Iridium Ix Spark Plug (LFR5AIX-11)
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Iridium Ix Spark Plug (LFR5AIX-11)
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NGK Iridium Ix Spark Plug (LFR5AIX-11)

Part No. 4469 Warranty Details  

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Laser-welded iridium center electrode is resistant to heat, corrosion and electrical wear. The tapered ground electrode minimizes quenching. Provides outstanding acceleration, high fuel efficiency and durability.

Product Features:
  • 0.6 mm iridium-tip center electrode provides durability and a high melting point
  • Taper-cut ground electrode shape provides improved flame reproduction
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Center Electrode Core Material:Copper Core
Center Electrode Tip Material:Iridium
Electrode Core Material:Iridium
Electrode Tip Material:Iridium
Gap Size:0.044 in
Ground Configuration:Standard
Ground Electrode Core Material:Nickel Core
Ground Electrode Quantity:1
Ground Electrode Tip Design:Taper Cut
Ground Strap Quantity:1
Hex Size:5/8 in
Manufacturer Heat Range:5
Reach:26.5 mm
Resistor:Yes
Seat Type:Gasket
Shorty Spark Plug:No
Spark Plug Approximate Resistor Value:5K Ohm
Thread Diameter:14 mm
Tip Configuration:Solid
Type:Iridium IX
Wrench Diameter:5/8 in

REVIEW SNAPSHOT®

by PowerReviews
NGKIridium Ix Spark Plug (LFR5AIX-11)
 
4.8

(based on 22 reviews)

Ratings Distribution

  • 5 Stars

     

    (17)

  • 4 Stars

     

    (5)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

100%

of respondents would recommend this to a friend.

Pros

  • Improves engine efficiency (14)
  • Easy to install (12)
  • Durable (10)
  • Increases power (10)

Cons

No Cons

Best Uses

  • Everyday driving (13)
  • Replacement (9)
  • Performance driving (5)
    • Reviewer Profile:
    • Casual driver (8), Auto enthusiast (6), Mechanic (5)

Reviewed by 22 customers

Displaying reviews 1-10

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5.0

Worth the extra couple of dollars.

By 

from Atlanta, GA

Verified Buyer

Comments about NGK Iridium Ix Spark Plug (LFR5AIX-11):

Spent the extra couple of dollars to get these, well worth it. Typically I would buy the mid priced ones but with the constant strain on driving so much, traffic and hauling on a regular basis I opted to buy these. Didn't want to take any chances in case I take a road trip. My truck is running great. Great contact and purring like a kitten. Also purchased compete set of brakes an rotors to round out needed maintenance and got a great deal coupled with the limited lifetime warranty, doesn't get any better.

  • Was this a gift?:
  • No
 
5.0

Definitely improved engine performance

By 

from Frederick, MD

See all my reviews

Verified Buyer
3 or more reviews submitted

Pros

  • Exact Fit
  • High Quality
  • Well Made

Cons

    Best Uses

      Comments about NGK Iridium Ix Spark Plug (LFR5AIX-11):

      2003 Nissan Altima 2.5L 177K miles on it - Engine would sometimes shudder and hesitate at cruising speed under slight acceleration but no codes on the ECM. I had NGK plugs in it, around 80K miles on them. I installed new NGK plugs and thoroughly cleaned the coils/wiring/coil-on-boot tubes. The engine now runs smoother, increased power, and the shudder/hesitation is gone. NGK plugs are high quality plus they have superior plating on the threads, are less likely to seize in aluminum cylinder heads (ALWAYS use anti-seize on the threads when installing new plugs!). Exactly what was needed to restore my engine performance.

      • Was this a gift?:
      • No
       
      5.0

      NGK ALL THE WAY! !

      By 

      from San Antonio, TX

      Verified Buyer

      Comments about NGK Iridium Ix Spark Plug (LFR5AIX-11):

      I run these NGK's in all my vehicles. They work awesome and have never had issues.

       
      5.0

      Good stuff

      By 

      from Rock hill sc

      See all my reviews

      Verified Buyer
      3 or more reviews submitted

      Comments about NGK Iridium Ix Spark Plug (LFR5AIX-11):

      Nice and easy to use good quality as well.

       
      5.0

      Best Spark Plug!

      By 

      from Stuarts Draft, VA

      Verified Buyer

      Pros

      • Overall best balance of performance/durabil

      Cons

        Best Uses

          Comments about NGK Iridium Ix Spark Plug (LFR5AIX-11):

          I love these spark plugs! I've used them as a replacement in all my cars! They come pre-gapped and have the best overal balance of durability, performance, and price. I had no issues with my installs and I have put them in several Hondas, an infiniti and a ford. I use to use the platinum 4 prong for a while and while I was pleased in the beginning I was not happy in the long run. I've noticed that the iridium shave the best capability for full combust the fuel needed and for that reason I have seen a big increase in miles to the gallon as well.

