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Service bulletin FSB-32-50

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 id10056860
Published by NHTSA2015-02-28
Manufacturer's numberFSB-32-50
Manufacturer's date2014-10-01
ReplacesFSB-32-50-A
NHTSA componentEQUIPMENT

NHTSA's summary

FREIGHTLINER DUE TO INCORRECT INSTALLATION OF SENSOR, LINKAGE, AND/OR Z-BRACKET THE RIDE HEIGHT SENSOR ARMS ARE BROKEN ON SOME TRUCKS WITH WABCO ELECTRONICALLY CONTROLLED AIR SUSPENSION (ECAS), AND MOUNTED AFT RATHER THAN FORWARD OF BRACKET. *PE UPDATED 3/24/15. *PE

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

Equipment and accessories

Vehicles listed
FREIGHTLINER CASCADIA2015

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

Recalls for the same vehicles and component
17V8100002017-12-15. EQUIPMENT
16V1430002016-03-09. EQUIPMENT:APPLIANCE:AIR CONDITIONER; EQUIPMENT:ELECTRICAL
14V5880002014-09-23. EQUIPMENT:ELECTRICAL

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
TSN 32-092021-05-13. Service bulletin. TSN for all Cascadia vehicles equipped with an Airliner rear suspension and the HD 6-piece bolted style forward suspension crossmember - Cascadia vehicles equipped with an Airliner rear suspension and the HD 6-piece bolted style forward suspension crossmember.
TSN 184842021-05-13. Service bulletin. Technical Service Note on Intermittent loss of power steering assist, LH turn only for Cascadia. Only intended for customers wishing to add a power steering oil cooler. For replacement of the gear reference TSN 46-01
TSN 31-112021-05-13. Service bulletin. TSN for all Cascadia vehicles equipped with a driveline center bearing midship support. Reference the following illustration - Customer complaints of loose fasteners at the bracket to channel bolted connection.
FTLCAE139-20132021-05-12. Service bulletin. INTERIOR STORAGE - Side Storage Bins Removed from Certain Cascadia Sleepers. SEAT BELTS - Height Adjustment Removed from Cascadia Passenger Side Seat Belt. FUEL TANKS - Fuel Tank Changes for 25" and 23" Tanks for Model Year 2015. TRANSMISSION - Correction to Allison 5th Gen Module 84L Definition Example. ADMINISTRATION - Model Year 2015 Changeover Date Established. APPENDIX A - 25" and 23" Diameter Cylindrical Fuel Tank Changes. APPENDIX B - Revised Allison 5th Gen New Modules and Definitions
WI21-0082021-04-23. Service bulletin. Warranty Information Letter announcing DTNA is adjusting the Standard Repair Times (SRTs) shown. The updated times will be applied to repair orders opened on or after April 5, 2021.
DT12 Trans Chafe2021-04-08. Service bulletin. DTNA received a field notification on multiple units regarding diagnostic fault codes that were found to be causing issues to the After Treatment Control Module (ACM). These fault codes indicated that the ACM communication message was not received by the Motor Control Module (MCM) which in certain cases, led to a 25% engine de-rate situation. Further diagnosis revealed that the DT12 wiring harness was chafing and contacting the transmission TCU case. To reduce potential chafing areas, the proposed short-term containment was to route the wiring harness using additional tie straps. This communication applies to Freightliner and Western Star vehicles built with DT12 transmissions.
SB83-1552021-03-26. Service bulletin. Updated Freightliner Service Bulletin for Espar Service Information. This bulletin replaces the version dated January 1, 2015. New Cascadia has been added to the model list.
WP21-0072021-03-24. Service bulletin. Warranty Policy Letter for battery tags. DTNA determined that since adopting the AutoMeter BCT-460DTNA Powernet Assessment Tool (AutoMeter) as the required powernet system tester, not all battery tags have to be retained support Warranty-related claims.
SB54-3082021-02-26. Service bulletin. Freightliner Service Bulletin for Programming Chassis Electronic Control Units (ECUs) With DiagnosticLink.
ICI21-0032021-02-26. Service bulletin. Superseding Letter to an Important Campaign Information Letter to announce a reimbursement available to dealers for travel to a customer's location to perform a recall or field service campaign. Potential travel reimbursement applies to DTNA truck dealers and Detroit Diesel distributors. Thomas Built Buses will be addressed separately. This letter supersedes ICI20-022R.