New Flyer XE35 2021–2024 — technical service bulletin
Bulletin ITS61988 · NHTSA communication 11037437 · issued Sep 15, 2026
Technical service bulletin
communication type
Fuel/propulsion System
component
2021–2024
model years
6
vehicle entries
Official summary
Instruction to program for the addition of ESS cell minimum and maximum voltages and ESS charge current per customer request
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.