{"nhtsa_id":11030747,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-04-06","date":"2026-03-26","document_id":"SD-13-4860_004","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM; SERVICE BRAKES","mfr_system":"ABS: Wheel Speed Sensor","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","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11030747-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11030747-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11030747","components":[{"id":"brakes","name":"Brakes","parent":null},{"id":"electrical","name":"Electrical system","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"BENDIX","model":"BENDIX","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]},{"make":"BENDIX","model":"WHEEL ENDS","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":[]}