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Service bulletin FT5531

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 id10249455
Published by NHTSA2024-01-31
Manufacturer's numberFT5531
Manufacturer's date2024-01-22
NHTSA componentENGINE AND ENGINE COOLING

NHTSA's summary

Oil level creating different issues in service. Cummins recommendation following few parts issues in service.

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

Engine

Vehicles listed
NOVA BUS LFS2022, 2023

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

Recalls for the same vehicles and component
20264242026-09-03. Engine
26V5730002026-09-03. ENGINE AND ENGINE COOLING:COOLING SYSTEM
20261072026-03-10. Engine
20255392025-10-09. Engine
20255132025-09-25. Engine
20247062024-11-19. Engine
24V8730002024-11-19. ENGINE AND ENGINE COOLING:COOLING SYSTEM
24V2310002024-03-27. ENGINE AND ENGINE COOLING:COOLING SYSTEM:HOSES/LINES/PIPING/FITTINGS

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
BS5571E2024-04-30. Service bulletin. The HVAC generator engine pulley has bolts that are too long.
BS5580E2024-04-30. Service bulletin. One fire suppression system pipe may be installed backwards and interfere with an alternator cable, creating friction that could damage one or both components.
BS5572E2024-03-29. Service bulletin. Water Sensor in E-Steering Compartment.
BS5572E2024-03-29. Service bulletin. Water Sensor in E-Steering Compartment.
FT55542024-03-04. Service bulletin. The Cabin Coolant Level Sensors for the LOW and HIGH levels are swapped.
FT5531R12024-02-24. Service bulletin. Oil level creating different issues, Cummins recommendation following few parts issues.
FT55392024-02-24. Service bulletin. Buses logging cabin and engine coolant pressure codes as reported by Clever Device.
BS5532E2024-01-31. Service bulletin. Grid heater cable loose due to workmanship issues.
BS5490E2024-01-20. Service bulletin. Fuse holder for the electric cooling fans require an improve protection against road debris.
FT55172023-12-23. Service bulletin. Grid heater cable loose due to workmanship issues.