{"vehicle":{"id":"1994_western-star_4800","year":1994,"make":"Western Star","model":"4800"},"as_of":"2026-10-19","counts":{"count":2,"by_type":[{"id":"service_bulletin","name":"Service bulletin","count":2}],"components":[{"id":"engine","name":"Engine","count":1},{"id":"fuel-system","name":"Fuel system","count":1},{"id":"suspension","name":"Suspension","count":1},{"id":"powertrain","name":"Transmission and driveline","count":1},{"id":"wheel-bearing","name":"Wheel bearing","count":1}],"codes":[],"topics":[]},"bulletins":[{"nhtsa_id":10044353,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2012-06-14","date":"2012-05-01","document_id":"SB-49-12","mfr_campaign":null,"component":"ENGINE AND ENGINE COOLING:ENGINE:DIESEL; FUEL SYSTEM, DIESEL","summary":"WESTERN STAR: AROUND THE DIESEL EXHAUST FLUID (DEF) AN EXCESSIVE AMOUNT OF CRYSTAL OR POWDER BUILT UP INDICATES A LEAK CAUSED BY EVAPORATION OF DEF EXPOSED TO AIR AND/OR DAMPNESS. *PE","document":null,"url":"https://open.wenmarpro.com/bulletins/10044353"},{"nhtsa_id":10043820,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2012-04-27","date":"2012-02-01","document_id":"35-7","mfr_campaign":null,"component":"SUSPENSION:FRONT:WHEEL BEARING; SUSPENSION:MULTIPLE AXLE; POWER TRAIN:DRIVELINE:CENTER SUPPORT BEARING","summary":"WESTERN STAR: LUBRICATE WHEEL BEARINGS, REAR DRIVE AXLES. *JS","document":null,"url":"https://open.wenmarpro.com/bulletins/10043820"}],"next_cursor":null,"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":[]}