---
product_id: 272580494
title: "BOSCH 9621 OE Fine Wire Double Iridium Spark Plug - Single"
brand: "bosch"
price: "₱1623"
currency: PHP
in_stock: true
reviews_count: 5
category: "Bosch"
url: https://www.desertcart.ph/products/272580494-bosch-9621-oe-fine-wire-double-iridium-spark-plug-single
store_origin: PH
region: Philippines
---

# 4X longer lifespan 24% less voltage needed Corrosion-resistant nickel threads BOSCH 9621 OE Fine Wire Double Iridium Spark Plug - Single

**Brand:** bosch
**Price:** ₱1623
**Availability:** ✅ In Stock

## Summary

> ⚡ Spark your drive with Bosch’s double iridium power — because your engine deserves the best!

## Quick Answers

- **What is this?** BOSCH 9621 OE Fine Wire Double Iridium Spark Plug - Single by bosch
- **How much does it cost?** ₱1623 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ph](https://www.desertcart.ph/products/272580494-bosch-9621-oe-fine-wire-double-iridium-spark-plug-single)

## Best For

- bosch enthusiasts

## Why This Product

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

## Key Features

- • **OEM Perfect Fit:** Meets or exceeds original equipment specs for seamless compatibility with modern GDI engines.
- • **Built to Outlast:** Experience 4 times the durability of standard copper plugs, reducing replacements and downtime.
- • **Trusted Brand Legacy:** Bosch’s double iridium tech delivers consistent performance across top vehicle models.
- • **Ignite with Precision:** 360° laser-welded ultra-fine iridium wire ensures superior ignitability and engine efficiency.
- • **Effortless Installation:** Pre-gapped and nickel-plated threads mean no anti-seize needed—get back on the road faster.

## Overview

The Bosch 9621 OE Fine Wire Double Iridium Spark Plug features a 360-degree laser-welded ultra-fine iridium firing pin and ground electrode, delivering 4X longer life and up to 24% reduced voltage requirements compared to standard plugs. Nickel-plated rolled threads resist corrosion and eliminate the need for anti-seize, while factory pre-gapping ensures quick, hassle-free installation. Designed to meet or exceed OEM standards, it’s compatible with a wide range of modern gasoline engines, including GDI models from Infiniti, Lexus, Mazda, Nissan, and more.

## Description

From the manufacturer The Best of OE Technology OE Extreme durability and longest life are achieved through 360-degree continuous laser welding to fuse the iridium firing pin Exceptional ignitability and performance comes from the ultra fine wire design, while the copper core provides broader heat range to eliminate pre-ignition and fouling Longer Service Life Fine wire firing pin reduces voltage requirement Copper core ground electrode (when required) provides better heat transfer No Anti-Seize Nickel-plated shell with rolled threads requires no anti-seize Complete anti-seize and corrosion protection built into the nickel-plated shell No Gapping Needed Ribbed insulator design prevents flashover Bosch - Trusted in the world's most advanced engines Since 1902, Bosch has set the standard in spark plug technology with innovative, performance-proven products trusted by original equipment manufacturers worldwide Production takes place in the most sophisticated manufacturing facilities, where Bosch quality control standards assure that every plug bearing Bosch name earns it

Review: That isn't my order. - I placed an order for two Spark Plugs for AUDI A4 B5 however, I have received two spark plugs which one is larger and thinner than the other. I need either the order for the missing spark plug or a refund. I believe the the thin long one will not match the car. Please see the photo
Review: 2015 Mazda CX5 - We purchased these spark plugs for our 2015 Mazda CX-5, and they were fully compatible with the vehicle. Installation was straightforward and beginner-friendly, making it a manageable project even for those with limited automotive experience. Prior to replacing the spark plugs, our Mazda was experiencing noticeable hesitation and displaying a cylinder 1 misfire code. After installing this set, the issue was completely resolved, and the vehicle has been running smoothly ever since. The product met our expectations in terms of quality, performance, and overall value. One detail worth noting is that although the listing may suggest a single item, the package actually includes a complete set of four spark plugs, which was a pleasant surprise. I did not take photos of the new spark plugs, but I have included a picture of the worn-out plugs that were removed from the vehicle for reference. Overall, I would recommend this product to anyone looking for a reliable replacement. If engine issues persist after installation, it may indicate a different underlying mechanical problem rather than an issue with the spark plugs themselves.

