








⚡ Ignite Performance, Drive Efficiency — Don’t Get Left Behind!
The Autolite Iridium XP XP3924 spark plug combines cutting-edge 0.6mm iridium finewire technology with platinum ground wire protection to deliver up to 100,000 miles of reliable, fuel-efficient ignition. Trusted since 1936, this universal-fit spark plug ensures optimal engine performance and durability backed by a limited lifetime warranty.





| Brand | Autolite Iridium Ultra |
| Core Material | Iridium |
| Thread Size | 12 mm |
| Top Material Type | Nickel |
| Vehicle Service Type | Car, Truck |
| Global Trade Identification Number | 00009100044365 |
| Automotive Fit Type | Universal Fit |
| UPC | 009100044365 |
| OEM Part Number | XP3924 |
| Manufacturer | FRAM |
| Model | XP3924 |
| Item Weight | 1.76 ounces |
| Product Dimensions | 1 x 1 x 3.38 inches |
| Item model number | XP3924 |
| Is Discontinued By Manufacturer | No |
| Exterior | Chrome |
| Manufacturer Part Number | XP3924 |
| Position | Center |
| Special Features | Finewire design, Limited Lifetime Warranty |
K**E
Great product
Excellent for. Performance of vehicle improved. Gap was preset and installed easily.
W**S
Perfect OEM Replacement
No need for gapping these. They're already gapped form the factory. They fit right in my 2002 Chevrolet Prizm. Installation was a breeze and they seemed to be of good quality and function exactly how they're supposed to.
D**N
Autolite Iridium XP in a John Deere LA120 riding lawnmower
I replaced the 2 champion spark plugs in our John Deere LA120 riding lawnmower with 2 Autolite Iridium XP3924 spark plugs and it has never started quicker. It has over 200 hours on it and even when new it did not start so quickly. I have mowed our lawn twice (over 4.5 acres) since installing these Autolite Iridium spark plugs and I have not had to refill the gas tank. In the past I could get 1 and 3/4 mowings on a full tank of gas. Being Iridium spark plugs, these will not need to be replaced anywhere near as often as copper or platinum spark plugs. These Autolite Iridium spark plugs would be well worth the price just for the longer replacement intervals but factoring the quicker, smoother starts and lowered fuel consumption make these an even greater value!
J**.
Good plugs
Good plugs
N**.
Good price
Good price, but I ordered 6 I got 3 first one in each package,next day I got that other 3,two in one package and 1 in another package, four of the spark plugs were outstanding of the origal package,if I knew that were sent like that I would not order it, I have tried them yet,bad shipping they supposedly came from the same place,but they arrived two different days and in 5 package it
A**N
Can't go wrong
Good plugs for the price. I've heard these are "iridium enhanced" plugs and not pure iridium. Plus the platinum puck (or whatever you want to call it) on the ground electrode is either just a coating or barely there. In a nutshell, these leave a lot to be desired when you compare to OEM.But the truth is, these do fine for most vehicles as aftermarket replacements. Why? The OEM plugs ('07 Kia Sportage 2.7L) lasted 180K (most people don't change them). Drop these in at 180K and guess what-- they'll go to the graveyard with the car. I have utmost confidence these plugs will last 50-100K+ quite easily.
A**
Good
Good for my Mazda 2012
K**N
Great plugs but check the gap before install
2012 audi a6 3.0t. Works great
Trustpilot
3 weeks ago
1 week ago