# 22224171 Diode | Genuine Volvo Penta Part

## 🔧 Product Description

Power diode used in a Volvo Penta alternator or electrical-protection circuit. It is associated with earlier diode reference 881956 and has a documented Herth+Buss Elparts replacement.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta TAMD75P-A
-   Volvo Penta TAMD74P-A
-   Volvo Penta TAMD74P-B
-   Volvo Penta TAMD74C-A
-   Volvo Penta TAMD74C-B
-   Volvo Penta TAMD74L-A
-   Volvo Penta TAMD74L-B
-   Volvo Penta KAMD44P-C
-   Volvo Penta KAMD300-A

-   **Engine Family:** TAMD, KAMD

## ⚙️ Key Features

-   One-way current-control device
-   Charging and electrical-protection application
-   Factory current and voltage rating
-   Related earlier diode 881956

## 🔌 Function

Allows current flow in one direction to protect the charging/control circuit from reverse voltage or inductive current.

## ⚠️ Common Signs of Failure

-   Battery not charging correctly
-   Repeated fuse failure
-   Reverse-current drain
-   Open-circuit or short-circuit diode test
-   Overheated terminals

## 🛠️ Service Notes

-   Isolate the batteries before working on the circuit and note which way round the diode is connected — a diode passes current one way only, and fitting it reversed will either stop the circuit working or leave something live that should not be
-   Refit it in the original position with the same mounting and insulation, keeping any heat-shedding contact the original had
-   Make the connections cleanly and keep the body cool while soldering or crimping, then protect the joint against damp as the original was protected
-   Test a suspect diode out of circuit rather than in it, and look for why it failed — a diode usually goes because of a surge, a short or a charging fault elsewhere

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   881956 (earlier diode reference)

### OEM / Related Numbers

-   881956 related reference
-   Herth+Buss Elparts 50292007

## 📦 Condition

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

## Details

- **Price:** 46.88 AUD
- **Vendor:** Volvo Penta
- **Type:** Charging & Alternators
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 46.88 AUD | In stock |

## Images

- 22224171 Diode | Genuine Volvo Penta Part
- 22224171 Diode | Genuine Volvo Penta Part - photo 2 of 2

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/22224171-diode-genuine-volvo-penta)
> Updated: 2026-09-19