## Features

- Bosch Double Iridium Spark Plugs feature both an iridium firing pin and an iridium ground electrode inlay that offer higher performance and 4X longer life compared to standard copper spark plugs
- 360-degree laser welded ultra-fine wire iridium firing pin provides better ignitability - reducing voltage requirements up to 24% - and enhanced durability
- Nickel-plated rolled threads provide superior resistance to corrosion and do not require anti-seize - making installation quick and easy
- Bosch Double Iridium spark plugs are pre-gapped at the factory and ready to install right out of the box - gap adjustment prior to installation not required
- Meets or exceeds manufacturer design requirements for OE fit, form, and function for modern gasoline engines - including Gasoline Direct Injection (GDI) engines
- Compatible with select vehicles (Note: engine affects fitment - verify specific fitment details with desertcart confirmed fit fit checker above): INFINITI: 2008-12 EX35, 2013 EX37, 2009-12 FX35, 2013 FX37, 2009-13 FX50, 2011-12 G25, 2007-08 G35, 2008-13 G37
- Compatible with (continued):LEXUS: 2013 JX35, 2009-10 M35, 2012-13 M35h, 2011-13 M37, 2011-13 M56, 2015 Q40, 2014-18 Q50, 2014-16 Q60, 2014-19 Q70, 2015-19 Q70L, 2014-17 QX50, 2011-13 QX56, 2014-23 QX60, 2014-20 QX70, 2014-23 QX80
- Compatible with (continued): MAZDA: 2015-16,2018-21 2, 2012-23 3, 2014-21 6, 2016-21 CX-3, 2020-23 CX-30, 2013-23 CX-5, 2023 CX-50, 2016-23 Miata; NISSAN: 2007-09 350Z, 2009-20 370Z, 2007-23 Altima, 2017-22 Armada, 2006-08 Frontier, 2020-23 Frontier
- Compatible with (continued): NISSAN: 2009-23 Maxima, 2009-23 Murano, 2020 NV200, 2018-21 NV2500, 2018-21 NV3500, 2013-23 Pathfinder, 2011-17 Quest, 2008-13 Rogue, 2014-15 Rogue Select, 2007-22 Sentra, 2017-23 Titan, 2016-23 Titan XD
- Compatible with (continued): PONTIAC: 2009-10 Vibe; SCION: 2016 iA; TOYOTA: 2016-20 Yaris, 2017-18 Yaris iA, 2016-20 Yaris R

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B005GN1THO |
| Automotive Fit Type | Vehicle Specific Fit |
| Best Sellers Rank | #543,226 in Automotive ( See Top 100 in Automotive ) #2,898 in Automotive Replacement Spark Plugs |
| Brand Name | Bosch |
| Compatible with Vehicle Type | Car, Truck |
| Core Material | Iridium |
| Customer Reviews | 4.6 4.6 out of 5 stars (169) |
| Gap Size | 0.04 Inches |
| Global Trade Identification Number | 00028851034258 |
| Included Components | spark plug |
| Item Type Name | Spark Plug |
| Item Weight | 0.09 Pounds |
| Manufacturer | Bosch Automotive |
| Manufacturer Part Number | 9621 |
| Manufacturer Warranty Description | Limited |
| Model Number | 9621_1 |
| OEM Equivalent Part Number | 9621 |
| Thread Size | 12mm |
| Top Material Type | Nickel |
| UPC | 028851034258 |

## Product Details

- **Brand:** BOSCH
- **Core material:** Iridium
- **Thread size:** 12mm
- **Top material type:** Nickel
- **Vehicle service type:** Car

## Images

![BOSCH 9621 OE Fine Wire Double Iridium Spark Plug - Single - Image 1](https://m.media-amazon.com/images/I/71FZXJroy2L.jpg)
![BOSCH 9621 OE Fine Wire Double Iridium Spark Plug - Single - Image 2](https://m.media-amazon.com/images/I/7146NFBC01L.jpg)

## Customer Reviews

### ⭐ That isn't my order.
*by M***I on 18 December 2020*

I placed an order for two Spark Plugs for AUDI A4 B5 however, I have received two spark plugs which one is larger and thinner than the other. I need either the order for the missing spark plug or a refund. I believe the the thin long one will not match the car. Please see the photo

### ⭐⭐⭐⭐⭐ 2015 Mazda CX5
*by J***A on 11 June 2026*

We purchased these spark plugs for our 2015 Mazda CX-5, and they were fully compatible with the vehicle. Installation was straightforward and beginner-friendly, making it a manageable project even for those with limited automotive experience. Prior to replacing the spark plugs, our Mazda was experiencing noticeable hesitation and displaying a cylinder 1 misfire code. After installing this set, the issue was completely resolved, and the vehicle has been running smoothly ever since. The product met our expectations in terms of quality, performance, and overall value. One detail worth noting is that although the listing may suggest a single item, the package actually includes a complete set of four spark plugs, which was a pleasant surprise. I did not take photos of the new spark plugs, but I have included a picture of the worn-out plugs that were removed from the vehicle for reference. Overall, I would recommend this product to anyone looking for a reliable replacement. If engine issues persist after installation, it may indicate a different underlying mechanical problem rather than an issue with the spark plugs themselves.

### ⭐⭐⭐⭐⭐ Doble Iridium tips
*by A***A on 27 January 2026*

Very good quality

## Frequently Bought Together

- BOSCH 9621 OE Fine Wire Double Iridium Spark Plug - Single
- Mobil 1 Extended Performance Full Synthetic Motor Oil 0W-20, 5 Quart
- K&N Select Oil Filter: Designed to Protect your Engine: Fits Select INFINITI/MAZDA/NISSAN/SUBARU Vehicle Models (See Product Description for Full List of Compatible Vehicles), SO-1008

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*Product available on Desertcart Philippines*
*Store origin: PH*
*Last updated: 2026-07-24*