# 21250645 Pressure Switch | Genuine Volvo Penta Part

🔧 Product Description

  

Genuine Volvo Penta Engine Oil Pressure Switch - Part Number: 21250645

  

Genuine oil-pressure warning switch used on Volvo Penta D1 and D2 marine diesel engines. It monitors lubricating-oil pressure and signals the alarm or monitoring system if pressure falls below the switch threshold.

  

⚙️ Key Features

  

• Genuine Volvo Penta oil-pressure switch

• Replaces earlier references 3808796 and 3847889

• Direct connection to the engine alarm system

• Threaded engine-block installation

• Suitable for compact marine diesel engines

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 21250645 → Supersedes 3847889

• 3847889 → Supersedes 3808796

  

OEM / Related Numbers:

  

• 21250645

• 3847889

• 3808796

  

Aftermarket / Verified Equivalents:

  

• Parts4Engines: Oil Pressure Switch equivalent

• FridayParts: Replacement switch for 21250645

  

🚤 Compatibility

  

Confirmed engines:

  

• D1-13A

• D1-13B

• D1-13F

• D1-20A

• D1-20B

• D1-20F

• D1-30A

• D1-30B

• D1-30F

• D2-40A

• D2-40B

• D2-40F

• D2-50F

• D2-55A

• D2-55B

• D2-55C

• D2-55D

• D2-55E

• D2-55F

• D2-60F

• D2-75A

• D2-75B

• D2-75C

• D2-75F

  

🔌 Function

  

The switch closes or opens its electrical circuit in response to engine-oil pressure, allowing the monitoring system to activate a low-oil-pressure warning.

  

Common signs of failure:

  

• False low-oil-pressure alarm

• No warning when the engine is stopped

• Intermittent alarm or warning lamp

• Oil leaking through the switch body

• Corroded electrical terminal

• Incorrect switch resistance or continuity

  

📦 Condition

  

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 194.34 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 194.34 AUD | In stock |

## Images

- 21250645 Pressure Switch | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21250645-pressure-switch-genuine-volvo-penta)
> Updated: 2026-08-02