Spectra S10577 Engine Crankshaft Position Sensor

Spectra S10577 Crankshaft Position Sensor

The Spectra S10577 engine crankshaft position sensor provides the signal the ignition system uses to monitor engine speed and set timing. It is a standard replacement sensor for Subaru applications, including WRX and Forester fitments, with a 12-volt design, oval female connector, and 3 male terminals.

Key Features

• Engine crankshaft position sensor for ignition timing and RPM signal input
• Standard replacement design for direct service use
• 12.0-volt electrical specification
• Oval 1-connector layout with 3 terminals
• Female connector and male terminal configuration
• Black sensor body with mounting bracket included
• Blade terminal type and 14.8 mm sensor body diameter

Product Details

Built for Subaru engine management systems, the Spectra S10577 helps the ECU track crankshaft position so ignition timing and engine speed data stay accurate. This part number is used on 2015-2021 Subaru WRX and 2014-2018 Subaru Forester applications, making it a direct-fit choice for owners searching for a Subaru WRX crankshaft position sensor or a Subaru Forester crankshaft position sensor. Part number S10577 is also a useful reference when matching replacement sensors by OE-style interchange.

This part cross-references Standard Ignition PC1031 for the same application.

What It Helps Resolve

• Crankshaft position signal loss
• Hard starting caused by incorrect engine speed input
• Intermittent stalling related to timing signal interruption
• Check engine light concerns tied to crank sensor faults
• Rough running from inaccurate ignition timing data

Installation Notes

Verify connector shape, terminal count, and mounting style before installation. The S10577 uses a female oval connector with 3 male terminals and includes a mounting bracket, so confirm the sensor location and harness routing match the original part. Inspect the connector and surrounding wiring for corrosion, damage, or oil contamination before replacing the sensor.

Quality Assurance

Spectra manufactures this crankshaft position sensor as a standard replacement component for service applications. The design follows the functional role of the original sensor by supplying crankshaft position and engine speed data needed for ignition timing control.