Autolite® - Iridium XP™ Spark Plug

6 reviews|Item # sp189216|Similar Products
$5.14 - $5.87
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Iridium XP™ Spark Plug by Autolite®. Want to upgrade the ignition system of your vehicle to get ultimate combustion and maximum horsepower? Step up to Autolite. Featuring the ground-breaking design, this product guarantees to deliver quick starts and provide peak performance. It was fabricated from novel materials with the help of up-to-date equipment to offer you the latest in quality and value.


  • Wise investment to get an efficient ignition system upgrade
  • Will provide improved ignitability and engine performance
  • Modern design enables more focused ignition power
  • Total quality assurance, lasting and dependable service for years

If you're into performance, then you need an innovatively designed ignition part and that’s what Autolite has for you. This cutting-edge product was engineered with leading innovations to provide better performance, greater durability, quicker acceleration, and higher fuel efficiency versus originals. Manufactured from dependable materials with advanced equipment, it will enable powerful and reliable engine starting every single day. In addition, Autolite promises this part will deliver years of uninterrupted use and flawless operation. Backed by the expertise, it is going to meet and even surpass your highest expectations.

An innovation leader since 1936, Autolite® creates the highest quality ignition products for a wide variety of engines. Established in 1911, the company started manufacturing buggy lamps and became a thriving automotive parts manufacturer by the 1930's. Still, the first Autolite spark plug saw the world in 1936 and had instant success on the market. Today, the company is known as the manufacturer of America's best-selling spark plug and offers a number of spark plug series such as Autolite XP Xtreme Performance, Autolite Platinum, Autolite Revolution HT, Autolite Double Platinum, etc.


Autolite® - High Thread Spark Plug Removal And InstallationAutolite® - High Thread Spark Plug Removal And Installation


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Autolite® - Iridium XP™ Spark Plug
1-6 of 6 Reviews
5 of 5
Plugs Definitely Improved The Performance
Starting got better now. Thought I haven't checked the new RPM yet, in a whole drivings changed to better since I replaced the spark plugs. I am glad that I bought these plugs.
Posted by Thomas (Mesa, AZ) / September 07, 20162014 Chevy Malibu
5 of 5
Great Replacement For Less
I replaced the original equipment NGK iridium plugs in my 2002 Acura RSX with Autolite iridium ones and noticed no drop off in performance. After 46,000 miles with these plugs, the car runs great and my gas mileage is as good as ever. The Autolite plugs cost less than the NGK plugs.
Posted by Dennis (Mesa, AZ) / April 15, 20142002 Acura RSX
5 of 5
3 Years Without Problems
These spark plugs are 3 years old with over 30K and my vehicle starts as fast as the day I put them in. It takes more then 2 hours to replace the plugs on my Mercury Cougar, so I want to do it only when necessary.
Posted by Charles (Indian Trail, NC) / April 14, 20141984 Mercury Cougar
5 of 5
Install The Best To Not Do Same Job Again Soon
I had them installed in my Chrysler Sebring and did not notice increased horse power, smoother idling, faster starts-up, or better gas mileage. The truth is that I didn't purchase spark plugs for performance enhancement so didn't expect all those features. I did buy these (and I am very satisfied) because iridium is stronger and has a higher melt point them platinum. I intend to get 100k miles out of these plugs.
Posted by Southern Motors Honda (Fresno, CA) / April 04, 20142002 Oldsmobile Alero
5 of 5
Good And Reliable
I run Iridium XP104 in my '02 Ranger and also their XP5224 version in our 3.7L V6 Jeep KJ Liberty with very good results. Neither one is a real joy to change plugs in, especially the vette - brutal - so you want to know the plugs you put in will work and LAST a long, long time. Like the other reviewer said, no miracles but they're top quality and reliable. For $6 for the best versus $2 for possible junk, you're crazy to put cheap plugs in any vehicle.
Posted by Douglas (Oklahoma City, OK) / April 02, 20142008 Ford Ranger
4 of 5
Good Replacement for OE NGK or Denso Spark Plugs
Got some Autolite XP 3923s for my Toyota Sienna 2001. And they seem to work fine. Fast start, smooth idle, and the engine runs just like using OEM NGK or Denso plugs. But these are considerably cheaper and come with a 5-year warranty. I was afraid the end of the plug was going to have a strange head that would cause my Sienna ignition wire boots to slip off the end every couple of days. But the head was similar in a shape to the dealer installed Denso long life iridium SK20R11's. Moreover, ignition wire boot slipping off won't happen on new Toyota vehicles, which have separate ignition coil/boot pairs for each pair of plugs (3 sets for a V6 ) and these are each screwed down with a 10mm x 40mm long bolt to the engine block. So no slipping fears at least for me. Also, I can report no noticeable decrease in mileage. It was really simple to replace 3 front plugs, while changing out the back 3 is difficult due to restricted access, which is why I hope these will last a LONG time. We'll see how the 5-year warranty holds up.
Posted by Nico (Stoney Creek, ON) / March 11, 20142001 Toyota Sienna
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