# 20429341 Compressor | Genuine Volvo Penta Part

🔧 Product Description

  

Genuine Volvo Penta Knorr LK3986 Engine-Mounted Air Compressor - Part Number: 20429341

  

Genuine Volvo Penta complete Knorr LK3986 engine-driven air compressor for the D12 industrial engine family. It replaces earlier complete compressor 8122459 and is also available as Volvo Penta exchange unit 3803621.

  

⚙️ Key Features

  

• Complete Knorr LK3986 compressor assembly

• Engine-driven compressed-air production

• Water- and oil-connected according to the D12 installation

• Uses drive gear 8170446

• Complete exchange compressor is available

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 20429341 → Replaces 8122459

• 3803621 - Volvo Penta exchange compressor

  

OEM / Related Numbers:

  

• 8170446 - compressor drive gear

• 1075757 - inlet pipe

• 948983 - related O-ring

• 1547252 - related sealing ring

  

Aftermarket / Verified Equivalents:

  

• Knorr-Bremse complete compressor references are unit-build dependent

  

🚤 Compatibility

  

Commonly used on:

  

• Volvo Penta D12 engine-mounted compressed-air systems

  

Typically suits:

  

• Engine / equipment models:

• TWD1240VE

• TAD1241VE

• TAD1242VE

• TAD1250VE

• TAD1251VE

• TAD1252VE

  

• Engine Type: Volvo Penta 12-litre industrial diesel

• Year / Serial Range: Compressor type, drive and engine serial-number dependent

  

🔌 Function

  

Produces compressed air for the vehicle, industrial or auxiliary pneumatic system.

  

Common signs of failure:

  

• Slow or no air-pressure build-up

• Excessive oil carry-over

• Compressor knocking or overheating

• Coolant or air leakage

• Failure to reach cut-out pressure

  

📦 Condition

  

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 2771.22 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 2771.22 AUD | In stock |

## Images

- 20429341 Compressor | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/20429341-compressor-genuine-volvo-penta)
> Updated: 2026-07-29