# 21544456 Wiring Harness | Genuine Volvo Penta Part

## 🔧 Product Description

A dedicated engine harness connecting the exhaust overheat sensors to the control and alarm system on selected Volvo Penta V8 marine petrol engines.

## 🚤 Compatibility

-   **Engine Family:** V
-   **HP Range:** 225-320 HP

Full model list at the end of this description.

## ⚙️ Key Features

-   Genuine Volvo Penta exhaust-temperature sensor harness
-   Designed for the high-temperature exhaust-manifold area
-   Factory-sealed marine connectors
-   Correct branch lengths for port and starboard sensors
-   Uses protective caps on sensor leads not required by the engine specification
-   Engine type: V8 electronic-fuel-injected marine petrol

## 🔌 Function

Carries exhaust overheat sensor signals to the engine control module and alarm system.

## ⚠️ Common Signs of Failure

-   False exhaust overheat alarm
-   Overheat warning fails during testing
-   Open- or short-circuit sensor code
-   Heat-damaged wiring near the exhaust manifolds
-   Corroded or loose sensor connectors

## 🛠️ 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

## 🔄 Supersession & Cross Reference

### OEM / Related Numbers

-   21544465 - protective cap for unused sensor leads
-   21544466 - alternate keyed protective cap

## 📦 Condition

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

## 🔎 Full Model Compatibility

Typically suits:

-   Volvo Penta V8-270-CE-B, V8-300-A, V8-300-E-A, V8-300-B, V8-300-E-B, V8-300-CE-A, V8-320-CE-B, V8-300-CE-B, V8-320-A, V8-320-E-A, V8-320-B, V8-320-E-B, V8-320-CE-A, V8-225-CE-A, V8-225-CE-B, V8-270-A, V8-270-E-A, V8-270-B, V8-270-E-B, V8-270-CE-A
-   Volvo Penta 5.7GXi-320-R, 5.7GXiE-320-R, 5.7GXiE-P, 5.7GXi-P, 5.7GiE-300-P, 5.7Gi-300-P, 5.7Gi-300-R, 5.7GiE-300-R, 5.0GXi-270-R, 5.0GXiE-270-R, 5.0GXiE-P, 5.0GXi-P

## Details

- **Price:** 131.07 AUD
- **Vendor:** Volvo Penta
- **Type:** Electrical & Wiring
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 131.07 AUD | In stock |

## Images

- 21544456 Wiring Harness | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21544456-wiring-harness-genuine-volvo-penta)
> Updated: 2026-09-06