# 874081 Control Unit | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta control unit for the KAD application, from the Ignition and Control Systems group. It weighs 1.129 kg and is listed for 2 applications across the KAD and KAMD series. It consolidates two earlier numbers, 3803464 and 873964, the latter catalogued earlier as a dataset. The KAD marking is what separates it from control unit 874040, the KAMD unit at 1.161 kg — the two are only 32 grams apart, so identify by the marking and the number, never by feel.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta KAD44P
-   Volvo Penta KAMD44P-A

-   **Engine Family:** KAD, KAMD

## ⚙️ Key Features

-   For the KAD application
-   1.129 kg
-   2 applications across KAD and KAMD engines
-   Supersedes 3803464 and 873964
-   873964 was catalogued earlier as a dataset
-   Also supersedes Volvo part number 873836

## 🔌 Function

Holds the engine's control programme and governs fuelling and protection functions from the sensor inputs.

## ⚠️ Common Signs of Failure

-   Engine failing to start or stopping with no fuel or air fault found
-   Warning lamps lit with no corresponding sensor fault
-   Unprompted drop into reduced power
-   Water marks or corrosion inside the unit's connector
-   Faults that appear only once the unit is warm

## 🛠️ Service Notes

-   Confirm the engine is a KAD before ordering — 874040 is the KAMD unit and they are not interchangeable
-   Check supply, earth and connector condition before condemning the unit

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   874081 → Supersedes 3803464

### OEM / Related Numbers

-   873964 earlier number superseded by this part
-   3803464 earlier number superseded by this part

## 📦 Condition

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

## Details

- **Price:** 6446.99 AUD
- **Vendor:** Volvo Penta
- **Type:** Ignition & Controls
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 6446.99 AUD | In stock |

## Images

- 874081 Control Unit | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/874081-control-unit-genuine-volvo-penta)
> Updated: 2026-09-19