2005–2007 Western Star 4900, 2005–2007 Western Star 6900 Recall: ON CERTAIN HEAVY DUTY TRUCKS BUILT WITH SISU FR2P-21, SISU FR2P-26, SISU…
NHTSA campaign 07V571000 · Service Brakes, Air · filed Dec 18, 2007 · verified Jul 30, 2026
The defect
ON CERTAIN HEAVY DUTY TRUCKS BUILT WITH SISU FR2P-21, SISU FR2P-26, SISU FR3P-33, OR SISU FR3P-48 REAR AXLES, A COUNTER-BORE MACHINED IN BOTH ENDS OF THE WORM WHEEL OPENING OF THE SLACK ADJUSTER HOUSING REDUCES MATERIAL THICKNESS BETWEEN THE WORM WHEEL OPENING AND THE WORM SHAFT OPENING. UNDER NORMAL SERVICE A CRACK MAY DEVELOP IN THIS AREA RENDERING THE SLACK ADJUSTER INOPERABLE AND REDUCING BRAKE EFFECTIVENESS.
The risk
REDUCED VEHICLE BRAKING COULD LEAD TO A CRASH.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →The fix — what to do
DEALERS WILL INSPECT THE SLACK ADJUSTERS, AND REPLACE THE ADJUSTER IF FOUND DEFECTIVE. THE RECALL BEGAN ON JULY 31, 2008. OWNERS MAY CONTACT FREIGHTLINER AT 1-800-547-0712.
FREIGHTLINER RECALL NO. FL-518.CUSTOMERS MAY ALSO CONTACT THE NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION'S VEHICLE SAFETY HOTLINE AT 1-888-327-4236 (TTY 1-800-424-9153), OR GO TO HTTP://WWW.SAFERCAR.GOV.
Affected vehicles
| Make | Model | Model years |
|---|---|---|
| Western Star | 4900 | 2005, 2006, 2007 |
| Western Star | 6900 | 2005, 2006, 2007 |
Related recalls
More Western Star 4900 recalls
- 2023 Western Star 4900 and 1 other model — A defect in the inversion valve may delay park brake…
- 2022 FCCC MT45G and 16 other models — Tie rod may be missing a fastener, allowing the steer arm…
- 2020–2023 Freightliner 114SD and 5 other models — Vehicles are equipped with tires that are not compatible…
- 2023 Freightliner 114SD and 4 other models — Tie rod clamps may have been improperly heat-treated…
- 2020 Freightliner Cascadia and 4 other models — Gross Axle Weight Rating (GAWR) listed on the Federal…
Other campaigns involving Western Star vehicles
- 2021–2027 Western Star 47X and 1 other model — A stud connecting the battery to the starter at the frame…
- 2020–2026 Freightliner 108SD and 7 other models — Axle clamp fasteners may be loose, which can result in a…
- 2025–2026 FCCC MT45G and 11 other models — Tie rod castle nut and cotter pin may not be installed…
All Western Star 4900 recalls → · All Western Star recalls →
Source: NHTSA recall database, campaign 07V571000 (manufacturer number FL-518). Data last verified Jul 30, 2026.