# 22405370 Wiring Harness | Genuine Volvo Penta Part

## 🔧 Product Description

A genuine Volvo Penta wiring harness used with an expansion-tank and level-sensor installation. The harness is shown with expansion tank 22395120, sensor 21271982 and the related cooling-package components. It provides the correct connector and branch length for carrying the coolant-level signal into the engine or machine electrical system.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta TAD1643VE-B
-   Volvo Penta TAD1640-42GE-B
-   Volvo Penta TAD1640VE-B
-   Volvo Penta TAD1641VE-B
-   Volvo Penta TAD1642VE-B
-   Volvo Penta TAD1641VE
-   Volvo Penta TAD1642VE
-   Volvo Penta TAD1643VE
-   Volvo Penta TAD1650VE
-   Volvo Penta TAD1660-62VE
-   Volvo Penta TAD1662VE EU5
-   Volvo Penta TAD1670-72VE
-   Volvo Penta TAD1640-42VE-C

-   **Engine Family:** TAD

## ⚙️ Key Features

-   OEM harness for the expansion-tank level-sensor circuit
-   Associated with expansion tank 22395120 and sensor 21271982
-   Correct sealed connector and wire length for the original cooling package
-   Engine-bay insulation suited to heat, coolant vapour and vibration
-   Supports reliable coolant-level warning operation
-   Direct-fit connection without cutting or splicing when the application is confirmed

## 🔌 Function

The harness supplies the sensor circuit and carries the coolant-level signal to the monitoring or engine-control system. A reliable connection allows the operator to receive an early warning when coolant level falls.

## ⚠️ Common Signs of Failure

-   False low-coolant warning
-   No warning when the tank level is low
-   Intermittent warning caused by vibration
-   Corroded or coolant-contaminated terminals
-   Broken wires near the connector or retaining clips
-   Harness insulation chafed against the cooling package
-   Open-circuit or short-circuit fault in the level-sensor circuit

## 🛠️ 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

### Aftermarket / Verified Equivalents

-   Related expansion tank: 22395120
-   Related level sensor: 21271982
-   Related expansion tank: 22821822

## 📦 Condition

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

## Details

- **Price:** 70.95 AUD
- **Vendor:** Volvo Penta
- **Type:** Electrical & Wiring
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 70.95 AUD | In stock |

## Images

- 22405370 Wiring Harness | Genuine Volvo Penta Part
- 22405370 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/22405370-wiring-harness-genuine-volvo-penta)
> Updated: 2026-10-10