# 21245957 Crankshaft | Genuine Volvo Penta Part

🔧 Product Description

  

Genuine Volvo Penta D7/TAD7 Crankshaft - Part Number: 21245957

  

A complete precision-forged crankshaft used in later-production Volvo Penta D7, TAD7 and TD7 diesel engines. It supersedes multiple earlier crankshaft references through documented engine serial breaks.

  

⚙️ Key Features

  

• Genuine Volvo Penta component

• Precision-ground main and connecting-rod journals

• Later service replacement in a multi-stage supersession chain

• Supports standard and undersize service bearings

• Direct replacement where part number 21245957 is specified

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 21245957 → Supersedes 20790461 → Supersedes 20724015 → Supersedes 20412323

  

OEM / Related Numbers:

  

• 21141948 - standard main bearing

• 21234191 - 0.25 mm undersize main bearing

• 20405541 - 0.50 mm undersize main bearing

• 20405899 - thrust-bearing kit

  

Aftermarket / Verified Equivalents:

  

• No fully documented direct aftermarket equivalent

  

🚤 Compatibility

  

Commonly used on:

  

• Volvo Penta D7, TAD7 and TD7 industrial or marine diesel engines

  

Typically suits:

  

• Engine models:

• D7A-B TA

• D7A-T

• D7A-TA

• D7C-B TA

• D7C-TA

• TAD520VE

• TAD720GE

• TAD720VE

• TAD721GE

• TAD721VE

• TAD722GE

• TAD722VE

• TAD730GE

• TAD731GE

• TAD732GE

• TAD733GE

• TAD750GE

• TAD750VE

• TAD751GE

• TAD760VE

• TD720GE

• TD720VE

  

• HP Range: Engine-rating dependent

• Engine Type: Six-cylinder turbocharged diesel

• Year Range: Later production with individual serial transitions

  

🔌 Function

  

Converts piston movement into rotational power and transmits engine torque to the flywheel.

  

Common signs of failure:

  

• Deep crankcase knock

• Low oil pressure

• Cracked or scored journals

• Excessive crankshaft end float

• Repeated main or connecting-rod bearing failure

• Abnormal engine vibration

  

📦 Condition

  

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 10579.42 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 10579.42 AUD | In stock |

## Images

- 21245957 Crankshaft | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21245957-crankshaft-genuine-volvo-penta)
> Updated: 2026-08-02