# 21406678 Adapter | Genuine Volvo Penta Part

🔧 Product Description

  

Genuine Volvo Penta Ignition and Control System Adapter - Part Number: 21406678

  

A precision interface adapter used within a Volvo Penta ignition or control-system installation. It provides the correct mechanical or electrical transition between the connected control component and the original engine or helm hardware.

  

⚙️ Key Features

  

• Genuine Volvo Penta control-system adapter

• Correct factory interface dimensions

• Maintains alignment and secure attachment

• Used in ignition and control-system assemblies

• Direct replacement where 21406678 is specified

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 21406678 (current catalogued reference)

  

OEM / Related Numbers:

  

• 21406678

• Associated Volvo Penta ignition or control-system hardware

  

Aftermarket / Verified Equivalents:

  

• No aftermarket equivalent

  

🚤 Compatibility

  

Commonly used on:

  

• Volvo Penta ignition and control systems specifically listing adapter 21406678

  

Typically suits:

  

• Engine models:

• Fitment is controlled by the complete engine, drive or control-system serial number

  

• HP Range: Application dependent

• Engine Type: Volvo Penta marine petrol or diesel control system

• Year Range: Control-system generation dependent

  

🔌 Function

  

Adapts the connected control or ignition component to the required mounting or connection interface.

  

Common signs of failure:

  

• Loose or misaligned control component

• Damaged threads or mounting surfaces

• Intermittent electrical contact where used as an electrical interface

• Cracking or distortion

• Repeated fastener or seal failure

  

📦 Condition

  

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 176.73 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 176.73 AUD | In stock |

## Images

- 21406678 Adapter | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21406678-adapter-genuine-volvo-penta)
> Updated: 2026-08-02