--- product_id: 29121327 title: "Autolite Iridium XP Automotive Replacement Spark Plugs, XP3923 (4 Pack)" brand: "autolite iridium ultra" price: "€ 50.09" currency: EUR in_stock: true reviews_count: 13 category: "Autolite Iridium Ultra" url: https://www.desertcart.hr/products/29121327-autolite-iridium-xp-automotive-replacement-spark-plugs-xp3923-4-pack store_origin: HR region: Croatia --- # Up to 100,000 miles extended change interval Laser welded tech for focused, consistent ignition 0.6mm finewire iridium tip for max fuel efficiency Autolite Iridium XP Automotive Replacement Spark Plugs, XP3923 (4 Pack) **Brand:** autolite iridium ultra **Price:** € 50.09 **Availability:** ✅ In Stock ## Summary > ⚡ Ignite Performance, Drive with Confidence! ## Quick Answers - **What is this?** Autolite Iridium XP Automotive Replacement Spark Plugs, XP3923 (4 Pack) by autolite iridium ultra - **How much does it cost?** € 50.09 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/29121327-autolite-iridium-xp-automotive-replacement-spark-plugs-xp3923-4-pack) ## Best For - autolite iridium ultra enthusiasts ## Why This Product - Trusted autolite iridium ultra brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Trusted Legacy:** Backed by Autolite’s 80+ years of expertise, ensuring reliable OE-quality performance every mile. - • **Fuel-Smart Design:** Laser welded iridium tip optimizes combustion, helping you save on fuel without sacrificing power. - • **Precision Ignition:** 0.6mm finewire iridium centerwire delivers razor-sharp sparks for smoother starts and peak engine responsiveness. - • **Unmatched Longevity:** Engineered to last up to 100,000 miles, minimizing maintenance downtime and maximizing your drive time. - • **Advanced Construction:** Platinum-protected ground wire and V-trimmed electrode enhance ignitability across all ignition systems, including DIS. ## Overview Autolite Iridium XP spark plugs (XP3923) combine cutting-edge iridium finewire technology and laser welding to deliver up to 100,000 miles of reliable, fuel-efficient ignition. Designed for all vehicle makes and models, these plugs offer superior durability, smoother engine starts, and optimized fuel consumption, backed by a limited lifetime warranty and over 80 years of Autolite’s trusted innovation. ## Description Autolite Iridium XP is designed and engineered in the USA, is one of the brand's most technologically advanced spark plugs ever. These spark plugs provide better durability and a more focused ignition for better overall ignitability and optimum performance. Autolite Iridium XP spark plugs function for all makes and models, both foreign and domestic, provides the automotive aftermarket and original equipment manufacturers with the highest quality ignition products. Consider upgrading to Autolite iridium XP spark plugs for increased performance. Autolite Iridium XP spark plugs are backed by an unmatched limited lifetime warranty. Review: Reliable spark plugs that perform well and last - I installed these utolite Iridium XP spark plugs (XP3923) in my car and they’ve been working great so far. They fir snugly and were easy to install, and once in place they’ve given smooth starts and consistent performance every time I drive. The iridium tips seem to hold up well — no signs of wear or rough starts even after weeks of use. My engine feels responsive, and I haven’t noticed any misfires or hesitation. Fuel economy and idle feel normal too, which is exactly what I want from replacement plugs. Overall, these spark plugs feel like good quality for the price. If you’re looking for reliable automotive plugs that offer long life and consistent performance, these are worth considering. Review: Working flawlessly in the Subaru I installed them in one year later. - These plugs are working flawlessly in the Subaru I installed them in one year later. No issues of any kind. Great product. I would recommend them to anyone looking to do a spark plug swap. ## Features - EXTENDED CHANGE INTERVAL: The Autolite Iridium XP automotive replacement spark plug is engineered to last for up to 100,000 miles depending on engine type making it one of the most durable spark plugs on the market today - FUEL EFFICIENCY: These spark plugs utilize a 0.6mm finewire iridium centerwire tip design with laser welded technology for maximum fuel efficiency. Our finewire electrodes produce more focused and consistent ignitability resulting in less fuel consumption - OPTIMAL PERFORMANCE: This replacement iridium spark plug provides better durability and a