# 20939275 O-Ring | Genuine Volvo Penta Part

🔧 Product Description

  

Genuine Volvo Penta Fuel-System O-Ring - Part Number: 20939275

  

OEM sealing component used in the common-rail low-pressure fuel supply and return assembly. It restores the intended fluid-, air- or gas-tight interface when the adjoining parts are serviced.

  

⚙️ Key Features

  

• Manufactured to the original Volvo Penta dimensional and material specification

• Maintains correct fit, alignment and service access

• Designed for diesel-engine heat, vibration and operating load

• Direct replacement for a worn, damaged or missing original component

• Must be matched by part number, engine product and serial/configuration

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 20939275 (OEM catalogue reference)

  

OEM / Related Numbers:

  

• Fuel filter, transfer pump, fuel rail, return line, sealing rings and hose/pipe fittings

  

Aftermarket / Verified Equivalents:

  

• No aftermarket equivalent

  

🚤 Compatibility

  

Commonly used on:

  

• Common-rail low-pressure fuel supply and return assembly

  

Typically suits:

  

• Engine models:

• TAD550GE; TAD551GE; TAD560VE; TAD650VE; TAD660VE; TAD734GE; TAD750GE; TAD750VE; TAD751GE; TAD752GE; TAD753GE; TAD754GE; TAD760VE; TAD761VE

• HP Range: Approximately 170-320 HP, depending on engine rating

• Engine Type: Four- and six-cylinder common-rail diesel

• Year Range: Approximately 2000s-2010s

  

🔌 Function

  

Prevents leakage and contamination at the designated joint while maintaining the required separation between operating fluids or gases.

  

Common signs of failure:

  

• Oil, coolant, fuel, air or gas leakage at the joint

• Hardening, flattening, tearing or compression set

• Wetness, staining or residue around mating surfaces

• Loss of system pressure or contamination entry

• Leakage returning after reuse or incorrect installation

  

📦 Condition

  

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 4.42 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 4.42 AUD | In stock |

## Images

- 20939275 O-Ring | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/20939275-o-ring-genuine-volvo-penta)
> Updated: 2026-08-01