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Service bulletin 4255

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 id10004628
Published by NHTSA2003-12-29
Manufacturer's number4255
Manufacturer's date2003-09-01
NHTSA componentSERVICE BRAKES, AIR

NHTSA's summary

REPORTS OF FRONT BRAKE CHAMBER HOSE LEAKS. THE LEAKS MAY OCCUR IN THE HOSE CONNECTIONS CLOSEST TO THE BRAKE CHAMBERS ON BOTH SIDES OF THE VEHICLE. *TT

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Brakes

Vehicles listed
FREIGHTLINER CENTURY
FREIGHTLINER COLUMBIA

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