{"nhtsa_id":11037402,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-09-21","date":"2026-08-03","document_id":"SD-13-4860","mfr_campaign":null,"replaces":null,"component":"SERVICE BRAKES","mfr_system":"ABS: Sensors","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.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11037402-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11037402-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11037402","components":[{"id":"brakes","name":"Brakes","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"BENDIX","model":"BENDIX","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]}],"as_of":"2026-10-19","note":"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.","attribution":[]}