# 21492847 Relay Bracket | Genuine Volvo Penta Part

## 🔧 Product Description

A mounting bracket used to support relay sockets, relays and associated electrical-distribution hardware on Volvo Penta D4 and D6 engines.

## 🚤 Compatibility

-   **Engine Family:** D
-   **HP Range:** 145-480 HP

Full model list at the end of this description.

## ⚙️ Key Features

-   Supports relay and fuse equipment
-   Maintains wiring and connector alignment
-   Reduces electrical-component vibration
-   Correct D4 and D6 engine mounting profile
-   Designed for the matching relay box and sockets
-   Quantity varies by assembly, most commonly one

## 🔌 Function

The bracket secures the relays and sockets so electrical contacts remain stable under engine vibration.

## ⚠️ Common Signs of Failure

-   Relay box moving or rattling
-   Loose relay sockets
-   Intermittent faults caused by component movement

## 🛠️ Service Notes

-   At 18 grams this is a light stamped bracket rather than a substantial mounting plate — check it for cracking or elongated holes rather than expecting it to bend, since thin steel like this fails by fatigue cracking, not gradual distortion
-   It carries relay box 21494263, so if the box or its relays have been vibrating loose, check this bracket's fixings and the panel it mounts to at the same time

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   21492847 → Supersedes 21392273 → Supersedes 3587174

### OEM / Related Numbers

-   21392273 earlier number superseded by this part
-   3587174 earlier number superseded by this part
-   3587172 - Relay socket
-   21400091 - Relays
-   3171420 - Relays
-   21494263 - Relay box
-   23559411 - Related wiring harnesses
-   23748284 - Related wiring harnesses
-   21426987 - Speed monitor

## 📦 Condition

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

## 🔎 Full Model Compatibility

Typically suits:

-   Volvo Penta D6-340I-G, D6-380I-G, D6-440I-G, D6-480I-G, D6-300A-G, D6-340A-G, D6-380A-G, D6-440I-WJ-G, D6-480I-WJ-G, D6-300D-G, D6-340D-G, D6-380D-G, D6-440D-G, D6-480D-G, D6-400A-G, D6-440A-G, D6-300I-G
-   Volvo Penta D13C3-B MH, D13C1-B MH, D13C4-B MH, D13C4-B MP, D13C5-B MP, D13C1-A MH, D13C2-A MH, D13C3-B MG, D13C4-B MG, D13C5-A MP, D13C2-A MG, D13C1-A MG, D13C7-B MP, D13C8-B MP
-   Volvo Penta D4-175I-G, D4-230I-G, D4-270I-G, D4-320I-G, D4-300I-G, D4-150A-G, D4-230A-G, D4-270A-G, D4-320A-G, D4-300A-G, D4-145I-G
-   Volvo Penta D16C1-E MG, D16C1-F MG, D16C2-E MG, D16C2-F MG, D16C1-E MH, D16C1-F MH, D16C2-E MH, D16C2-F MH
-   Volvo Penta D8A6-A MH, D8A6-A MG, D8A7-A MP, D8A8-A MP
-   Volvo Penta D11B2-A MP, D11B1-A MP

## Details

- **Price:** 6.86 AUD
- **Vendor:** Volvo Penta
- **Type:** Brackets & Mounts
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 6.86 AUD | In stock |

## Images

- 21492847 Relay Bracket | Genuine Volvo Penta Part
- 21492847 Relay Bracket | Genuine Volvo Penta Part - photo 2 of 2

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21492847-relay-bracket-genuine-volvo-penta)
> Updated: 2026-09-19