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Service bulletin SF621

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 id10190542
Published by NHTSA2021-04-21
Manufacturer's numberSF621
Manufacturer's date2021-04-09
NHTSA componentSTEERING

NHTSA's summary

Freightliner Field Service Campaign for Freightliner Drag Link Cotter Pin. Errors found in the cotter pin installation process indicate that it may not have been completed properly. This may result in the cotter pin not being bent correctly or missing altogether.

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

Steering

Vehicles listed
FREIGHTLINER 108SD2021
FREIGHTLINER 114SD2021
FREIGHTLINER BUSINESS CLASS M22021

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

Recalls for the same vehicles and component
20230832023-02-20. Steering
23V1050002023-02-20. STEERING:LINKAGES:DRAG:LINK:CONNECTION
21V3690002021-05-19. STEERING:LINKAGES:TIE ROD ASSEMBLY
20212192021-04-12. Steering
21V2560002021-04-12. STEERING:LINKAGES:TIE ROD ASSEMBLY; STEERING:CRITICAL FASTENERS

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
PB33-004-FTL2025-07-08. Service bulletin. Parts Bulletin for Tie Rod Assembly Part Breakdown
CXA 3_25_SAS01T to SAS03T2025-04-02. Other. CX Advocate for SAS01T to SAS03T replacement (TSB54-373-FTL, TSB54-097-WST)
TSB54-373-FTL2025-03-04. Service bulletin. Technical Service Bulletin for SAS01T to SAS03T Replacement Information
ICI23-0102023-04-07. Service bulletin. Important Campaign Information letter communicating that SF660 Field Service Campaign is Replaced by FL967.
SF660A2023-02-04. Service bulletin. Revised Field Service Campaign for Drag Link Tapered Joint
SF6602023-01-06. Service bulletin. Field Service Campaign for Drag Link Tapered Joint
WP20-018R2020-12-12. Service bulletin. Revised Warranty Policy Letter for Alliance/Mascot Aftermarket Warranty and Claim Filing. Revisions are in blue. With Mascot now in partnership with Detroit Reman and Alliance Parts, DTNA is pleased to announce that Mascot coverage has been added to OWL. Remanufactured Alliance/Mascot parts include transmission, differential, steering gear, and steering pump used in an on-highway vehicle applications. The Alliance/Mascot aftermarket warranty coverage period has not changed: depending on the part, coverage is for one (1) or two (2) years and current parts, labor, and reimbursement policies apply.
WP20-0182020-12-12. Service bulletin. Warranty Policy Letter for Alliance/Mascot Aftermarket Warranty and Claim Filing. With Mascot now in partnership with Detroit Reman and Alliance Parts, DTNA is pleased to announce that Mascot coverage has been added to OWL. Remanufactured Alliance/Mascot parts include transmission, differential, steering gear, and steering pump used in an on-highway vehicle applications. The Alliance/Mascot aftermarket warranty coverage period has not changed: depending on the part, coverage is for one (1) or two (2) years and current parts, labor, and reimbursement policies apply.
TechTalk47252020-09-30. Service bulletin. Tech Talk discussion about power steering fluid.