more focused ignition for better overall ignitabilty and optimal performance - AUTOLITE ADVANTAGE: Autolite has been producing spark plugs since 1936 making it one of the most trusted and reliable brands for your OE replacement spark plug needs - CONSTRUCTION: Every iridium spark plug comes with a platinum protected ground wire for maximum efficiency in all ignition types including DIS systems and a V-trimmed ground electrode for improved ignitability ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B009J58FJA | | Automotive Fit Type | Vehicle Specific Fit | | Best Sellers Rank | #82,398 in Automotive ( See Top 100 in Automotive ) #517 in Automotive Replacement Spark Plugs | | Brand | Autolite Iridium Ultra | | Core Material | Iridium | | Customer Reviews | 4.6 4.6 out of 5 stars (2,443) | | Date First Available | July 1, 2012 | | Exterior | Chrome | | Global Trade Identification Number | 00009100044334 | | Is Discontinued By Manufacturer | No | | Item Weight | 6.7 ounces | | Item model number | XP3923-4PK | | Manufacturer | FRAM | | Manufacturer Part Number | XP3923-4PK | | Model | XP3923-4PK | | Position | Center | | Product Dimensions | 3.38 x 4 x 1 inches | | Special Features | Finewire design, Limited Lifetime Warranty | | Thread Size | 5/8" | | Top Material Type | Alloy Steel | | UPC | 009100044334 | | Vehicle Service Type | Car, Truck | ## Product Details - **Brand:** Autolite Iridium Ultra - **Core Material:** Iridium - **Thread Size:** 5/8" - **Top Material Type:** Alloy Steel - **Vehicle Service Type:** Car, Truck ## Images ![Autolite Iridium XP Automotive Replacement Spark Plugs, XP3923 (4 Pack) - Image 1](https://m.media-amazon.com/images/I/71zUj4JgPFL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: where does one find a 3/8 inch spark plug socket socket? I can only find 5/8 inch and larger.** A: Unless these are somehow the tiniest spark plugs in existence, you do not need a 3/8” socket. 5/8” will be the correct socket size and 3/8” will be the size of the ratchet attachment on the other end of the socket. 3/8” is about 10 mm which is smaller than the threads on this plug. **Q: will this fit 2004 dodge ram 1500 4.7 liter 4x4 v8?** A: No, these Autolite XP3923 spark plugs fit 2002-2005 Dodge Ram 1500 (3.7L). Autolite XP5224 will fit 2002-2007 Dodge Ram 1500 (4.7L V8). **Q: Will these spark plugs fit 2003 Altima 2.5** A: Hello, no these will not fit a Altima. Ngk are the original part number 6240. Please let us know if we can be of further assistance. **Q: Where are these made?** A: Autolite Iridium XP spark plugs are designed and engineered in the USA. However, they are manufactured in China - as are all Autolite spark plugs. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Reliable spark plugs that perform well and last *by D***R on January 28, 2026* I installed these utolite Iridium XP spark plugs (XP3923) in my car and they’ve been working great so far. They fir snugly and were easy to install, and once in place they’ve given smooth starts and consistent performance every time I drive. The iridium tips seem to hold up well — no signs of wear or rough starts even after weeks of use. My engine feels responsive, and I haven’t noticed any misfires or hesitation. Fuel economy and idle feel normal too, which is exactly what I want from replacement plugs. Overall, these spark plugs feel like good quality for the price. If you’re looking for reliable automotive plugs that offer long life and consistent performance, these are worth considering. ### ⭐⭐⭐⭐⭐ Working flawlessly in the Subaru I installed them in one year later. *by C***E on January 3, 2025* These plugs are working flawlessly in the Subaru I installed them in one year later. No issues of any kind. Great product. I would recommend them to anyone looking to do a spark plug swap. ### ⭐⭐⭐⭐⭐ Review *by J***Z on February 12, 2026* Nada mejor por ese precio ## Frequently Bought Together - Autolite Iridium XP Automotive Replacement Spark Plugs, XP3923 (4 Pack) - 4PCS Ignition Coils for 2002 2003 2004 2005 2006 2007 2008 2009 2.4L Toyota Camry Matrix RAV4 Solara Highlander Scion TC xB Lexus HS250h 2.4 Coil Packs OE# UF333 C1330 90919-02244 - FEL-PRO VS 50530 R Engine Valve Cover Gasket Set for Toyota Camry --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/29121327-autolite-iridium-xp-automotive-replacement-spark-plugs-xp3923-4-pack](https://www.desertcart.hr/products/29121327-autolite-iridium-xp-automotive-replacement-spark-plugs-xp3923-4-pack) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-05-14*