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Service bulletin FT4651

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 id10240760
Published by NHTSA2023-08-17
Manufacturer's numberFT4651
Manufacturer's date2023-08-16
NHTSA componentFUEL SYSTEM, DIESEL; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM

NHTSA's summary

Failure of DEF sensor GEN 6 within the expected 5-years lifespan.

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, Exhaust and emissions, Fuel system

Vehicles listed
NOVA BUS LFS2016
NOVA BUS LFS2018, 2019, 2020
NOVA BUS LFS ARTIC2015, 2016, 2017, 2018, 2019 (the catalog's model; the bulletin names a series or trim of it)

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

Recalls for the same vehicles and component
24V2310002024-03-27. ENGINE AND ENGINE COOLING:COOLING SYSTEM:HOSES/LINES/PIPING/FITTINGS
22V4160002022-06-13. ELECTRICAL SYSTEM:WIRING:FUSES AND CIRCUIT BREAKERS; ENGINE AND ENGINE COOLING:COOLING SYSTEM:FAN
20212862021-05-14. Fuel System
21V3510002021-05-14. FUEL SYSTEM, DIESEL:FUEL INJECTION SYSTEM:FUEL RAIL
20191712019-04-05. Engine
20172642017-05-16. Engine
20155252015-11-05. Engine

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
FT55542024-03-04. Service bulletin. The Cabin Coolant Level Sensors for the LOW and HIGH levels are swapped.
LI5316ER22024-02-24. Service bulletin. Crank case vent (CCV) hoses may get damaged over time.
LI5427E2023-12-22. Service bulletin. Improved durability of engine-side heat exchanger hoses.
BS5469E2023-12-22. Service bulletin. The belt guard hinge may crack.
FT54482023-11-01. Service bulletin. Rework allied motion e-Steering motor. 24V e-steering power supply threads length tolerances might not be respecting to the drawing specifications.
BS5447E2023-11-01. Service bulletin. Rework allied motion e-Steering motor. 24V e-steering power supply threads length tolerances are not respect to standard.
BS5467E2023-10-17. Service bulletin. Potential presence of a gap may cause frame crack. Only to perform during a frame crack repair process near front bolt of joint #2.
LI5228ER22023-04-27. Service bulletin. DEF GEN4 tank, tank head and sensor will no longer be available in service
FT53612023-04-03. Service bulletin. Coolant pipe assy failing. The adaptor on the Coolant pipe assembly between the engine and circulation pump broke in service at the beginning of the copper thread.
BS5320ER12023-04-03. Service bulletin. Fire light coming on in the dash, Fire detection system