           
          5.0

          Good Spark Plugs for Nissan's

          By 

          from Georgia

          About Me Casual Driver

          See all my reviews

          Verified Buyer

          Pros

          • Durable
          • Easy To Install
          • Improves Engine Efficiency

          Cons

            Best Uses

            • Everyday Driving
            • Replacement

            Comments about NGK Iridium Ix Spark Plug (LFR5AIX-11):

            Good Plugs

             
            5.0

            product is great long lasting

            By 

            from lunenburg ma

            About Me Mechanic

            Verified Buyer

            Pros

            • Durable
            • Improves Engine Efficiency
            • Increases Power

            Cons

              Best Uses

              • Everyday Driving

              Comments about NGK Iridium Ix Spark Plug (LFR5AIX-11):

              product is original best performance

              (0 of 1 customers found this review helpful)

               
              4.0

              for maxima 2006

              By 

              from mcallen texas

              About Me Auto Enthusiast, Competitive Driver, Mechanic

              Verified Buyer

              Pros

              • Easy To Install
              • Improves Engine Efficiency
              • Increases Power

              Cons

              • Decreases Gas Mileage

              Best Uses

              • Performance Driving
              • Racing

              Comments about NGK Iridium Ix Spark Plug (LFR5AIX-11):

              quality excellent

               
              5.0

              Expensive, but worth it.

              By 

              from South Carolina

              About Me Auto Enthusiast

              Verified Buyer

              Pros

              • Improves Engine Efficiency
              • Increases Power

              Cons

                Best Uses

                • Everyday Driving
                • Performance Driving
                • Replacement

                Comments about NGK Iridium Ix Spark Plug (LFR5AIX-11):

                A definite upgrade over the old plugs.

                (3 of 3 customers found this review helpful)

                 
                5.0

                Great plugs....

                By 

                from USA

                About Me 40yrs Of Wrenching, Auto Enthusiast, Mechanic

                See all my reviews

                Verified Buyer
                3 or more reviews submitted

                Pros

                • Durable
                • Easy To Install
                • Improves Engine Efficiency
                • Increases Power

                Cons

                • none

                Best Uses

                • Everyday Driving
                • Replacement
                • Restoration

                Comments about NGK Iridium Ix Spark Plug (LFR5AIX-11):

                Tuned up my friends 04 Nissan Murano. It still had its original NGK plugs in it with over 155k miles on them. She said, "It just started missing" well duhh. NGK plugs are simply amazing to go so far. If they are not in stock I'll order them or go somewere else and get them. I havent bought another brand in many many yrs and I wont either.
                True: My Yamaha dirt bike was stolen as an 8yr old kid because a junk champion plug failed making me stash it in the woods for a couple hours. Bike was gone on my return only to be found the next day in a creek full of water. So we had a bike funeral at the scene!!
                Hot wired and it never started for the thief either I dont think? So not installing the original NGK plugs can really cost you in the wallet...lol
                For me they are the only plug to buy.

                Displaying reviews 1-10

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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.

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

                  What the spark plug gap on the 2010 Toyota canary LE with 4 cylinder motor?
                  Asked on 10/20/2015 by Steve from Stuart fl

                  1 answer

                  • CUSTOMER CARE

                    A:

                    Hi Steve, I'm glad to assist you. The spark plug gap on the 2010 Toyota Camry LE with 4 cylinder is 0.044 inches. This NGK Iridium Ix Spark Plug (LFR5AIX-11) (Part No. 4469) comes pre-gapped.

                    Answered on 10/21/2015 by Solomon
                • Q:

                  Are these the same long life plugs compared to the ddenso long life i wann try them
                  Asked on 2/1/2015 by omar from riverside

                  1 answer

                  • CUSTOMER CARE

                    A:

                    Hi Omar, I'm glad to answer you! The part number you listed is the Iridium IX line (40k - 50k miles). This is not a long life OEM type plug, rather the NGK's Laser Iridium and Laser Platinum plugs (80k - 100k) are the long life plugs and are OEM in many applications. Please provide us with the details of your application (including the year, make and model) and I will be happy to provide you with the correct product that can be used if available.

                    Answered on 2/2/2015 by Solomon
                • Q:

                  Does this plug work for a 2008 Altima 2.5 S ? Just went to get a tune-up and the mechanic ordered plugs for my car but said they were the wrong size and now they say noone in the area has them. I looked under the make/model etc. and it shows these are in stock but if the thread area is too large like the ones they ordered it's a bit crazy that they aren't right.
                  Asked on 3/30/2012 by Shawn from Whiteville, NC

                  1 answer

                  • CUSTOMER CARE

                    A:

                    No, this part NGK Iridium Ix Spark Plug, Part No. 4469 manufactured by NGK does not fit your 2008 Nissan Altima S 2.5L.

                    Answered on 4/1/2012 by Aaron from AAP
                • Q:

                  how do I change the plugs is the a diy diagram
                  Asked on 3/4/2012 by Anonymous

                  1 answer

                  • CUSTOMER CARE

                    A:

                    To help you in a better manner, if you could please include the year, make, model and engine specification of the vehicle and we would be better able to assist you.

                    Answered on 3/6/2012 by Aaron from AAP
                • Q:

                  yea can iridium spark plug be gaped?
                  Asked on 3/22/2011 by Rene from miami

                  1 answer

                  • CUSTOMER CARE

                    A:

                    No.

                    Answered on 4/28/2011 by David the Dynamite Parts Guy from AAP
                Displaying questions 1-5

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