Position Sensor – Fits Volvo Penta SX/DP-S/DP-SM (Replaces 3858212, 21652399)
Position Sensor – Fits Volvo Penta SX/DP-S/DP-SM (Replaces 3858212, 21652399) is backordered and will ship as soon as it is back in stock.
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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.).
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Position Sensor – Fits Volvo Penta SX/DP-S/DP-SM (Replaces 3858212,...
Product Details
This is a direct-replacement Position Sensor – Fits Volvo Penta SX/DP-S/DP-SM drives (2001 and later). It serves as an electronic trim position sensor for power trim systems, ensuring accurate readings of your sterndrive's trim angle.
It directly replaces Volvo Penta part numbers 3858212 and 21652399.
- Installs as a direct OEM-level replacement.
- Features a standard 3-pin electrical connector for plug-and-play setup.
- Utilizes a digital sensor for precise trim position feedback.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Superseded By |
|---|---|---|
| Volvo Penta | 3858212 | 21652399 |
| Volvo Penta | 21652399 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This sensor is designed for Volvo Penta SX, DP-S, and DP-SM sterndrive models manufactured in 2001 or later.
| Brand | Model | Years | OEM Part No. | Notes |
|---|---|---|---|---|
| Volvo Penta | SX | 2001–later | 3858212/21652399 | Part number 3858212 has been superseded by 21652399 |
| Volvo Penta | DP-S | 2001–later | 3858212/21652399 | Part number 3858212 has been superseded by 21652399 |
| Volvo Penta | DP-SM | 2001–later | 3858212/21652399 | Part number 3858212 has been superseded by 21652399 |
Technical Specs
- Product Type
- Trim Position Sensor
- Installation
- Direct OEM replacement
- Connection
- 3-pin electrical connector
- Housing Color
- Black
- Dimensions
- 7.5" (H) x 9.5" (W) x 14.5" (L)
- Fitting Type
- Direct mounting
- Warranty
- Standard OEM or aftermarket warranty
- Other Technical Attributes
- Digital sensor for accurate trim position readings
What’s in the Box
- 1 x Position Sensor (3858212/21652399)
Installation Notes
- Disconnect the vessel's battery before starting any electrical work.
- Locate the existing trim position sensor on the sterndrive unit.
- Carefully disconnect the 3-pin electrical connector.
- Remove the mounting screws or bolts securing the old sensor and remove it.
- Clean the mounting surface to ensure a proper seal and fit.
- Position the new sensor and secure it with the original hardware.
- Reconnect the electrical connector firmly.
- Reconnect the battery, turn on the ignition, and test the trim gauge and system for correct operation.
Troubleshooting & FAQ
How do I know if my trim position sensor has failed?
Common signs include an inaccurate or non-functioning trim gauge, erratic trim system behavior where the pump runs unexpectedly, or fault codes related to the trim position circuit on your diagnostic system.
Is this a digital or analog sensor?
This is a modern digital sensor, which provides more accurate and reliable position data to your gauge and engine control unit compared to older analog models.
Will this fit sterndrive models older than 2001?
No, this sensor is specifically designed for the electrical systems and mounting points on Volvo Penta SX, DP-S, and DP-SM drives manufactured from 2001 onward. Always verify your part number before ordering.
What is the difference between part number 3858212 and 21652399?
Part number 21652399 is the official supersession for 3858212, meaning it is the current replacement part offered by the manufacturer. They are functionally identical and fully interchangeable.
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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