# BPR5EIX NGK Iridium Spark Plug | Genuine NGK Spark Plug

## 🔧 Product Description

**NGK Iridium Spark Plug – Part Number: BPR5EIX**

Iridium NGK spark plugs offer a longer service life than a standard nickel-tipped spark plug: while nickel-alloy plugs offer a service life of roughly 20,000-40,000km, NGK Iridium IX spark plugs offer a service life of up to 60,000km, so fewer replacements are needed over time despite the higher initial cost.

Precious-metal spark plugs like the NGK Iridium IX also offer higher ignitability, achieved with an exposed fine-tip centre electrode that promotes superior flame growth compared with a standard spark plug. Iridium has a much higher melting point (2410°C) than nickel (1453°C), allowing the centre electrode diameter to be reduced from 2.5mm to 0.6mm – a smaller electrode mass that reduces the impedance to flame progress, helping acceleration, fuel consumption and idle quality.

## ⚙️ Key Features

-   Fine iridium-tipped centre electrode for a slow wear rate and stable idle
-   Longer service life than standard nickel plugs
-   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
-   Copper core aids in heat removal
-   Triple seals prevent leakage

## 📏 Specifications

-   NGK stock number: 6597
-   Thread: 14 mm
-   Reach: 19 mm (3/4 in)
-   Hex: 20.8 mm (13/16 in)
-   Seat: Gasket
-   Type: Projected

## 🚘 Application

Listed in NGK's application charts for marine, motorcycle, ATV and snowmobile equipment and automotive vehicles. The gap is not the same on all of them – the chart lists between 0.5 mm and 1.0 mm depending on the engine, so check the line for yours.

-   Bmw B130 – Inboard Engine
-   Bmw B130S – Inboard Engine
-   Bmw B190 – Inboard Engine
-   Bmw B1901 – Inboard Engine
-   Bmw B190S – Inboard Engine
-   Bmw B220 – Inboard Engine
-   Bmw B2201 – Inboard Engine
-   Bmw B220S – Inboard Engine
-   Bmw G1301 – Inboard Engine
-   Bmw G130S – Inboard Engine
-   Bmw G1901 – Inboard Engine
-   Bmw G190S – Inboard Engine
-   Bmw G2201 – Inboard Engine
-   Bmw G220S – Inboard Engine
-   Honda BF50F (50 HP) – Outboard Engine
-   Honda BF50 (5 HP) – Outboard Engine
-   Honda BF5A (5 HP) – Outboard Engine
-   Alpha ALL MODELS – Motorcycle
-   Aprilia TL 320 (320, 1986) – Motorcycle
-   Aprilia CLIMBER (276, 1998-1989) – Motorcycle
-   Aprilia TX300 (276, 1984) – Motorcycle
-   Aprilia TX311 M (276, 1984) – Motorcycle
-   Aprilia TXR312 M (276, 1986) – Motorcycle
-   Bultaco ALPINA 166 (350) – Motorcycle
-   Bultaco ALPINA 188 (350) – Motorcycle

That is the 25 most common of 276 applications NGK's charts list for this plug – ask us to check yours.

## 🔄 Supersession & Cross Reference

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

-   DENSO: 3030, 3231, 4018, 4709, 5305, IW16, IW20TT, W16EP-ZU and 2 more
-   Bosch: 4218, 4220, 4507, W9DP, WGR9DQI, WR8DP, WR8DS, WR9DP and 1 more
-   Autolite: XS65, XS65DP
-   ACDelco: 4
-   Beck Arnley: 1765283
-   Champion: RN12GY
-   Torch: F5RTP

## 📦 Condition

-   Brand new genuine product
-   Supplied in original packaging

## Details

- **Price:** 39.0 AUD
- **Vendor:** NGK
- **Type:** Ignition & Controls

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 39.00 AUD | In stock |

## Images

- BPR5EIX NGK iridium spark plug
- BPR5EIX NGK iridium spark plug firing end

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/bpr5eix-ngk-iridium-spark-plug-genuine-ngk-spark-plug)
> Updated: 2026-09-03