Hella 230040521 ABS Wheel Speed Sensor - Rear Left

HELLA ABS Wheel Speed Sensor for Rear Axle

Restore accurate wheel speed monitoring with this HELLA ABS wheel speed sensor, part number 230040521. Built as a standard replacement for the rear axle wheel side, it supports stable ABS operation by sending precise wheel movement data to the braking system.

• ABS wheel speed sensor for rear axle applications
• Hall sensor design for accurate speed detection
• Wiring harness included for a cleaner service replacement
• 2-pin female connector with round connector shape
• Gray connector color and holder included
• 41.73 in. cable length / 1060 mm wiring harness length
• Standard replacement grade for select Ford and Mercury vehicles

Fitment and Vehicle Coverage

Compatible with 2005-2007 Ford Five Hundred, rear left; 2005-2007 Ford Freestyle, rear left; and 2005-2007 Mercury Montego, rear left. This HELLA ABS wheel speed sensor, part number 230040521, is specified for rear axle wheel-side use and includes the sensor wire harness for these applications.

This part cross-references Standard Ignition ALS501 for the same application.

How This Sensor Helps

• Restores ABS wheel speed signal loss at the rear axle
• Addresses ABS warning light concerns caused by sensor faults
• Helps correct erratic braking control from inaccurate wheel speed input
• Supports traction and stability system operation when wheel data is interrupted
• Replaces damaged harness or connector issues at the rear left wheel

Installation Notes

Mounting hardware is not included. This sensor is designed for the rear axle wheel side and uses a 2-pin male terminal arrangement with a female connector. Verify connector shape, harness length, and rear left fitment before installation. Assy/disassy by qualified personnel is required.

Quality Assurance

HELLA engineers this ABS wheel speed sensor as a durable replacement part for demanding road conditions. The Hall sensor design, integrated harness, and holder help support reliable service life and consistent braking-system input on the listed Ford and Mercury models.