# Service bulletin SD\-13\-4860

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 11037402
- Published by NHTSA: 2026\-09\-21
- Manufacturer's number: SD\-13\-4860
- Manufacturer's date: 2026\-08\-03
- NHTSA component: SERVICE BRAKES
- Manufacturer's system: ABS: Sensors

## NHTSA's summary

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.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11037402-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11037402-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Brakes

## Vehicles listed

- BENDIX BENDIX

JSON: [/v1/bulletins/11037402](/v1/bulletins/11037402)

[Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%20SD-13-4860&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F11037402&vehicle=Service%20bulletin%20SD-13-4860)