Spectra S10571 Engine Crankshaft Position Sensor

Spectra S10571 Crankshaft Position Sensor

The Spectra S10571 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 Forester, Legacy, Outback, WRX, Ascent, Crosstrek, Impreza, BRZ, and XV Crosstrek.

Key Features

• 5.0-volt crankshaft position sensor for ignition timing and RPM monitoring
• Standard replacement grade for direct service use
• Black sensor body with oval female connector
• 3-terminal, male terminal design
• 1 connector and 1 mounting hole
• Sensor body diameter: 15.8 mm
• Wiring harness not included
• Mounting bracket not included

Detailed Description

The Spectra S10571 is an engine crankshaft position sensor that reports crankshaft speed and position data to the engine management system. That information supports ignition timing control and engine RPM calculation, helping eliminate the need for manual distributor timing on equipped systems. This part cross-references Standard Ignition PC1053 for the same application. For Subaru Forester, Legacy, and Outback service work, the S10571 offers a direct-fit replacement path when the original crank sensor has failed or is producing inconsistent signals.

What It Helps Resolve

• Hard starting caused by a missing or unstable crankshaft signal
• Intermittent stalling related to crank position sensor failure
• Rough running from incorrect ignition timing input
• Check engine light conditions tied to crankshaft speed or position faults
• Erratic engine RPM readings during operation

Installation Notes and Tips

Verify connector shape, terminal count, and sensor body diameter before installation. The S10571 uses a 5.0-volt, 3-terminal female connector with a single mounting hole, so matching the OE connector and mounting style is important. Inspect the harness connector for corrosion or damaged terminals before installing the new sensor. This part is listed for 2014-2024 Subaru applications, including Fits 2017-2024 Subaru Forester, N/A; Fits 2018-2024 Subaru Legacy, N/A; Fits 2018-2024 Subaru Outback, N/A; Fits 2022-2024 Subaru WRX, N/A; Fits 2019-2023 Subaru Ascent, N/A; Fits 2016-2023 Subaru Crosstrek, N/A; Fits 2015-2023 Subaru Impreza, N/A; Fits 2017-2020 Subaru BRZ, N/A; and Fits 2014-2015 Subaru XV Crosstrek, N/A.

Quality Assurance

Spectra supplies this crankshaft position sensor as a standard replacement part built to meet the functional requirements of the original engine signal sensor. Confirm fitment by year, make, and model before ordering, especially on Subaru Forester, Legacy, and Outback applications. Part number S10571 is provided for catalog matching and service reference.