# 20409321 Wiring Harness | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta wiring harness connecting the fuel-filter housing pressure sensor to the engine electrical system. It is confirmed with pressure sensor 20484678 in TAD940GE and TAD941GE fuel-filter assemblies and is shared with Volvo heavy-equipment fuel systems.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta TAD943VE
-   Volvo Penta TAD952VE
-   Volvo Penta TAD951VE
-   Volvo Penta TAD950VE
-   Volvo Penta TAD940GE
-   Volvo Penta TAD940VE
-   Volvo Penta TAD941VE
-   Volvo Penta TAD941GE
-   Volvo Penta TAD942VE

-   **Engine Family:** TAD

## ⚙️ Key Features

-   Dedicated short harness for the fuel-filter pressure sensor
-   Connects pressure sensor 20484678 to the engine harness
-   Used with fuel-filter housing 20464376 / later 21032642
-   Confirmed in Volvo D9 and D12 fuel-filter assemblies
-   Connector seals and terminal locking must remain intact
-   Engine type: Volvo 9- and 12-litre electronic diesel fuel systems

## 🔌 Function

Carries the electrical signal from the fuel-filter pressure sensor to the engine control and warning system.

## ⚠️ Common Signs of Failure

-   Fuel-filter pressure fault or warning
-   Intermittent sensor reading
-   Broken or corroded connector terminals
-   Harness insulation damage
-   Open circuit or short circuit near the filter housing

## 🛠️ 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

-   20484678 - fuel-filter pressure sensor
-   20464376 → replaced by 21032642 - fuel-filter housing
-   20430751 - related fuel filters
-   20998367 - related fuel filters
-   3169582 - related fuel pump

## 📦 Condition

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

## Details

- **Price:** 134.38 AUD
- **Vendor:** Volvo Penta
- **Type:** Electrical & Wiring
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 134.38 AUD | In stock |

## Images

- 20409321 Wiring Harness | Genuine Volvo Penta Part
- 20409321 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/20409321-wiring-harness-genuine-volvo-penta)
> Updated: 2026-10-10