask me a question

3 or more reviews submitted

Pros

  • Easy To Install
  • Improves Engine Efficiency
  • Increases Power

Cons

    Best Uses

    • Everyday Driving
    • Performance Driving
    • Replacement

    Comments about Autolite Iridium XP Spark Plug:

    ATTENTION! I can almost guarantee that everyone who is complaining about these plugs didn't gap their plugs. The guy at the counter is dead wrong when he says "these are pre-gapped", they are not and it's impossible to gap them for every car they fit in!
    Mine were all gapped over .045 which is off my wire gauge since my car needs .029 and so was using my small one. I expect to gap my plugs for my car and you should too. So if you're gap is this high than maybe you lucky, but if not then your car is going to run like garbage if you do not gap them.

    That being said, these are well designed plugs i have ran them before in several other cars, and my Cruze runs great with them also.

    (2 of 2 customers found this review helpful)

     
    4.0

    works on a 2004 camry

    By 

    from lexington, ky

    Pros

    • Works On A 2004 Camry

    Cons

      Best Uses

        Comments about Autolite Iridium XP Spark Plug:

        works on a 2004 camry no need to adjust gap

        (2 of 2 customers found this review helpful)

         
        2.0

        Not Pleased

        By 

        from Roanoke, VA

        About Me Truck Enthusiast

        Pros

          Cons

          • No Improvement In Performance

          Best Uses

            Comments about Autolite Iridium XP Spark Plug:

            I just installed the Autolite Xtreme Iridium plugs and the 19 yr old nissan 3.0 v6 motor developed a rough idle and drop in performance. So yesterday I reinstalled the old plugs and the engine runs quite abit smoother. Oh well..

            (3 of 6 customers found this review helpful)

             
            5.0

            love the XP plugs

            By 

            from inland empire ca

            Helpful Reviewer

            Pros

            • Car is more peppy
            • Durable
            • Easy To Install
            • Improves Engine Efficiency
            • Increases Power
            • Starts first try

            Cons

              Best Uses

              • Everyday Driving
              • Performance Driving

              Comments about Autolite Iridium XP Spark Plug:

              love how easy my 2000 ford ranger starts with these plugs.. also a lot more peppy. one thing is make sure you gap the plug for your truck or car. thumbs up to this product.

              • Car & Truck:
              • Auto Enthusiast, Casual Driver, Truck Enthusiast, Work truck

              (4 of 9 customers found this review helpful)

               
              1.0

              Rav4 unhappy with Autolite XP Iridium

              By 

              from Atlanta,GA

              Pros

              • Easy To Install

              Cons

              • No Improvement In Performance

              Best Uses

              • Replacement

              Comments about Autolite Iridium XP Spark Plug:

              '03 Rav4 spit and sputtered and refused to perform with this Autolite XP Iridium spark plug that is recommended for Toyotas by the website and the counter sales.A good looking part that gets last place with performance. Try Ford installations rather than foreign on this one.

              • Car & Truck:
              • Auto Enthusiast, Mechanic, Truck Enthusiast

              Displaying reviews 1-5

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              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.

              3 Questions | 3 Answers
              Displaying questions 1-3
              • Q:

                How many are include in the price for $6.99?
                Asked on 12/1/2012 by Paul

                1 answer

                • CUSTOMER CARE

                  A:

                  This Autolite Xp (Xtreme Performance) Iridium Enhanced Fine Wire Spark Plug
                  -(Part No. XP3923) is sold individually. 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 representatives there would be more than happy to assist you.

                  Answered on 12/1/2012 by Aaron from AAP
              • Q:

                has anyone tried them in a 2001 vw jetta 1.8 turbo (wolfsburg edition)
                Asked on 1/14/2012 by Anonymous from mississippi

                1 answer

                • CUSTOMER CARE

                  A:

                  Yes, this Autolite Xp (Xtreme Performance) Iridium Enhanced Fine Wire Spark Plug with part# XP3923 should work fine on your 2001 Volkswagen Jetta Wolfsburg Edition.

                  Answered on 1/15/2012 by Vincent from AAP
              • Q:

                Has anyone tried this in a VW GTI 2.0L Turbo?
                Asked on 12/28/2011 by Jerry from Yorktown, VA

                1 answer

                • CUSTOMER CARE

                  A:

                  To know the exact fit application, if you could please include the year of the vehicle and we would be better able to assist you. This Autolite racing spark plug features a copper core electrode with an anti-corrosive nickel plated tip and a cut-back ground strap for ultra high-compression engines with small combustion chambers.

                  Answered on 12/28/2011 by Dennis from AAP
              Displaying questions 1-3

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