# 21586874 Wiring Harness | Genuine Volvo Penta Part

## 🔧 Product Description

Factory wiring harness for Volvo Penta D4 and D6 diesel installations using the specified drive/EVC configuration. The loom retains the original connectors, branch geometry and circuit allocation needed for reliable power and signal transfer.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta D6-330D-E
-   Volvo Penta D6-370D-E
-   Volvo Penta D4-260D-E
-   Volvo Penta D4-260D-F
-   Volvo Penta D4-300D-E
-   Volvo Penta D4-300D-F
-   Volvo Penta D6-330D-F
-   Volvo Penta D6-370D-F
-   Volvo Penta D6-300D-F
-   Volvo Penta D6-310D-E
-   Volvo Penta 8.1IPSCE-Q
-   Volvo Penta D6-435D-E
-   Volvo Penta D6-435D-F
-   Volvo Penta IPS-F

-   **Engine Family:** D, IPS
-   **HP Range:** 260-435 HP

## ⚙️ Key Features

-   Genuine Volvo Penta D4/D6 wiring harness
-   OEM connector keying and terminal arrangement
-   Correct branch lengths for the listed D4 and D6 configurations
-   Supports EVC, sensor and actuator circuits
-   Direct replacement only where part number 21586874 is specified
-   Engine type: Volvo Penta D4 and D6 electronically controlled diesel marine engines

## 🔌 Function

Links the specified D4/D6 engine and drive-control components to the original EVC power, sensor and communication circuits.

## ⚠️ Common Signs of Failure

-   EVC alarms or intermittent communication
-   No power at a connected sensor, actuator or module
-   Intermittent starting, shift or throttle response
-   Corrosion, fretting or heat damage at terminals
-   Continuity faults caused by chafed or broken conductors

## 🛠️ Service Notes

-   Compare the new harness with the old one before fitting — check the connector types, the number of pins and the branch lengths, and lay it out alongside the old loom to confirm every branch reaches its component
-   Disconnect the batteries before unplugging or fitting a harness, and support the loom as you work so its weight never hangs on a connector or a bulkhead grommet
-   Route it along the original path and secure it with the original clips and ties, clear of hot exhaust surfaces, sharp edges and anything that moves; leave a service loop at each connector rather than pulling a branch tight
-   Push every connector home until the lock latches and protect the joints with a marine dielectric grease — an intermittent electrical fault is far more often a partly seated or salt-corroded pin than a broken wire
-   Renewing the harness is the right repair where insulation is chafed, brittle or oil-soaked, or where corrosion has tracked inside the connector bodies; patch repairs in a damp engine bay tend to fail again, and any single conductor that is repaired should be joined with tinned marine cable of the same gauge, a proper crimp and adhesive-lined heat-shrink

## 📦 Condition

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

## Details

- **Price:** 735.68 AUD
- **Vendor:** Volvo Penta
- **Type:** Electrical & Wiring
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 735.68 AUD | In stock |

## Images

- 21586874 Wiring Harness | Genuine Volvo Penta Part
- 21586874 Wiring Harness | Genuine Volvo Penta Part - photo 2 of 2

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21586874-wiring-harness-genuine-volvo-penta)
> Updated: 2026-09-21