# Service bulletin SD\-13\-4860\_004

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: 11030747
- Published by NHTSA: 2026\-04\-06
- Manufacturer's number: SD\-13\-4860\_004
- Manufacturer's date: 2026\-03\-26
- NHTSA component: ELECTRICAL SYSTEM; SERVICE BRAKES
- Manufacturer's system: ABS: Wheel Speed Sensor

## NHTSA's summary

Service Data \- Bendix® WS\-24™ Antilock Wheel Speed Sensor 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 electropneumatic 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 document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11030747-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11030747-9999.pdf)

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

## Components

Brakes, Electrical system

## Vehicles listed

- BENDIX BENDIX
- BENDIX WHEEL ENDS

JSON: [/v1/bulletins/11030747](/v1/bulletins/11030747)

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