AI Damage2021 NEW Flyer XE35: common problems
The maker issued 26 service bulletins for this year. Details by component below, with sources.
Key figures
- Technical service bulletins (TSB)
- 26
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Electrical system | 0 | 0 | 17 |
| Fuel/propulsion system | 0 | 0 | 8 |
| Suspension | 0 | 0 | 3 |
| Equipment | 0 | 0 | 2 |
| Latches, locks, linkages | 0 | 0 | 2 |
| Seats | 0 | 0 | 2 |
| Engine and cooling | 0 | 0 | 1 |
| Powertrain | 0 | 0 | 1 |
| Structure | 0 | 0 | 1 |
| Other | 0 | 0 | 1 |
Comparison
What to check before buying
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Fuel/propulsion system. Fuel smell, leaks, rough running, fuel-system codes.
- Suspension. Wheel alignment, control arms, subframe, even tire wear.
- Latches, locks, linkages. Door, hood and tailgate latches, especially near the impact.
Manufacturer service bulletins
Bulletin titles as filed with NHTSA.
- Instruction to program for the addition of ESS cell minimum and maximum voltages and ESS charge current…
- Instructions to inspect flooring for ridge/raised area, pull back flooring, add screws and re-apply…
Instructions to inspect flooring for ridge/raised area, pull back flooring, add screws and re-apply flooring in between front luggage racks.
- A consumer notification indicating one of New Flyer's battery suppliers is exiting the market
- This Bulletin is being issued due to New Flyer & MCI have received reports that customers are re-torquing…
This Bulletin is being issued due to New Flyer & MCI have received reports that customers are re-torquing high-voltage (HV) connections during preventative maintenance inspections as outlined in the Preventive…
- Instructions to adjust certain cantilever mounted seats and adjust them to proper height
- This Technical Service Information Bulletin has been issued to remind customers that fill pressure must…
This Technical Service Information Bulletin has been issued to remind customers that fill pressure must not exceed 25 psi to avoid injury or damage components during filling and deaeration of the ESS Battery Thermal…
- Instruction to Service to update vehicles with ELFA 3 to provide improved BMS response to overcharging and…
Instruction to Service to update vehicles with ELFA 3 to provide improved BMS response to overcharging and other functional safety mechanisms, more robust detection of failure modes through DTCs, Battery Data Recorder…
- Instruction to Service for updating ESS drains, remove internal mechanism, re-install and add duckbill
Remove the ESS breather, extract the internal mechanism, remove the three desiccant bags and reinstall the breather. 6 string buses.
- Instruction to Service for updating ESS drains, remove internal mechanism, re-install and add duckbill
Remove the ESS breather, extract the internal mechanism, remove the three desiccant bags and reinstall the breather. 5 string buses.
- Instruction to Service for updating the battery program on certain ELFA3 buses for Improved BMS response…
Instruction to Service for updating the battery program on certain ELFA3 buses for Improved BMS response to overcharging and other functional safety mechanisms, more robust detection of failure modes through DTCs…
- Instruction to Service 60853 to rework a ground cable for the DC link distribution box
- Instructions to Service to install upgraded ESS drain valves - 5 string system
NHTSA lists 26 bulletins for this year; the 12 newest are shown here.
Other years of this model
Questions and answers
What are the most common problems with the 2021 NEW Flyer XE35?
There are no owner complaints in the NHTSA data for this year; the data comes from 26 manufacturer service bulletins.
How many service bulletins (TSB) were issued for the 2021 NEW Flyer XE35?
NHTSA lists 26 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.
Should I buy a 2021 NEW Flyer XE35 from a US auction?
Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.
Other 2021 models
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-04.