---
product_id: 1252984
title: "BOSCH 9603 OE Fine Wire Double Iridium Spark Plug - Single"
brand: "bosch"
price: "€ 21.34"
currency: EUR
in_stock: true
reviews_count: 13
category: "Bosch"
url: https://www.desertcart.es/products/1252984-bosch-9603-oe-fine-wire-double-iridium-spark-plug-single
store_origin: ES
region: Spain
---

# 4X longer lifespan 24% less voltage needed No anti-seize needed BOSCH 9603 OE Fine Wire Double Iridium Spark Plug - Single

**Brand:** bosch
**Price:** € 21.34
**Availability:** ✅ In Stock

## Summary

> ⚡ Power your drive with Bosch Double Iridium — where performance meets longevity!

## Quick Answers

- **What is this?** BOSCH 9603 OE Fine Wire Double Iridium Spark Plug - Single by bosch
- **How much does it cost?** € 21.34 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.es](https://www.desertcart.es/products/1252984-bosch-9603-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

- • **Built to Outlast:** Experience 4X the durability of standard copper plugs—less hassle, more miles.
- • **Ignite with Precision:** 360° laser-welded ultra-fine iridium wire for unmatched ignitability and engine responsiveness.
- • **OE-Grade Compatibility:** Designed to meet or exceed original equipment specs, perfect for modern GDI engines.
- • **Effortless Installation:** Nickel-plated rolled threads resist corrosion and eliminate the need for anti-seize compounds.
- • **Ready Right Out of the Box:** Factory pre-gapped for perfect fit and performance—skip the guesswork.

## Overview

Bosch 9603 OE Double Iridium Spark Plug delivers superior ignitability with a 360-degree laser-welded ultra-fine iridium firing pin, reducing voltage requirements by up to 24%. Engineered for 4X longer life than standard copper plugs, it features corrosion-resistant nickel-plated rolled threads that require no anti-seize, and comes pre-gapped for easy installation. Compatible with a wide range of modern gasoline engines, including Gasoline Direct Injection (GDI) systems, it ensures OE-level fit, form, and function for enhanced engine performance and reliability.

## Description

Product Description Bosch Double Iridium Spark Plugs are engineered to deliver both high performance and long life, representing advanced original equipment (OE) spark plug technology. The ultra-fine wire design and laser welded tapered ground electrode deliver optimum performance, while the iridium center electrode and iridium ground electrode inlay help it to go the distance. OE-matched spark position ensures compatibility with Gasoline Direct Injection (GDI) technology used in modern gas engines. Bosch Double Iridium Spark Plugs are pre-gapped at the factory and feature nickel plated rolled threads that require no anti-seize, for simple, easy installation right out of the box. Unlock the performance in your engine with Bosch Double Iridium Spark Plugs. brand_description Bosch Automotive

Review: Good performance and better gas mileage. - The plugs I received were made in Germany. The plugs are almost half the cost of Denso and they perform just as well. I would recommend these plugs.
Review: Solid, reliable park plugs - I got these for my 2002 GS430 and boy do they help get all the power out of my engine. I have an exhaust leak and trans leak that leads to a laggy bogged down performance, but by swapping out with these plugs yearly I can keep the power more responsive. I tried other plugs, but these seem to do the best for me in my case. Installation was straight forward and these tightened in place great with a little bit of antiseize.

## 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 including, but not limited to, the following (Note: engine affects fitment - verify specific fitment details with desertcart confirmed fit fit checker above): ACURA: 92-01 Integra, 91-95 Legend, 91-05 NSX; HONDA: 11-16 CR-Z
- Compatible with (cont): JAGUAR: 01 XJ8, 98-01 XJR, 00-02 XKR; LEXUS: 94-06 ES300/330, 98-00 GS400, 01-07 GS430, 03-09 GX470, 10-12 HS250h, 90-94,97-00 LS400, 01-06 LS430, 98-07 LX470, 99-06 RX300/330, 06-08 RX400h, 92-94 SC300, 92-00 SC400, 02-10 SC430
- Compatible with (cont): LINCOLN: 00-06 LS; MERCEDES-BENZ: 02-04 C32, 05-07 C55, 03-06 CLK55, 00-04 SLK230, 02-04 SLK32, 06-11 SLK55; MITSUBISHI: 11-17 Lancer, 11-20 Outlander Sport; NISSAN: 99-01 Altima, 99-00 Frontier, 98-00 Pathfinder
- Compatible with (cont): PONTIAC: 03-06,09-10 Vibe; SCION: 05-10 tC, 08-12 xB; SUBARU: 10-13 Legacy, 10-15 Outback; SUZUKI: 06-08 Grand Vitara, 04-11 Swift/Swift+, 04-06 Verona, 05-06 XL-7; TOYOTA: 03-09 4Runner, 95-04 Avalon, 92-11 Camry
- Compatible with (cont): TOYOTA: 92-05 Celica, 05-06,09-10,12-13 Corolla, 01-10 Highlander, 98-07 Land Cruiser, 03-06,09-12 Matrix, 92-95 MR2, 96-08 RAV4, 05-12 Sequoia, 98-06 Sienna, 99-08 Solara, 93-98 Supra, 05-10 Tundra; VOLVO: 07-10 S80, 05-11 XC90

