# 21840786 Filler Neck | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta DEF Tank Filler Neck - Part Number: 21840786

Remote filler neck used with the Volvo Penta 70-litre DEF/AdBlue tank installation. It provides the specified cap seat and hose interface for filling the SCR dosing-fluid tank.

  

⚙️ Key Features

• Matched to 70-litre DEF tank 21839998

• DEF/AdBlue-compatible construction

• Factory cap and gasket interface

• Remote filler mounting geometry

• Correct fill-hose connection size

  

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 21840786 (current OEM reference)

  

OEM / Related Numbers:

• 21840786

• 21839998 (related 70-litre DEF tank)

• 21509071 (related gasket)

• 17248402 / 23029052 (related filler caps)

  

Aftermarket / Verified Equivalents:

• No aftermarket equivalent

  

🚤 Compatibility

Commonly used on:

• Volvo Penta industrial SCR aftertreatment system

• 70-litre DEF tank installation

  

Typically suits:

• Engine models:

• Match by the Volvo Penta engine, drive or installation product number and serial number before ordering.

• Engine Type: Emissions-controlled industrial diesel with SCR

• Serial Range: Confirm tank and filler package by installation reference

  

🔌 Function

Provides the sealed external filling point for the 70-litre DEF tank.

  

Common signs of failure:

• Fluid seepage or crystallisation

• Damaged cap seat

• Cracked hose connection

• Slow filling from restricted venting

• Loose or damaged mounting

  

📦 Condition

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 133.86 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 133.86 AUD | In stock |

## Images

- 21840786 Filler Neck | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21840786-filler-neck-genuine-volvo-penta)
> Updated: 2026-08-03