Volvo Penta Oil Pressure Switch 21250645 – Fits Volvo Penta Marine Diesel Engines
Volvo Penta Oil Pressure Switch 21250645 – Fits Volvo Penta Marine Diesel Engines is backordered and will ship as soon as it is back in stock.
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Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Volvo Penta Oil Pressure Switch 21250645 – Fits Volvo Penta Marine ...
Product Details
This is a direct-fit Volvo Penta Oil Pressure Switch 21250645, designed for reliable performance in Volvo Penta D1 and D2 series marine diesel engines. It is compatible with models including the D1-13, D1-20, D1-30, D2-40, D2-55, D2-60, and D2-75.
This switch is a direct replacement for Volvo Penta part numbers 21250645 and 3808796.
- Installs as a direct OEM-style replacement.
- Engineered for marine diesel fuel environments.
- Features a standard 3-wire electrical connection.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Superseded By |
|---|---|---|
| Volvo Penta | 3808796 | 21250645 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This part is designed for specific Volvo Penta engines.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| Volvo Penta | D1-13 | 13 | 4-Stroke | 21250645 | |
| Volvo Penta | D1-13B | 13 | 4-Stroke | 21250645 | |
| Volvo Penta | D1-13F | 13 | 4-Stroke | 21250645 | |
| Volvo Penta | D1-20 | 20 | 4-Stroke | 21250645 | |
| Volvo Penta | D1-20B | 20 | 4-Stroke | 21250645 | |
| Volvo Penta | D1-20F | 20 | 4-Stroke | 21250645 | |
| Volvo Penta | D1-30 | 30 | 4-Stroke | 21250645 | |
| Volvo Penta | D1-30B | 30 | 4-Stroke | 21250645 | |
| Volvo Penta | D1-30F | 30 | 4-Stroke | 21250645 | |
| Volvo Penta | D2-40B | 40 | 4-Stroke | 21250645 | |
| Volvo Penta | D2-40F | 40 | 4-Stroke | 21250645 | |
| Volvo Penta | D2-50F | 50 | 4-Stroke | 21250645 | |
| Volvo Penta | D2-55 | 55 | 4-Stroke | 21250645 | |
| Volvo Penta | D2-55B | 55 | 4-Stroke | 21250645 | |
| Volvo Penta | D2-55C | 55 | 4-Stroke | 21250645 | |
| Volvo Penta | D2-55D | 55 | 4-Stroke | 21250645 | |
| Volvo Penta | D2-55E | 55 | 4-Stroke | 21250645 | |
| Volvo Penta | D2-55F | 55 | 4-Stroke | 21250645 | |
| Volvo Penta | D2-60F | 60 | 4-Stroke | 21250645 | |
| Volvo Penta | D2-75 | 75 | 4-Stroke | 21250645 | |
| Volvo Penta | D2-75B | 75 | 4-Stroke | 21250645 | |
| Volvo Penta | D2-75C | 75 | 4-Stroke | 21250645 | |
| Volvo Penta | D2-75F | 75 | 4-Stroke | 21250645 |
Technical Specs
- Product Type
- Oil Pressure Switch
- Installation
- Direct OEM replacement
- Fuel Type
- Diesel
- Connection
- Electrical: 3-wire
- Dimensions
- 3.6" L x 6.5" W x 3.1" H
- Other Technical Attributes
- Pressure monitor for engine oil system
What’s in the Box
- 1 x Pressure Switch (21250645)
Installation Notes
- Disconnect the vessel's battery before starting work.
- Locate and identify the old oil pressure switch on the engine block.
- Carefully disconnect the electrical connector from the switch.
- Using an appropriate wrench, unscrew and remove the old switch. Have a rag ready to catch any minor oil drips.
- Thread the new switch in by hand to avoid cross-threading, then tighten securely with a wrench. Do not overtighten.
- Reconnect the electrical connector firmly.
- Reconnect the battery, start the engine, and check the instrument panel to ensure the oil pressure gauge/light is functioning correctly. Visually inspect for any leaks around the new switch.
Troubleshooting & FAQ
How do I know if this oil pressure switch fits my engine?
This switch is designed for Volvo Penta D1 and D2 series diesel engines. Please review the 'Engine & Model Compatibility' table and compare the part number 21250645 to your engine's service manual to ensure an exact match.
What are the common signs of a failing oil pressure switch?
Symptoms of a faulty switch include an oil pressure warning light that stays on or flickers, a gauge that reads zero or provides erratic readings, or a gauge that reads normal even when oil pressure is critically low. Failure can lead to inaccurate engine monitoring.
What is the main difference between this part and an OEM part?
Our aftermarket switch is engineered to meet or exceed original equipment manufacturer (OEM) specifications for fit, form, and function. While not an OEM part, it offers a high-quality, cost-effective alternative without sacrificing performance or reliability.
Is any special calibration required during installation?
No, this switch is a direct-fit replacement and does not require any special tools or calibration. It is designed to operate within the engine's factory parameters right out of the box.
How often should an oil pressure switch be replaced?
There is no fixed replacement interval for oil pressure switches. They are typically replaced only when they fail. If you are performing a major engine overhaul, it can be a good preventative measure to replace it at the same time.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost?
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns?
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
Payment & Security
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