Standard Ignition ALS3172 front left ABS wheel speed sensor for the 2019-2025 Subaru Forester and other vehicles reports wheel speed to the ABS. It senses how fast the wheel is turning and sends that signal to the brake and traction control systems.
- Constructed of synthetic material made to withstand harsh operating conditions
- Harness with grommets and wire clips for mounting and routing
- Sealed rectangular connector for protection in harsh conditions
- Tested on vehicles for correct integration with electronic safety systems
Quick facts
- Part: Standard Ignition ALS3172 ABS wheel speed sensor
- Fits: 2019-2025 Subaru Forester and other vehicles
- Position: Front left
- Material: Synthetic
- Condition: New
A wheel speed sensor that stops sending a signal can light the ABS or traction control warning. Before you replace this one, rule out a damaged harness or a loose connector, since wiring faults can also set that light.
Fits
It fits the 2019-2025 Subaru Forester and the 2018-2023 Subaru Crosstrek, and it is tested on vehicles for proper fit. This listing is one sensor for the front left; the front right is a separate part. Each side of the front axle takes one.
Specifications
Fit and size
- Position: Front left
- Quantity per vehicle: 1 for this side
- Harness length: 800 mm (31.5 in)
- Bolt holes: 1
- Connector: rectangular, male, 1 connector
- Terminals: 2, male, alligator type
Build and materials
- Material: Synthetic
- Mounting: bolt mount, at the wheel
- Condition: New
- Country of origin: Thailand
In the box
One front left ABS wheel speed sensor. Mounting hardware and a dust shield are not included, so plan on new bolts.
Interchange: ABS3172 · ABSA84 · 533543 · 27540FL030 · 27540FL031 · 27540FL032
Product information is for general reference and may contain errors. See our Disclaimer.
This part cross-references / interchanges with the following part numbers:
ABS3172, ABSA84, 533543, ALS3172, 27540FL030, 27540FL031, 27540FL032
Frequently Asked Questions
Is this the right ABS wheel speed sensor for the 2019-2025 Subaru Forester?
Yes. Standard Ignition ALS3172 fits the 2019-2025 Subaru Forester as the front left sensor. This listing is one sensor for that side only.
Does the Standard Ignition ALS3172 come with a mounting bolt?
No. Mounting hardware and a dust shield are not included, so plan on new bolts. The harness comes with its grommets and wire clips.
How long is the harness on this front left sensor?
The harness is 800 mm (31.5 in) long and ends in a sealed rectangular male connector with two male terminals.
Can a failing front left wheel speed sensor turn on the ABS light?
Yes, it can. A shop can read the stored code to see which wheel is reporting a fault; have it checked promptly, since it involves the brakes.
Is 27540FL030 an interchange number for this sensor?
Yes. 27540FL030 is listed as an interchange for Standard Ignition ALS3172, along with 27540FL031 and 27540FL032.
