# 21243814 Companion Flange | Genuine Volvo Penta Part

🔧 Product Description

  

Genuine Volvo Penta D12 Crankshaft Companion Flange - Part Number: 21243814

  

A crankshaft or timing-gear companion flange used on selected D12, TAD12 and TWD12 engines. It is also required when converting from timing cover 3835799 to the later cover arrangement.

  

⚙️ Key Features

  

• Genuine Volvo Penta component

• Precision-machined crankshaft interface

• Required with the specified timing-cover conversion

• Transfers drive or locates front timing components

• Direct replacement where part number 21243814 is specified

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 21243814 (current catalogued companion flange)

  

OEM / Related Numbers:

  

• Timing-cover conversion contents: 1 × 21122283 Timing Gear Cover

• 1 × 21243814 Companion Flange

• 2 × 3595265 Screw

• 3835799 - earlier timing cover

  

Aftermarket / Verified Equivalents:

  

• No aftermarket equivalent

  

🚤 Compatibility

  

Commonly used on:

  

• Volvo Penta D12, TAD12 and TWD12 crankshaft and timing-gear systems

  

Typically suits:

  

• Engine models:

• D12C-A

• D12D-A/C/D/E

• TAD1240VE

• TAD1241VE

• TAD1242VE

• TAD1250VE

• TAD1251VE

• TAD1252VE

• TWD1240VE

  

• HP Range: Engine-rating dependent

• Engine Type: 12-litre inline-six turbocharged diesel

• Year Range: Timing-cover and serial-number dependent

  

🔌 Function

  

Locates and connects the crankshaft to the associated front timing or drive components.

  

Common signs of failure:

  

• Fretting or movement at the crankshaft interface

• Cracks or damaged keying

• Oil leakage from the timing-cover area

• Pulley or drive misalignment

• Abnormal front-engine vibration

  

📦 Condition

  

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 2089.74 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 2089.74 AUD | In stock |

## Images

- 21243814 Companion Flange | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21243814-companion-flange-genuine-volvo-penta)
> Updated: 2026-08-02