NHTSA vehicle safety data

2021 IC Bus Cesb Recalls & Complaints

The 2021 IC Bus Cesb has 4 NHTSA recall campaigns and 3 owner complaints on file as of November 3, 2026. Recall repairs are usually free at an authorized IC Bus dealer.

NHTSA recall and complaint data for the 2021 IC Bus Cesb. Recall data is refreshed daily from NHTSA.

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2021 IC Bus Cesb owner complaints

Owners have filed 3 complaints with NHTSA about the 2021 IC Bus Cesb, describing incidents dated March 27, 2025 to June 5, 2026.

Most-cited components

Engine 2 complaints
Fuel/Propulsion System 1 complaint
Unknown or Other 1 complaint

Newest complaints

ODI #11743266 · Filed June 10, 2026
Exhaust leaks caused by calapsed exhaust manifold pipes on 34 IC units with PSI engines. they are wrapped with aluminium covering with insulation. This in turn makes high heat tempuraters that split and burn up and disfigure pipes. Which can cause a fire if any oil leakage or fuel occurs. It also…
ODI #11695245 · Filed October 23, 2025
THis is a school bus- Exhaust downpipes leading into the catalytic converters melted down and created large holes in the exhaust pipe itself. Extreme heat developed by engine.
ODI #11653212 · Filed April 7, 2025
School buses. We have a fleet of these and the condition is happening repeatedly and to almost every bus with this PSI brand 8.8L gasoline engine. The engine exhaust downpipes melt from excessive heat and/or fuel. The pipes then crack and produce an exhaust leak near the body firewall. Potential for…

Read all 3 complaints

Missing Underfloor Reinforcement/FMVSS 210, 222

NHTSA #25V580000 · Structure — Body · NHTSA notice

Reported September 4, 2025 · International Motors, LLC

Potentially affected: 457 vehicles

Repair completion: 31.07% (latest rate the manufacturer reported to NHTSA; dataset updated November 3, 2026)

Manufacturer campaign 25514 · Owners notified December 8, 2025

Defect description

International Motors, LLC (International) is recalling certain 2016-2026 IC Bus CESB and 2016-2021 RESB school buses. The underfloor reinforcement may not have been installed, compromising the structural integrity of the buses. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) numbers 210, "Seat Belt Assembly Anchorages" and 222, "School Bus Passenger Seating and Crash Protection."

Safety consequence

Reduced structural integrity may increase the risk of injury in a crash.

Manufacturer remedy

Dealers will inspect and install a reinforcement channel as necessary, free of charge. Owner notification letters were mailed December 8, 2025. Owners may contact International customer service at 1-800-448-7825. International's number for this recall is 25514.

Brake Pressure Switch May Short and Cause Fire

NHTSA #25V503000 · Service Brakes, Hydraulic — Fluid · NHTSA notice

Reported August 6, 2025 · International Motors, LLC

Potentially affected: 16,553 vehicles

Repair completion: 71.97% (latest rate the manufacturer reported to NHTSA; dataset updated November 3, 2026)

Manufacturer campaign 25510 · Owners notified December 15, 2025

Park outside only — fire risk while parked indoors or near structures.

Defect description

International Motors, LLC (International) is recalling certain 2016-2024 IC Bus CESB school buses. The brake pressure switch assembly may leak brake fluid into the brake pressure switch's electrical components and cause an electrical short-circuit.

Safety consequence

An electrical short in the brake pressure switch can overheat the circuit and increase the risk of a fire while driving or parked.

Manufacturer remedy

Owners are advised to park outside and away from structures until the recall repair is complete. Dealers will install a silicone black jumper harness, free of charge. Owner notification letters were mailed December 15, 2025. Owners may contact International customer service at 1-800-448-7825. International's number for this recall is 25510. Vehicles previously repaired under 23V398 will need to have the new remedy completed.

Brake Pressure Switch May Short and Cause Fire

NHTSA #23V398000 · Service Brakes, Hydraulic — Fluid · NHTSA notice

Reported June 2, 2023 · Navistar, Inc.

Potentially affected: 15,398 vehicles

Repair completion: 88.27% (latest rate the manufacturer reported to NHTSA; dataset updated November 3, 2026)

Manufacturer campaign 23518 · Owners notified September 29, 2023

Park outside only — fire risk while parked indoors or near structures.

Defect description

Navistar, Inc. (Navistar) is recalling certain 2016 and 2018-2024 IC Bus CE school buses. The brake pressure switch assembly may leak brake fluid into the brake pressure switch's electrical components and cause an electrical short-circuit.

Safety consequence

An electrical short in the brake pressure switch can overheat the circuit and increase the risk of a fire while driving or parked.

Manufacturer remedy

Owners are advised to park outside and away from structures until the recall repair is complete. Dealers will replace the brake pressure switch assembly and if necessary, the wire harness or fuse, free of charge. Owner notification letters were mailed September 29, 2023. Owners may contact Navistar's customer service at 1-800-448-7825. Navistar's number for this recall is 23518.

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.

Unexpected Engine Shut Down

NHTSA #21V837000 · Engine and Engine Cooling — Engine — Engine Control Module (ECU/ECM) · NHTSA notice

Reported October 25, 2021 · Navistar, Inc.

Potentially affected: 7,322 vehicles

Repair completion: 96.82% (latest rate the manufacturer reported to NHTSA; dataset updated November 3, 2026)

Manufacturer campaign 21507 · Owners notified January 18, 2022

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.

try.vin has no NCAP crash-test rating on file for the 2021 IC Bus Cesb. NHTSA rates some vehicles by body style — pickups by cab, vans by roof height — so check nhtsa.gov/ratings.

3 owner complaints have been filed with NHTSA for the 2021 IC Bus Cesb.

Unknown or Other

ODI #11743266

Incident: June 5, 2026 · Filed: June 10, 2026

Exhaust leaks caused by calapsed exhaust manifold pipes on 34 IC units with PSI engines. they are wrapped with aluminium covering with insulation. This in turn makes high heat tempuraters that split and burn up and disfigure pipes. Which can cause a fire if any oil leakage or fuel occurs. It also has been snapping exhaust manifold bolts away from manifdolds.

Engine

ODI #11695245

Incident: October 23, 2025 · Filed: October 23, 2025

THis is a school bus- Exhaust downpipes leading into the catalytic converters melted down and created large holes in the exhaust pipe itself. Extreme heat developed by engine.

Engine; Fuel/Propulsion System

ODI #11653212

Incident: March 27, 2025 · Filed: April 7, 2025

School buses. We have a fleet of these and the condition is happening repeatedly and to almost every bus with this PSI brand 8.8L gasoline engine. The engine exhaust downpipes melt from excessive heat and/or fuel. The pipes then crack and produce an exhaust leak near the body firewall. Potential for exhaust and flame to escape from the pipe.

Other IC Bus Cesb model years

Check your 2021 IC Bus Cesb VIN

Not every recall applies to every VIN in a given year. Enter the 17-character VIN from your IC Bus Cesb at nhtsa.gov/recalls to see whether your specific vehicle has an unrepaired recall.

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