# IZFR5K11 NGK Iridium Spark Plug | Genuine NGK Spark Plug

## 🔧 Product Description

**NGK Iridium Spark Plug – Part Number: IZFR5K11**

NGK iridium spark plugs feature an iridium alloy on the centre electrode, welded on with a laser – one of the world's hardest metals, with a melting point of 2450°C, giving very high resistance to spark erosion and, on average, double the service life of a standard nickel spark plug.

## ⚙️ Key Features

-   Fine iridium-tipped centre electrode and platinum-tipped ground electrode for a slow wear rate, stable idle, improved fuel efficiency and lower emissions
-   Longer service life
-   Trivalent metal plating provides superior anti-corrosion and anti-seizing properties
-   Corrugated ribs reduce the risk of flashover
-   Pure alumina silicate ceramic insulator, providing superior strength and better heat transfer
-   Triple seals prevent leakage
-   Copper core aids in heat removal

## 📏 Specifications

-   NGK stock number: 3657
-   Thread: 14 mm
-   Reach: 19 mm (3/4 in)
-   Hex: 16 mm (5/8 in)
-   Seat: Gasket
-   Terminal: Solid
-   Type: ISO Extended Projection Wide Gap

## 🚘 Application

Listed in NGK's application charts for automotive vehicles.

-   Acura MDX (2006-2003) – 6 per engine
-   Honda Odyssey (2010-2005) – 6 per engine
-   Honda Pilot (2008-2006) – 6 per engine
-   Honda Ridgeline (2008-2006) – 6 per engine
-   Saturn Vue (2007-2004) – 6 per engine

## 🔄 Supersession & Cross Reference

NGK's cross-reference tables list this plug against these part numbers.

-   DENSO: 3422, 4503, 4701, 5628, IK16TT, PK16TT, SKJ16DR-M11, VK16PRZ-11
-   Bosch: 6721, 8112, 9604, FR7LII33X
-   Champion: 9000, RC10ZWYPB4
-   ACDelco: 12582002
-   Autolite: XP5224

## 📦 Condition

-   Brand new genuine product
-   Supplied in original packaging

## Details

- **Price:** 49.0 AUD
- **Vendor:** NGK
- **Type:** Ignition & Controls

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 49.00 AUD | In stock |

## Images

- IZFR5K11 NGK iridium spark plug

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/izfr5k11-ngk-iridium-spark-plug-genuine-ngk-spark-plug)
> Updated: 2026-09-03