WenmarOpen by Wenmar Pro

Service bulletin CALFTLWS20-005

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10252330
Published by NHTSA2024-04-02
Manufacturer's numberCALFTLWS20-005
Manufacturer's date2024-03-06
NHTSA componentENGINE AND ENGINE COOLING

NHTSA's summary

Customer Advisory Letter for ESOC Corporation is not Able to Fulfill Orders

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Engine

Vehicles listed
FREIGHTLINER CASCADIA2024
WESTERN STAR 47X2024
WESTERN STAR 57X2024

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
CXA 03_26_Surge Tank2026-04-02. Other. CX Advocate for discolored coolant surge tanks (24CSA-20)
CXA 03_26_SSR2026-04-02. Other. CX Advocate for error generates when SSR is moved into an engine brake position 1,2,3 (TSB-26-058-FTL, TSB-26-009-WST)
FleetCom_Heater Core2026-01-08. Other. Fleet Communications for Heater Core Plugging
TSB54-377-FTL2026-01-07. Service bulletin. Technical Service Bulletin Low Coolant Sensor
FleetCom_SS 3163-FTL2025-12-06. Other. Fleet Communications for Power Steering Reservoir Fill Cap Venting
FleetCom_Low Coolant2025-12-05. Other. Fleet Communications for Low Coolant Sensor
CXA 10_25_Discolored Cool2025-11-06. Other. CX Advocate for Plastic Opaque Surge Tank Staining
CXA_10_25_Low Coolant2025-11-05. Other. CX Advocate for P4, WST X-Series, DD Engines Low/Critical Low Coolant Warnings
CXA_10_25_Conmet Oil Pan2025-11-05. Other. CX Advocate for ConMet Oil Pan Insert Additional Issues
CXA_9_25_Tech Questions2025-10-03. Other. CX Advocate for technical questions/issues raised