# 21271237 Wiring Harness | Genuine Volvo Penta Part

🔧 Product Description

  

Genuine Volvo Penta D4 / D6 Engine-Side Wiring Harness - Part Number: 21271237

  

Genuine Volvo Penta engine wiring harness used on a serial-controlled D4 or D6 marine diesel electrical installation. It provides the factory connector branches, protective sleeving and circuit routing between the engine control system, sensors, actuators and power components.

  

⚙️ Key Features

  

• Genuine Volvo Penta engine-side harness

• Used in specified D4/D6 marine electrical systems

• OEM connector coding and branch lengths

• Marine abrasion and heat protection

• Match EVC generation, voltage and engine serial before ordering

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 21271237 (current listed OEM reference)

  

OEM / Related Numbers:

  

• 21271237 - current OEM reference

  

Aftermarket / Verified Equivalents:

  

• No aftermarket equivalent

  

🚤 Compatibility

  

Commonly used on:

  

• Volvo Penta D4 and D6 common-rail marine-engine electrical systems

  

Typically suits:

  

• Engine models:

• D4 or D6 engine product number whose electrical schematic lists wiring harness 21271237

  

• Serial / Specification Control: Exact D4/D6 model, EVC generation, system voltage, connector revision and engine serial number must match.

• HP Range: D4/D6 rating dependent

• Engine Type: Volvo Penta D4 inline-four or D6 inline-six common-rail marine diesel

• Year Range: Harness and EVC revision controlled

  

🔌 Function

  

Carries power, ground and control signals between the ECU, engine sensors, actuators, charging circuit and starting system.

  

Common signs of failure:

  

• Intermittent operation or faults that change when the harness is moved

• Open-circuit, short-circuit or communication diagnostic codes

• Corroded, loose or heat-damaged terminals

• Chafed insulation, broken conductors or water entry

• Several related sensors or actuators failing together

  

📦 Condition

  

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 703.6 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 703.60 AUD | In stock |

## Images

- 21271237 Wiring Harness | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21271237-wiring-harness-genuine-volvo-penta)
> Updated: 2026-08-02