HomeBrake > SensorsStandard Ignition ALS3172 ABS Wheel Speed Sensor - Front Left
Part #: ALS3172

Standard Ignition ALS3172 ABS Wheel Speed Sensor - Front Left

Front Left
13 vehicles fit this part
Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
Fitment: Subaru, Crosstrek and Forester
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Reliable ABS Wheel Speed Sensor for Subaru Crosstrek and Forester

The Standard Ignition ALS3172 ABS Wheel Speed Sensor is designed to provide accurate wheel speed data for your Subaru Crosstrek or Forester. This sensor helps maintain proper ABS function and vehicle stability by monitoring wheel rotation speed.

  • Compatible with Subaru Crosstrek and Forester models
  • 31.5-inch (800 mm) harness length for flexible installation
  • Male rectangular connector with one terminal and alligator terminal type
  • Bolt mount design with one bolt hole for secure attachment
  • Two male terminals for reliable electrical connection

Product Details and Specifications

The Standard Ignition ALS3172 ABS Wheel Speed Sensor features a bolt mount type with a single bolt hole, ensuring a secure fit at the wheel mounting location. The sensor includes a 31.5-inch (800 mm) harness, providing ample length for routing and connection. It uses a male rectangular connector with one connector quantity and two male terminals, both of which are alligator type for dependable contact. This sensor does not include mounting hardware or a dust shield, so ensure your vehicle’s existing components are compatible during installation.

Purpose and Common Applications

  • Monitors wheel speed to support ABS and traction control systems
  • Helps prevent wheel lockup during braking
  • Maintains vehicle stability and control on slippery surfaces
  • Detects wheel speed discrepancies that may trigger warning lights
  • Replaces faulty or damaged ABS wheel speed sensors on Subaru Crosstrek and Forester

Installation Notes and Tips

Installation requires removal of the wheel and access to the wheel hub area. The bolt mount design uses one bolt hole for securing the sensor. Ensure the connector is properly aligned and fully engaged to avoid electrical issues. Since mounting hardware is not included, retain or source the appropriate bolt for your vehicle. Verify the harness length is sufficient for your specific model year and configuration.

Quality Assurance and Warranty

Standard Ignition parts are manufactured to meet or exceed OEM specifications for fit, form, and function. The ALS3172 ABS Wheel Speed Sensor undergoes rigorous testing to ensure reliable performance. Please refer to Standard Ignition’s warranty policy for coverage details.

BrandStandard Ignition
Part NumberALS3172
Mounting Hardware IncludedNo
Terminal Quantity2
Connector GenderMale
Terminal GenderMale
Connector Quantity1
Connector ShapeRectangular
Dust Shield IncludedNo
Harness Length - inches31.5"
Harness Length - mm800 mm
Mounting LocationWheel
Mounting TypeBolt mount
Number of Bolt Holes1
Terminal TypeAlligator

This part fits 13 vehicles. Search below:

YearMakeModelPositionNotes
2025SubaruForesterFront Left
2024SubaruForesterFront Left
2023SubaruCrosstrekFront Left
2023SubaruForesterFront Left
2022SubaruCrosstrekFront Left
2022SubaruForesterFront Left
2021SubaruCrosstrekFront Left
2021SubaruForesterFront Left
2020SubaruCrosstrekFront Left
2020SubaruForesterFront Left
2019SubaruCrosstrekFront Left
2019SubaruForesterFront Left
2018SubaruCrosstrekFront Left

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

27540FL030533543ABS3172ABSA84ALS3172

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.