---
product_id: 7467342
title: "Denso (3421) SK20HR11 Iridium Long Life Spark Plug, Single Plug"
brand: "denso"
price: "฿1547"
currency: THB
in_stock: true
reviews_count: 12
category: "Denso"
url: https://www.desertcart.co.th/products/7467342-denso-3421-sk20hr11-iridium-long-life-spark-plug-single-plug
store_origin: TH
region: Thailand
---

# extra long life durability 0.7mm fine wire iridium tip platinum-tipped ground electrode Denso (3421) SK20HR11 Iridium Long Life Spark Plug, Single Plug

**Brand:** denso
**Price:** ฿1547
**Availability:** ✅ In Stock

## Summary

> ⚡ Ignite your drive with precision and power — don’t get left behind!

## Quick Answers

- **What is this?** Denso (3421) SK20HR11 Iridium Long Life Spark Plug, Single Plug by denso
- **How much does it cost?** ฿1547 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/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

- • **Unmatched Longevity:** Engineered for extended lifespan, these plugs maintain optimal gap and performance beyond 100,000 miles.
- • **Fuel Efficiency Booster:** Consistent ignition helps maintain peak fuel economy, saving you money on every drive.
- • **Corrosion-Resistant Design:** Platinum-tipped ground electrode resists wear and combustion buildup, protecting your engine’s integrity.
- • **Factory-Grade Fit & Finish:** Exact OEM specifications guarantee seamless installation and perfect compatibility with your vehicle.
- • **Precision Ignition Performance:** 0.7mm iridium center electrode ensures faster, more reliable sparks for smoother acceleration.

## Overview

The Denso SK20HR11 Iridium Long Life Spark Plug features a 0.7mm fine wire iridium center electrode and a platinum-tipped ground electrode, delivering superior ignition performance and durability. Designed to OEM standards, it offers extended service life beyond 100,000 miles, maintaining fuel efficiency and smooth acceleration for vehicles like the Toyota Tacoma and Lexus. Trusted by professionals, this spark plug combines cutting-edge materials with proven reliability to keep your engine running at peak performance.

## Description

Denso (3421) SK20HR11 Iridium Long Life Spark Plug, Single Plug

Review: Three years ago we had our mechanic install them. - They have passed the extended drive test: Have several thousand miles on these Denso spark plugs now. The 2008 Toyota Tacoma 4-cylinder is running smooth, maintains fuel economy, and has consistent acceleration .
Review: Same as what came from the factory - 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.

## 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 | #78,736 in Automotive ( See Top 100 in Automotive ) #509 in Automotive Replacement Spark Plugs |
| Brand | Denso |
| Core Material | Iridium |
| Customer Reviews | 4.5 4.5 out of 5 stars (340) |
| Date First Available | October 10, 2007 |
| Global Trade Identification Number | 00042511034211 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 0.01 ounces |
| Item model number | SK20HR11 |
| Manufacturer | Denso |
| Manufacturer Part Number | 3421 |
| Model | Spark Plug |
| OEM Part Number | DAIHATSU 90048-51185-000, DAIHATSU 90919-01191-000, LEXUS 90919-01191, TOYOTA 90048-51185, TOYOTA 90919-01191 |
| Position | Left |
| Thread Size | 1.25mm |
| Top Material Type | Platinum |
| UPC | 042511034211 |
| Vehicle Service Type | Car, Truck |

## Product Details

- **Brand:** Denso
- **Core Material:** Iridium
- **Thread Size:** 1.25mm
- **Top Material Type:** Platinum
- **Vehicle Service Type:** Car, Truck

## Images

![Denso (3421) SK20HR11 Iridium Long Life Spark Plug, Single Plug - Image 1](https://m.media-amazon.com/images/I/41mLLmfWMlL.jpg)
![Denso (3421) SK20HR11 Iridium Long Life Spark Plug, Single Plug - Image 2](https://m.media-amazon.com/images/I/41MXpVW5jJL.jpg)
![Denso (3421) SK20HR11 Iridium Long Life Spark Plug, Single Plug - Image 3](https://m.media-amazon.com/images/I/31HfaxI5JlL.jpg)
![Denso (3421) SK20HR11 Iridium Long Life Spark Plug, Single Plug - Image 4](https://m.media-amazon.com/images/I/319PBAinsBL.jpg)
![Denso (3421) SK20HR11 Iridium Long Life Spark Plug, Single Plug - Image 5](https://m.media-amazon.com/images/I/41FzrGFUUmL.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

### ⭐⭐⭐⭐⭐ Three years ago we had our mechanic install them.
*by R***N on April 11, 2025*

They have passed the extended drive test: Have several thousand miles on these Denso spark plugs now. The 2008 Toyota Tacoma 4-cylinder is running smooth, maintains fuel economy, and has consistent acceleration .

### ⭐⭐⭐⭐⭐ 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.

### ⭐⭐⭐⭐⭐ Pre gapped awesomeness
*by B***B on January 6, 2026*

Easy to install. They came pre gapped. 0.044 for tacoma.

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-02-17*