---
product_id: 611828337
title: "NGK Iridium IX Spark Plug - 3903 (Pack of 2)"
brand: "ngk"
price: "¥9387"
currency: JPY
in_stock: false
reviews_count: 8
category: "Ngk"
url: https://www.desertcart.jp/products/611828337-ngk-iridium-ix-spark-plug-3903-pack-of-2
store_origin: JP
region: Japan
---

# Iridium core for superior conductivity Optimized combustion for better fuel efficiency Fine wire electrode for quicker starts NGK Iridium IX Spark Plug - 3903 (Pack of 2)

**Brand:** ngk
**Price:** ¥9387
**Availability:** ❌ Out of Stock

## Summary

> ⚡ Ignite your drive with NGK Iridium IX – where power meets precision!

## Quick Answers

- **What is this?** NGK Iridium IX Spark Plug - 3903 (Pack of 2) by ngk
- **How much does it cost?** ¥9387 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/611828337-ngk-iridium-ix-spark-plug-3903-pack-of-2)

## Best For

- ngk enthusiasts

## Why This Product

- Trusted ngk brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Fuel-Savvy Design:** Enhances combustion efficiency to stretch every drop of fuel
- • **Precision Iridium Core:** Engineered for unmatched durability and peak performance
- • **Universal Compatibility:** Perfect fit for motorcycles, cars, and even lawnmowers—upgrade all your rides
- • **Long-Lasting Reliability:** Invest once, enjoy consistent power without frequent replacements
- • **Rapid Ignition Technology:** Fine wire electrode ensures faster, smoother starts every time

## Overview

The NGK Iridium IX Spark Plug (Model BPR6EIX-11) is a high-performance, durable spark plug featuring a fine wire iridium electrode that delivers faster ignition, improved idle quality, and enhanced fuel efficiency. Sold in packs of two, it suits a wide range of vehicles including motorcycles, cars, and small engines, offering long-lasting reliability and superior combustion performance.

## Description

Buy NGK Iridium IX Spark Plug - 3903 (Pack of 2): Spark Plugs - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Worth the extra money - NGK Iridium Nines are great plugs. I run them in multiple motorcycles and cars. I needed a new plug for my Honda lawnmower and decided to splurge. It’s probably overkill for the application but I will never need to replace it!
Review: Easier starting and Improved idle - NGK Iridium plugs are a real improvement over all other spark plugs. The fine wire electrode improves starting and idle quality. Fuel economy is also likely slightly improved.

## Features

- The information below is per-pack only
- SPARK_PLUG
- Model Number: BPR6EIX-11
- Vehicle Specific
- Item_Weight 0.055 kilograms

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CDQNSQHR |
| Best Sellers Rank | #251,603 in Automotive ( See Top 100 in Automotive ) #48 in Automotive Performance Spark Plugs #1,541 in Automotive Replacement Spark Plugs |
| Brand Name | NGK |
| Core Material | Iridium |
| Customer Reviews | 4.5 out of 5 stars 51 Reviews |
| Item Height | 3.3 centimeters |
| Item Type Name | Spark Plug |
| Item Weight | 0.11 Kilograms |
| Manufacturer | NGK |
| Manufacturer Part Number | BPR6EIX-11 |
| Unit Count | 2.0 Count |

## Images

![NGK Iridium IX Spark Plug - 3903 (Pack of 2) - Image 1](https://m.media-amazon.com/images/I/3171UsGVplS.jpg)
![NGK Iridium IX Spark Plug - 3903 (Pack of 2) - Image 2](https://m.media-amazon.com/images/I/415+lVYlo1L.jpg)
![NGK Iridium IX Spark Plug - 3903 (Pack of 2) - Image 3](https://m.media-amazon.com/images/I/71qNkG-N0LL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Worth the extra money
*by T***N on July 24, 2025*

NGK Iridium Nines are great plugs. I run them in multiple motorcycles and cars. I needed a new plug for my Honda lawnmower and decided to splurge. It’s probably overkill for the application but I will never need to replace it!

### ⭐⭐⭐⭐⭐ Easier starting and Improved idle
*by S***R on November 23, 2018*

NGK Iridium plugs are a real improvement over all other spark plugs. The fine wire electrode improves starting and idle quality. Fuel economy is also likely slightly improved.

### ⭐⭐⭐⭐⭐ Five Stars
*by D***L on December 11, 2014*

Great price and perfect fit

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**Shop now:** [https://www.desertcart.jp/products/611828337-ngk-iridium-ix-spark-plug-3903-pack-of-2](https://www.desertcart.jp/products/611828337-ngk-iridium-ix-spark-plug-3903-pack-of-2)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-03-03*