# 3801780 Control Unit Exch | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta remanufactured control unit from the Ignition and Control Systems group. It supersedes part number 3801779. The published weight is zero, which is a listing error rather than a real figure, so it is no help in identifying the unit and the part number is what to order by. This unit is supplied on an exchange basis: core deposit 3804780 is charged alongside it and refunded once the old unit is returned, so both numbers appear on the order.

## ⚙️ Key Features

-   Supersedes 3801779
-   Remanufactured control unit
-   From the Ignition and Control Systems group
-   Published weight is zero and cannot be relied on

## 🔌 Function

Reads the engine sensors and governs fuelling, timing and the protection functions that shut the engine down before damage occurs.

## ⚠️ Common Signs of Failure

-   Warning lamps or fault codes with no matching mechanical fault
-   Engine derating, or refusing to start at all
-   Instruments and gauges dropping out intermittently
-   Corrosion or green deposits around the connector pins
-   Communication faults between the engine and the helm display

## 🛠️ Service Notes

-   If your records show 3801779, this is the current replacement
-   Control units usually need programming to the engine and boat before they will run, so tell us the engine serial number when you order
-   Check the harness, earths and connector pins before condemning a control unit — damp connectors cause most of these faults
-   Core deposit 3804780 is charged with this unit and refunded when the old one is returned - order both together

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   3801780 → Supersedes 3801779

### OEM / Related Numbers

-   3801779 earlier number superseded by this part

## 📦 Condition

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

## Details

- **Price:** 6711.91 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 6711.91 AUD | In stock |

## Images

- 3801780 Control Unit Exch | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/3801780-control-unit-exch-genuine-volvo-penta)
> Updated: 2026-08-22