Volvo Penta Throttle Position Sensor 3857487

Volvo Penta 3857487 is a throttle position sensor used in select Volvo Penta gasoline engine applications. This sensor monitors throttle angle and sends that signal to the engine management system to support proper idle response, throttle transition, and overall engine performance. It is best matched by exact engine serial number and throttle-body application rather than by appearance alone.

Key Features

• Genuine Volvo Penta throttle position sensor reference 3857487
• Measures throttle position for engine management input
• Supports smooth throttle response and stable engine operation
• Used on select Volvo Penta gasoline fuel-injected applications
• Best matched by exact throttle-body and serial-number-based fitment

Engine Compatibility

This part should be treated as a gasoline engine throttle-body sensor rather than a broad all-model sensor. Throttle position sensors can vary by engine family, throttle-body design, and engine control system, so the safest fitment path is to match 3857487 to the exact Volvo Penta engine diagram and serial-number-based application before ordering.

Serial Number Fitment Notice

Match Volvo Penta part number 3857487 to your engine serial number before ordering. Throttle position sensors may look similar across multiple Volvo Penta gas-engine packages while using different connectors, mounting patterns, or calibrations.

When This Part Needs Replacement

This sensor is commonly replaced when the engine shows poor throttle response, unstable idle, hesitation, surging, or fault symptoms related to throttle-position input. It is also worth checking when diagnosing intermittent fuel-injection or idle-control issues on the throttle body.

Installation Notes

Confirm the connector style and mounting pattern before installation, and compare the removed sensor carefully against the replacement part. On throttle-position sensors, exact application matters more than a visual guess. It is also smart to inspect the throttle-body linkage and connector condition during service.

Alternate/Superseded Part Numbers

Use 3857487 as the core OEM reference and confirm any related numbers against the exact serial-number-based parts diagram before ordering. Throttle-body sensors are one of the parts where a close-looking number can still point to a different calibration or mounting style.

Parts Desk Insight

With throttle position sensors, the easy mistake is ordering by engine family alone. Matching the exact throttle body and connector style first usually saves time, especially on Volvo Penta gasoline engines where similar sensors can look almost identical on the bench.

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