# 3858596 Extension Kit | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta extension kit from the Marine Propulsion group, weighing 2.258 kg and listed for 2 applications across the DPX and HS series. It supersedes part number 3851712, which was catalogued under its Swedish name for the same extension kit.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta DPX-R
-   Volvo Penta HS1A

-   **Engine Family:** DPX, HS

## ⚙️ Key Features

-   2.258 kg
-   Listed for 2 applications across the DPX and HS series
-   Supersedes 3851712
-   Supplied as a kit

## 🔌 Function

Extends the reach of the assembly it fits, supplying the extension parts as a matched set so the geometry and fixings stay correct.

## ⚠️ Common Signs of Failure

-   Assembly not reaching or lining up as it should
-   Fixings slack, backed out or missing
-   Extension parts bent, twisted or fretted at the joints
-   Corrosion at the joint faces
-   Play or knock developing where the extension joins

## 🛠️ Service Notes

-   Only two applications are listed, so confirm the installation before ordering
-   Check the contents against the job before starting - the kit is supplied as a set and should be fitted as one

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   3858596 → Supersedes 3851712 → Supersedes 873345

### OEM / Related Numbers

-   3851712 earlier number superseded by this part
-   873345 earlier number superseded by this part

## 📦 Condition

-   Genuine Volvo Penta part
-   Brand new
-   Supplied in original or equivalent packaging

## Details

- **Price:** 2138.54 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 2138.54 AUD | In stock |

## Images

- 3858596 Extension Kit | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/3858596-extension-kit-genuine-volvo-penta)
> Updated: 2026-08-22