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00515NH4K |
| Automotive Fit Type | Vehicle Specific Fit |
| Best Sellers Rank | #702,645 in Automotive ( See Top 100 in Automotive ) #3,756 in Automotive Replacement Spark Plugs |
| Brand | Bosch |
| Core Material | Iridium |
| Customer Reviews | 4.6 4.6 out of 5 stars (874) |
| Date First Available | June 1, 2011 |
| Exterior | Machined |
| Global Trade Identification Number | 00028851010375 |
| Item Weight | 0.8 ounces |
| Item model number | 9603_1 |
| Manufacturer | Bosch Automotive |
| Manufacturer Part Number | 9603 |
| Model | Spark Plug |
| OEM Part Number | 9603 |
| Position | Front, Rear |
| Product Dimensions | 4 x 7 x 9 inches |
| Thread Size | 1.25mm |
| Top Material Type | Nickel |
| UPC | 028851010375 |
| Vehicle Service Type | Car |

## Product Details

- **Brand:** Bosch
- **Core Material:** Iridium
- **Thread Size:** 1.25mm
- **Top Material Type:** Nickel
- **Vehicle Service Type:** Car

## Images

![BOSCH 9603 OE Fine Wire Double Iridium Spark Plug - Single - Image 1](https://m.media-amazon.com/images/I/71tqIg+ETUL.jpg)

## Questions & Answers

**Q: what is the gap preset on these spark plugs in inches?**
A: Most Bosch Spark Plugs are factory pre-gapped for popular vehicle applications. The gap measurements are indicated either on the box, or by the part number located on the spark plug shell.     X suffix = .044"    Y suffix = .060"    Z suffix = .080". However, it must be noted that wire-tip or needle-tip plugs can afford to have larger gaps as the spark occurs at a lower voltage if one end is pointed, leading to a wider spark and better combustion of the fuel-air mixture. Gaps should never be adjusted on the OE-Fine Wire-tipped plugs - should never be gapped by the installer. Attempts to do so might damage the plug/the delicate tip. What is more important is all the plugs should have equal gaps, or there might be engine knocking and vibrations.

**Q: Will this work for Lawnmower ?**
A: Only if your lawn mower has a 2.2L 4 cylinder engine.

**Q: uses 14MM socket?**
A: 14mm socket is standard - 10mm and 12mm are less common, found in only some motorcycles. What is more important is the thread reach - too little or too much are both bad. Amazon has a nice system of  selecting the vehicle and showing which plugs fit that vehicle. Bosch has a similar system at BoschAutoParts.com. Remember to NEVER gap-adjust iridium plugs.

**Q: Will this work for honda crv 2016?**
A: Bosch 9603 does not fit the 2016 Honda CR-V. The correct Bosch spark plug for this application is 96310. Thank you for your question.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good performance and better gas mileage.
*by Q***Q on October 1, 2025*

The plugs I received were made in Germany. The plugs are almost half the cost of Denso and they perform just as well. I would recommend these plugs.

### ⭐⭐⭐⭐⭐ Solid, reliable park plugs
*by S***N on March 4, 2024*

I got these for my 2002 GS430 and boy do they help get all the power out of my engine. I have an exhaust leak and trans leak that leads to a laggy bogged down performance, but by swapping out with these plugs yearly I can keep the power more responsive. I tried other plugs, but these seem to do the best for me in my case. Installation was straight forward and these tightened in place great with a little bit of antiseize.

### ⭐⭐⭐⭐⭐ Great Product
*by L***. on September 15, 2022*

Purchased this product for my 2004 Toyota Tundra and so far it is doing the job as intended. My truck now accelerate as it should without any hesitation. It arrived well packaged and gapped. A great replacement at a great price!

## Frequently Bought Together

- BOSCH 9603 OE Fine Wire Double Iridium Spark Plug - Single
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*Product available on Desertcart Spain*
*Store origin: ES*
*Last updated: 2026-01-22*