2020–2023 Ic Bus Cesb Engine & Cooling Recall 21V837000 (Ic Bus 21507)

NHTSA recall 21V837000 (Ic Bus recall 21507) covers about 7,322 2020–2023 Ic Bus Cesb vehicles (engine & cooling), filed with NHTSA Oct 25, 2021. There is no do-not-drive or park-outside advisory.

Source: NHTSA campaign 21V837000 · Data as of Nov 6, 2026 · By CarWhere Research

7,322
vehicles affected (potential)
2020–2023
model years
Oct 25, 2021
filed with NHTSA
None
NHTSA advisory

What's recalled

Component: Engine & cooling (engine, engine control module (ecu/ecm))

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.

The risk

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.

The remedy and its status

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.

Status: NHTSA lists Jan 18, 2022 as the owner-notification date for this campaign.

Ic Bus recall number 21507

NHTSA lists the manufacturer's own recall number for 21V837000 as 21507. Owner letters and dealer service departments often use this code, so a search for "21507 recall" refers to the same campaign.

Affected models and years

Models and model years NHTSA lists for this campaign. Not every vehicle of a listed model and year is included; check by VIN.

VehicleModel yearsMore
Ic Bus Cesb2020–2023—

Key dates

Report filed with NHTSA
Oct 25, 2021
Owner notification
Jan 18, 2022
Recall initiated by
the manufacturer
Filed by
Navistar, Inc.

Check your VIN for 21V837000

  1. Find the 17-character VIN on the driver-side dashboard (visible through the windshield), the door-jamb sticker, or your registration.
  2. Enter it in NHTSA's free VIN recall lookup. It shows every open recall on that exact vehicle, including this one if it applies and hasn't been repaired.
  3. If 21V837000 is open, call any Ic Bus dealer's service department and give them the recall number (21V837000 or 21507). The repair is free.

Not sure of the exact model or year? Decode it first with the free VIN decoder.

Frequently asked questions

What is recall 21V837000?

NHTSA recall 21V837000 (Ic Bus recall 21507) covers about 7,322 2020–2023 Ic Bus Cesb vehicles (engine & cooling), filed with NHTSA Oct 25, 2021. There is no do-not-drive or park-outside advisory. It covers certain 2020-2023 IC CE school buses.

Is it safe to drive a vehicle with recall 21V837000?

NHTSA's record for 21V837000 carries no do-not-drive or park-outside advisory. The risk NHTSA lists is: "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." Get the free repair as soon as it is available for your vehicle.

How do I know if my vehicle is affected by 21V837000?

Only a VIN lookup can tell you. Not every vehicle of the listed models and years is included, and repaired vehicles drop off. Enter your 17-character VIN in NHTSA's free recall lookup at nhtsa.gov/recalls, or ask any Ic Bus dealer to check it.

What is the fix for recall 21V837000, and is it free?

NHTSA's record says: "Dealers will reprogram the ECM, free of charge." NHTSA lists Jan 18, 2022 as the owner-notification date for this campaign. Safety-recall repairs are done free of charge at authorized dealers.

What is the Ic Bus recall number for 21V837000?

NHTSA lists the manufacturer's own recall number as 21507. Dealers and owner letters often use that code (21507) instead of the NHTSA campaign number 21V837000.

Sources and method

  • NHTSA recall record for 21V837000, from NHTSA's public recall campaign database. Problem, risk and remedy text is NHTSA's own wording.
  • "Vehicles affected" is NHTSA's potential-units-affected count for the whole campaign.
  • Data as of Nov 6, 2026. NHTSA updates campaigns as manufacturers file amendments, so check the official record for the latest.

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