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Service bulletin CONMET DISC BRAK

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 id10179887
Published by NHTSA2020-09-16
Manufacturer's numberCONMET DISC BRAK
Manufacturer's date2020-09-08
NHTSA componentSERVICE BRAKES, HYDRAULIC

NHTSA's summary

ConMet Disc Brake Communication for vehicles with flat rotor disc brakes with aluminum hubs may have rotor mounting studs fracture due to hydrogen embrittlement. A hold has been placed on vehicles at plants and facilities to inspect before releasing for delivery.

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

Brakes

Vehicles listed
FREIGHTLINER BUSINESS CLASS M22021
FREIGHTLINER CASCADIA2021
FREIGHTLINER CORONADO2021

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

Recalls for the same vehicles and component
20264282026-09-09. Brakes
26V5830002026-09-09. ELECTRONIC STABILITY CONTROL (ESC); SERVICE BRAKES, AIR:ANTILOCK
20230512023-02-10. Brakes
23V0730002023-02-10. ELECTRONIC STABILITY CONTROL (ESC); SERVICE BRAKES, AIR:ANTILOCK:MODULATOR
20226262022-11-01. Brakes
22V8170002022-11-01. SERVICE BRAKES, AIR:ANTILOCK:MODULATOR; FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL
20210132021-01-20. Brakes
21V0180002021-01-20. SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:CALIPER
20203052020-07-02. Brakes
20V3900002020-07-02. SERVICE BRAKES, AIR:SUPPLY:QUICK RELEASE VALVE

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
CXA 03_26_ABS LA Fault2026-04-02. Other. CX Advocate for 1810/02 ABS longitudinal acceleration fault (TSB-54-104-WST,TSB-54-379-FTL)
FleetCom_ESC Warning Lamp2026-03-04. Other. Fleet Communications for TSB-54-379-FTL & TSB-54-104-WST ESC warning lamp and ECU replacement
TSB-54-379-FTL2026-02-03. Service bulletin. Revised Technical Service Bulletin for ESC Warning Lamp and ECU Replacement
TSB-54-379-FTL2026-02-03. Service bulletin. Technical Service Bulletin for ESC Warning Lamp and ECU Replacement
FleetCom_ABS Wheel Spd2026-01-08. Other. Fleet Communications for ABS Wheel Speed Sensor Faults
CXA 10_25_Air Dryer Purge2025-11-06. Other. CX Advocate for Experiencing Excessive Purging from Air Dryer
MYCOM_09122025-12025-10-03. Other. My Communications for Parts Alert ABS Harness
SF622REV2022-03-03. Service bulletin. Revised Field Service Campaign for Cascadia, 49X ABS MBSP+ Controller Software Update
ICI22-0152022-03-03. Service bulletin. Important Campaign Information letter for SF622 – Addition of 8x4 Vehicles to Populationx
SF6132021-11-03. Service bulletin. ConMet Front Hub to Rotor Fasteners. On certain vehicles, the front rotor nuts may not be torqued to manufacturer specification. Loose components could cause damage to the ABS tone rings, the ABS sensors, and the anchor plate mounting fasteners.