NHTSA campaign 21V837000 · Manufacturer campaign 21507
IC Bus Recall 21V-837: Unexpected Engine Shut Down
NHTSA recall 21V837000 (Manufacturer campaign 21507) was reported by Navistar, Inc. on October 25, 2021, with 7,322 vehicles potentially affected (per NHTSA). NHTSA's record lists the IC Bus Cesb for model years 2020–2023. Owners were notified on January 18, 2022, per NHTSA.
Updated daily from NHTSA's recall files
Is my vehicle included?
This page lists, by model year, the vehicles NHTSA's recall record names for campaign 21V837000 in the model years try.vin imports (1995 and later); NHTSA's own record can list more. A model year on the list doesn't mean every vehicle of that year is included, and some may already have been repaired.
To see whether a specific vehicle is included and still needs the repair, enter its VIN at nhtsa.gov/recalls.
Free VIN check: decode a VIN to see its year, make and model.
Key facts
- NHTSA campaign
- 21V837000 (also written 21V-837 or 21V837)
- Filed by
- Navistar, Inc.
- Manufacturer campaign number
- 21507
- Report received
- Potentially affected
- 7,322 vehicles (per NHTSA)
- Component
- Engine and Engine Cooling — Engine — Engine Control Module (ECU/ECM)
- Owners notified
Repair completion: 96.82% (latest rate the manufacturer reported to NHTSA; dataset updated October 21, 2026)
NHTSA cautions against comparing completion rates across recalls or manufacturers. How try.vin reads them.
Vehicles listed for this recall
NHTSA's recall record lists these vehicles for recall 21V837000. try.vin imports model years 1995 and later, so NHTSA's own list can be longer. Model years with a try.vin recall page link to it. Build dates are NHTSA's range for a model year (per NHTSA); a vehicle built in that range is not necessarily included.
IC Bus
All IC Bus recallsNHTSA's recall notice
As NHTSA's recall record states it for campaign 21V837000.
Defect description
Navistar, Inc. (Navistar) is recalling certain 2020-2023 IC CE school buses. The engine control module (ECM) may set a fault code that results in an unexpected engine shut down.
Safety consequence
Unexpected engine shut down can increase the risk of a crash. Additionally, a disabled school bus may require an evacuation procedure in an uncontrolled traffic situation, increasing the risk of injury to passengers.
Manufacturer remedy
Dealers will reprogram the ECM, free of charge. Owner notification letters notifying owners of the safety risk were mailed January 18, 2022. Owners may contact Navistar customer service at 1-800-448-7825. Navistar's number for this recall is 21507.
Notes
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.nhtsa.gov.
Sources
Official NHTSA notice for recall 21V837000
Campaign details come from NHTSA's recall files, which try.vin imports once a day. The plain-language subject and the completion rate come from the U.S. Department of Transportation's Recalls Data dataset. How try.vin reads recall data.