Camshaft Position Sensor – Fits Volvo Penta 8.1L Series (Replaces 3859082, 3861323)
Camshaft Position Sensor – Fits Volvo Penta 8.1L Series (Replaces 3859082, 3861323) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Camshaft Position Sensor – Fits Volvo Penta 8.1L Series (Replaces 3...
Product Details
This aftermarket Camshaft Position Sensor is a direct-fit replacement for Volvo Penta 8.1L series engines, including the 8.1Gi, 8.1GSi, 8.1GXi, and 8.1OSi models manufactured between 2001–2007. It provides critical engine timing data to the ECU, ensuring proper performance and fuel efficiency.
It interchanges with Volvo Penta 3859082 and 3861323, Sierra 18-7643, Mallory 9-29822, and CDI E13-0005.
- Installs directly onto the engine block.
- Features solid brass contacts to reduce corrosion-related failures.
- Engineered for use in gasoline marine engines.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Volvo Penta | 3859082 |
| Volvo Penta | 3861323 |
| Sierra | 18-7643 |
| Mallory | 9-29822 |
| CDI Electronics | E13-0005 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Volvo Penta engines, verify your model and serial number to ensure correct fitment. This part is compatible with models up to serial number 4012110799.
| Brand | Model | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Volvo Penta | 8.1Gi-A | 4-Stroke | 2001–2007 | 3859082/3861323 | Up to S/N 4012110799 |
| Volvo Penta | 8.1Gi-B | 4-Stroke | 2001–2007 | 3859082/3861323 | Up to S/N 4012110799 |
| Volvo Penta | 8.1Gi-BF | 4-Stroke | 2001–2007 | 3859082/3861323 | Up to S/N 4012110799 |
| Volvo Penta | 8.1Gi-C | 4-Stroke | 2001–2007 | 3859082/3861323 | Up to S/N 4012110799 |
| Volvo Penta | 8.1Gi-CF | 4-Stroke | 2001–2007 | 3859082/3861323 | Up to S/N 4012110799 |
| Volvo Penta | 8.1Gi-D | 4-Stroke | 2001–2007 | 3859082/3861323 | Up to S/N 4012110799 |
| Volvo Penta | 8.1Gi-DF | 4-Stroke | 2001–2007 | 3859082/3861323 | Up to S/N 4012110799 |
| Volvo Penta | 8.1Gi-E | 4-Stroke | 2001–2007 | 3859082/3861323 | Up to S/N 4012110799 |
| Volvo Penta | 8.1Gi-EF | 4-Stroke | 2001–2007 | 3859082/3861323 | Up to S/N 4012110799 |
| Volvo Penta | 8.1GiI-E | 4-Stroke | 2001–2007 | 3859082/3861323 | Up to S/N 4012110799 |
| Volvo Penta | 8.1GSi-A | 4-Stroke | 2001–2007 | 3859082/3861323 | Up to S/N 4012110799 |
| Volvo Penta | 8.1GXi-A | 4-Stroke | 2001–2007 | 3859082/3861323 | Up to S/N 4012110799 |
| Volvo Penta | 8.1GXi-AF | 4-Stroke | 2001–2007 | 3859082/3861323 | Up to S/N 4012110799 |
| Volvo Penta | 8.1GXi-B | 4-Stroke | 2001–2007 | 3859082/3861323 | Up to S/N 4012110799 |
| Volvo Penta | 8.1GXi-BF | 4-Stroke | 2001–2007 | 3859082/3861323 | Up to S/N 4012110799 |
| Volvo Penta | 8.1GXi-C | 4-Stroke | 2001–2007 | 3859082/3861323 | Up to S/N 4012110799 |
| Volvo Penta | 8.1GXi-D | 4-Stroke | 2001–2007 | 3859082/3861323 | Up to S/N 4012110799 |
| Volvo Penta | 8.1GXi-DF | 4-Stroke | 2001–2007 | 3859082/3861323 | Up to S/N 4012110799 |
| Volvo Penta | 8.1GXiI-D | 4-Stroke | 2001–2007 | 3859082/3861323 | Up to S/N 4012110799 |
| Volvo Penta | 8.1OSi-A | 4-Stroke | 2001–2007 | 3859082/3861323 | Up to S/N 4012110799 |
| Volvo Penta | 8.1OSi-AF | 4-Stroke | 2001–2007 | 3859082/3861323 | Up to S/N 4012110799 |
Technical Specs
- Product Type
- Camshaft Position Sensor
- Installation
- Engine Block Mount
- Fuel Type
- Gasoline
- Connection
- 3-pin Electrical Connector
- Housing Material
- Plastic with Brass Contacts
- Housing Color
- Black
- Dimensions
- Height: 21.3 mm, Width: 37.5 mm, Length: 17.5 mm
- Weight
- 0.07 kg (0.15 lb)
- Fitting Type
- Direct Mount
- Special Feature
- Solid brass contacts to reduce corrosion-related failures
What’s in the Box
- 1 x Camshaft Position Sensor (Replaces 3859082)
Installation Notes
- Disconnect the negative terminal of the boat's battery.
- Locate the existing camshaft position sensor on the engine block.
- Carefully unplug the 3-pin electrical connector from the old sensor.
- Remove the mounting bolt securing the sensor to the engine.
- Gently twist and pull to remove the old sensor. Clean the mounting surface.
- Lightly lubricate the O-ring on the new sensor with clean engine oil before installation.
- Insert the new sensor, ensuring it is properly seated, and secure it with the mounting bolt.
- Reconnect the electrical connector firmly.
- Reconnect the battery terminal and start the engine to verify proper operation.
Troubleshooting & FAQ
How do I know if my camshaft sensor is failing?
Common signs of a faulty camshaft position sensor include difficulty starting the engine, rough idling, stalling, reduced engine power, poor acceleration, and the check engine light illuminating.
Will this sensor fit my Volvo Penta 8.1L engine?
This sensor is designed for the Volvo Penta 8.1L series (Gi, GSi, GXi, OSi) from 2001 to 2007, up to serial number 4012110799. Always cross-reference your original part number and check the compatibility table to ensure a perfect match.
What causes these sensors to fail?
Failure is typically caused by heat cycling, vibration, or exposure to oil and other contaminants over time, which can degrade the plastic housing and internal electronics. Corrosion on the contacts can also cause signal loss.
Can a bad camshaft sensor cause a no-start condition?
Yes. The engine control module (ECM) relies on the camshaft sensor's signal to time fuel injection and spark. If the signal is missing or incorrect, the engine may not start at all.
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.
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