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Service bulletin BS4972ER1

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 id10189636
Published by NHTSA2021-04-02
Manufacturer's numberBS4972ER1
Manufacturer's date2021-03-26
NHTSA componentSTEERING; ELECTRICAL SYSTEM

NHTSA's summary

Reports of intermittent low oil level telltale alarms when oil level is adequately filled. Replacement of Hydraulic Oil Level Sensor.

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

Electrical system, Steering

Vehicles listed
NOVA BUS LFS2020

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

Recalls for the same vehicles and component
20253842025-07-22. Steering
25V4760002025-07-22. STEERING:ELECTRIC POWER ASSIST SYSTEM
20251762025-04-07. Electrical
23V6070002023-08-31. ELECTRICAL SYSTEM:WIRING:FUSES AND CIRCUIT BREAKERS
20233482023-06-14. Electrical
20226492022-11-15. Steering
22V8450002022-11-15. STEERING:CRITICAL FASTENERS
20223102022-06-13. Electrical
22V4160002022-06-13. ELECTRICAL SYSTEM:WIRING:FUSES AND CIRCUIT BREAKERS; ENGINE AND ENGINE COOLING:COOLING SYSTEM:FAN
20215682021-08-31. Steering

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
FT55672024-03-29. Service bulletin. Battery Unbalanced Light Logic with AGM Battery.
FT55502024-03-29. Service bulletin. The Parker PHD70 display might freeze or not work properly.
BS5543E2024-02-24. Service bulletin. Battery tray structure cracks due to thin sheet metal.
FT55362023-12-22. Service bulletin. Battery Tray Structure Cracks. Battery hold downs may slip between batteries.
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.
FT54652023-10-29. Service bulletin. Erroneous Fault Codes reporting on the AVM System of Clever Devices.
FT5404E2023-07-12. Service bulletin. There is a potential restriction of fluid due to an improperly placed clamp which could cause the power steering system to not operate has intended.
FT54372023-06-19. Service bulletin. The supplier Lift-U recommends the addition of a detection delay to prevent wrong fault code in the AVM.
BS5320ER12023-04-03. Service bulletin. Fire light coming on in the dash, Fire detection system