Service bulletin SD-13-4860
Manufacturer communication, from NHTSA Manufacturer Communications
- Published by NHTSA
- Sep 21, 2026
- Manufacturer
- BENDIX
- NHTSA ID
- 11037402
- NHTSA category
- Service Bulletin/Repair Instructions
- Applies to, as stated by NHTSA
- BENDIX BENDIX (model year not stated)
- Component, as stated by NHTSA
- SERVICE BRAKES
Text of the manufacturer communication
Service Data - Bendix® WS-24™ Antilock Wheel Speed Sensor DESCRIPTION The Bendix® WS-24™ Wheel Speed Sensor (WSS) is an electromagnetic device used to obtain vehicle speed information for an antilock controller. When the wheel rotates, the sensor and an exciter ring (sometimes called a “rotor” or “tone” ring) generate a simple AC signal. This signal is sent to either the brake controller (Bendix® EC-60™ or Bendix® EC-80™) or the Global Scalable Brake Control electro-pneumatic modulator (Bendix® GSBC® EPM-90™), which analyzes the data and commands the Antilock Braking System (ABS) accordingly. Specifically, the WSS consists of a coil, pole piece, and a magnet. The exciter ring is a steel ring or gear-like device that has regularly spaced high and low spots called “teeth.” The WSS is mounted in a fixed position, while the exciter ring is installed on a rotating member (typically part of the hub) so that its “teeth” move, in close proximity, past the tip of the sensor. The WS-24 WSS is available in both straight and 90° versions to accommodate axle/wheel space limitations.
- Manufacturer document number
- SD-13-4860
- Date of the communication
- 2026-08-03
- Manufacturer component system
- ABS / Sensors
NHTSA reuses some ID numbers across record types. If its page lists more than one record, this one is the manufacturer communication dated Sep 21, 2026.