# 3886310 Wiring Harness | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta wiring harness from the Cables and Fuses group, weighing 2.268 kg and listed for 5 applications across the D series. It supersedes part number 3840337. It is one of four D-series harnesses here that each replace a 38403xx number, with 3883799 replacing 3840339, 3883808 replacing 3840343 and 3887714 replacing 3840341, and all four fall between 2.191 kg and 2.563 kg, so the superseded number identifies yours.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta D4-260A-B
-   Volvo Penta D4-260A-A
-   Volvo Penta D4-260D-B
-   Volvo Penta D4-300A-A
-   Volvo Penta D4-300D-A

-   **Engine Family:** D
-   **HP Range:** 260-300 HP

## ⚙️ Key Features

-   2.268 kg
-   Supersedes 3840337
-   5 applications across the D series
-   One of four D-series harnesses here that replace a 38403xx number

## 🔌 Function

Carries power and signals between the engine, its sensors and the control system as a single pre-terminated loom.

## ⚠️ Common Signs of Failure

-   Intermittent faults that appear with vibration or when the loom is moved
-   Sensor signals dropping out or reading out of range
-   Insulation chafed or melted where the loom passes a hot or moving part
-   Corrosion inside the connectors
-   Engine cutting out, derating or failing to crank

## 🛠️ Service Notes

-   Check which earlier number your harness replaced: 3840337 for this one, 3840339 for 3883799, 3840343 for 3883808 and 3840341 for 3887714
-   Isolate the batteries before disconnecting the loom, and support it at every original clip so it cannot chafe

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   3886310 → Supersedes 3840337

### OEM / Related Numbers

-   3840337 earlier number superseded by this part

## 📦 Condition

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

## Details

- **Price:** 2028.74 AUD
- **Vendor:** Volvo Penta
- **Type:** Electrical & Wiring
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 2028.74 AUD | In stock |

## Images

- 3886310 Wiring Harness | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/3886310-wiring-harness-genuine-volvo-penta)
> Updated: 2026-09-06