--- product_id: 7467342 title: "Denso (3421) SK20HR11 Iridium Long Life Spark Plug, Single Plug" brand: "denso" price: "€ 29.56" currency: EUR in_stock: true reviews_count: 12 category: "Denso" url: https://www.desertcart.gr/products/7467342-denso-3421-sk20hr11-iridium-long-life-spark-plug-single-plug store_origin: GR region: Greece --- # Lasts 3x longer than conventional plugs 0.7mm fine-wire iridium tip Endures 4000°F+ extreme temps Denso (3421) SK20HR11 Iridium Long Life Spark Plug, Single Plug **Brand:** denso **Price:** € 29.56 **Availability:** ✅ In Stock ## Summary > ⚡ Ignite your drive with precision and longevity! ## Quick Answers - **What is this?** Denso (3421) SK20HR11 Iridium Long Life Spark Plug, Single Plug by denso - **How much does it cost?** € 29.56 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/7467342-denso-3421-sk20hr11-iridium-long-life-spark-plug-single-plug) ## Best For - denso enthusiasts ## Why This Product - Trusted denso brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Unrivaled Durability:** Engineered to last over 100,000 miles with sustained performance - • **Optimized Fuel Economy:** Enhances combustion for better mileage and fewer misfires under load - • **Extreme Heat Resistance:** Withstands temperatures exceeding 4000°F for high-performance engines - • **Precision Ignition Power:** Laser-welded 0.7mm iridium center electrode for unmatched spark efficiency - • **OE-Level Quality Assurance:** Meets strict original equipment standards for fit, durability, and emissions ## Overview The Denso SK20HR11 Iridium Long Life Spark Plug features a 0.7mm fine-wire iridium-tipped center electrode and platinum-tipped ground electrode, delivering superior ignitability and durability. Designed for a wide range of premium vehicles, it lasts up to three times longer than conventional plugs, withstands extreme temperatures over 4000°F, and improves fuel efficiency and engine performance while meeting strict OE standards. ## Description Denso part number 3421 (SK20HR11) is a replacement Iridium Long Life Spark Plug for:BMW: (2008-2013 128i, 2006 325i, 2006 325xi, 2007-2013 328i, 2009-2013 328i xDrive, 2007-2008 328xi, 2006 330i, 2006 330xi, 2006-2007 525i, 2006-2007 525xi, 2008-2011 528i, 2009-2010 528i xDrive, 2008 528xi, 2006-2007 530i, 2006-2007 530xi, 2007-2012 X3, 2017-2018 X4, 2007-2010 X5, 2006-2011 Z4)Cadillac: (2004 & 2010 SRX, 2005 STS)Honda: (2006 Civic, 2000-2006 Insight)INFINITI: (2003 FX35, 2005 QX56)Lexus: (2010-2023 GX460, 2008-2011 & 2013-2021 LX570)Mercedes-Benz: (2003 E55 AMG, 2005-2011 G55 AMG, 2003-2006 S55 AMG, 2003-2008 SL55 AMG, 2005-2009 SLR McLaren)Mitsubishi: (2004-2012 Eclipse, 2004-2011 Galant, 2004-2006 Lancer, 2004-2006 Outlander)Nissan: (2007 Maxima)Porsche: (2011-2019 911, 2017-2018 Cayenne)Saab: (2006-2009 9-3, 2010-2011 9-5)Toyota: (2003-2013 4Runner, 2007-2013 FJ Cruiser, 2008-2011 & 2013-2021 Land Cruiser, 2008-2022 Sequoia, 2005-2015 Tacoma, 2005-2021 Tundra)Volvo: (2008-2013 C30, 2006-2013 C70, 2004-2011 S40, 2004-2009 S60, 2007-2010 S80, 2005-2011 V50, 2004-2010 V70, 2010 XC60, 2009-2010 XC70, 2007-2010 XC90)Part number 3421 (SK20HR11) has a single ground electrode and comes with a 1.1 mm pre-sized gap. It has a 16 mm hex, a thread size of 14 mm, and a 26.5 mm reach.Denso Iridium Long Life Spark Plugs have a 360° laser-welded 0.7mm iridium tip and a platinum ground electrode. The fine-wire iridium center electrode improves ignitability and longevity. Denso Iridium Long Life Spark Plugs last up to three times as long as conventional plugs with sustained spark performance over 100,000 miles. They can endure extreme temperatures greater than 4000°F associated with high-performance ignition and special fuel systems. The properties of Denso’s patented iridium alloy allow for more horsepower, faster and easier starts, less misfires under heavy loads, and better fuel economy. Denso Iridium Long Life Spark Plugs are manufactured to the strictest OE performance, durability, and emissions standards. Review: Good quality spark plugs! - Improves gas mileage with smooth acceleration, easy installation and fits well, very durable original product, excellent price. Review: Works perfectly as replacement BMW plugs - One of the cylinders was giving a misfire and I decided to replace the previous autolite spark plug with these higher quality Denso plugs. It worked perfectly out of the box with no need to gap the plug. I would highly recommend these Denso plugs over the other brands. ## Features - Single Plug - Denso # 3421 - Extra Long Life Iridium Plug - 0.7mm Fine Wire Iridium-Tipped Center Electrode - Platinum Tipped Ground Electrode ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B002FOO884 | | Automotive Fit Type | Vehicle Specific Fit | | Best Sellers Rank | #317,772 in Automotive ( See Top 100 in Automotive ) #1,880 in Automotive Replacement Spark Plugs | | Brand | Denso | | Brand Name | Denso | | Compatible with Vehicle Type | Car, SUV, Truck | | Core Material | Copper | | Customer Reviews | 4.6 out of 5 stars 346 Reviews | | Gap Size | 1.1 Millimeters | | Global Trade Identification Number | 00042511034211 | | Included Components | Iridium Long Life Spark Plug | | Item Type Name | Iridium Long Life Spark Plug | | Item Weight | 1.76 ounces | | Manufacturer | Denso | | Manufacturer Part Number | SK20HR11 | | Manufacturer Warranty Description | Includes manufacturer provided warranty | | Model Number | 3421 (SK20HR11) | | OEM Equivalent Part Number | DAIHATSU 90048-51185-000, DAIHATSU 90919-01191-000, LEXUS 90919-01191, TOYOTA 90048-51185, TOYOTA 90919-01191 | | Thread Size | 14 mm | | Top Material Type | Iridium | | UPC | 042511034211 | | Unit Count | 1.0 Count | | Vehicle Service Type | Car, SUV, Truck | ## Product Details - **Brand:** Denso - **Core Material:** Copper - **Thread Size:** 14 mm - **Top Material Type:** Iridium - **Vehicle Service Type:** Car, SUV, Truck ## Images ![Denso (3421) SK20HR11 Iridium Long Life Spark Plug, Single Plug - Image 1](https://m.media-amazon.com/images/I/51+bqr9MqtL.jpg) ![Denso (3421) SK20HR11 Iridium Long Life Spark Plug, Single Plug - Image 2](https://m.media-amazon.com/images/I/41D9uTNVzHL.jpg) ![Denso (3421) SK20HR11 Iridium Long Life Spark Plug, Single Plug - Image 3](https://m.media-amazon.com/images/I/41mTW3uNF3L.jpg) ![Denso (3421) SK20HR11 Iridium Long Life Spark Plug, Single Plug - Image 4](https://m.media-amazon.com/images/I/318AUIDRgML.jpg) ![Denso (3421) SK20HR11 Iridium Long Life Spark Plug, Single Plug - Image 5](https://m.media-amazon.com/images/I/313RN97o5ZL.jpg) ## Questions & Answers **Q: is this spark plug compatible fit for my v6 sr5 4.o tacoma** A: Yes the exact fit for tacoma v6 4.0 great spark plugs I use them every time. **Q: My owners manual for 2014 toyoto land cruiser says these are the plugs for the 5.7 motor, same as the tundra. amazon has it wrong saying does not fit?** A: I have a 2011 Tacoma and I bought these Denso plugs and installed them. I would say that these are great plugs and considered O.E.M. replacement for Toyotas. That being said, I would caution you about trusting Amazon to sell you the correct plugs. Check your owner's manual and Toyota parts websites to be sure that you get the right ones. Cross reference the numbers as they all have slightly different specs. Changing plugs on a 4 cylinder was not easy but a V8 will be a challenge. Unfortunately, I have purchased auto parts from Amazon in the past and received the incorrect parts which I could not return. Amazon is not an authorized Toyota reseller. Also, be careful about non-Amazon vendors selling through Amazon. Their policies may be different than expected. Good luck! **Q: Does spark plug fits 08 honda civic 1.3L hybrid?** A: I don't know. check your owners manual if you have one or check online. I have a Toyota. **Q: What are these pre-gapped at? The sales page says .044" but some of the reviews say different. I know the spec gap for my Taco is .043"** A: I just bought 8 of these from a Toyota dealer. They were all gapped the same. Unfortunately, I also found out that NONE of the three gap gauges I have right now are accurate. I would say the plugs were accurately gapped at 044. 043 isn't going to hurt your Taco. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good quality spark plugs! *by L***8 on April 15, 2026* Improves gas mileage with smooth acceleration, easy installation and fits well, very durable original product, excellent price. ### ⭐⭐⭐⭐⭐ Works perfectly as replacement BMW plugs *by P***L on March 22, 2026* One of the cylinders was giving a misfire and I decided to replace the previous autolite spark plug with these higher quality Denso plugs. It worked perfectly out of the box with no need to gap the plug. I would highly recommend these Denso plugs over the other brands. ### ⭐⭐⭐⭐⭐ Same as what came from the factory *by G***A on July 20, 2024* Identical to the plugs that came in the engine from the factory. Top quality. The plugs still have the original gap after over 100,000 miles. Changed to avoid risk of damage to the aluminum threads in the engine from buildup of combustion by products. Third time to change the plugs at a little over 300,000 miles. ## Frequently Bought Together - Denso (3421) SK20HR11 Iridium Long Life Spark Plug, Single Plug - LEXIVON 5/8" Swivel Magnetic Spark Plug Socket, 3/8" Drive x 10" Total Length | Enhanced Magnetic Design with Thin Wall Socket, Cr-v Steel (LX-122) - DENSO -SK20HR11- IRIDIUM PLATINUM power pack Spark Plugs - # 3421-4 PCS * NEW * --- ## 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.gr/products/7467342-denso-3421-sk20hr11-iridium-long-life-spark-plug-single-plug](https://www.desertcart.gr/products/7467342-denso-3421-sk20hr11-iridium-long-life-spark-plug-single-plug) --- *Product available on Desertcart Greece* *Store origin: GR* *Last updated: 2026-06-02*