2021 IC BUS CESB — Problems, Recalls & Safety Data
N/A
Safety Rating
3
Owner Complaints
4
Recalls
2
Service Bulletins
0
Investigations
Overview of the 2021 IC BUS CESB
The 2021 IC BUS CESB has received a total of 3 safety complaints filed with the National Highway Traffic Safety Administration (NHTSA). There have been 4 recall campaigns affecting this vehicle, covering issues with SERVICE BRAKES, HYDRAULIC:FLUID, STRUCTURE:BODY. 2 technical service bulletins have been issued by International Motors, LLC for this model year. The most commonly reported problem area is the Engine (2 complaints).
Recalls for the 2021 IC BUS CESB
NHTSA has recorded 4 recalls for the 2021 IC BUS CESB, potentially affecting up to 39,730 vehicles.
Recall 25V503000 — SERVICE BRAKES, HYDRAULIC:FLUID
| 16,553 vehicles affected
Defect: 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.
Consequence: An electrical short in the brake pressure switch can overheat the circuit and increase the risk of a fire while driving or parked.
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...
View full details →Recall 25V580000 — STRUCTURE:BODY
| 457 vehicles affected
Defect: 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...
Consequence: Reduced structural integrity may increase the risk of injury in a crash.
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.
View full details →Recall 23V398000 — SERVICE BRAKES, HYDRAULIC:FLUID
| 15,398 vehicles affected
Defect: 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.
Consequence: An electrical short in the brake pressure switch can overheat the circuit and increase the risk of a fire while driving or parked.
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...
View full details →Recall 21V837000 — ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM)
| 7,322 vehicles affected
Defect: 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.
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.
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.
View full details →Owner Complaints for the 2021 IC BUS CESB
3 complaints have been filed with NHTSA for the 2021 IC BUS CESB. Below is a breakdown by vehicle component.
| Component | Complaints | Crashes | Fires | Injuries | Deaths |
|---|---|---|---|---|---|
| Engine | 2 | 0 | 0 | 0 | 0 |
| Fuelpropulsion System | 1 | 0 | 0 | 0 | 0 |
Most Recent Complaints
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.
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.
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.
Safety Rating for the 2021 IC BUS CESB
NHTSA has not yet tested the 2021 IC BUS CESB in its New Car Assessment Program.
Technical Service Bulletins for the 2021 IC BUS CESB
International Motors, LLC has issued 2 technical service bulletins (TSBs) for the 2021 IC BUS CESB. TSBs are notices sent by manufacturers to their dealers describing a known issue and the recommended repair procedure.
IK0900141 — ENGINE
This document will guide a user to replace and reroute Charge Air Cooler (CAC) for vehicles built with the Cummins ISB and B6.7 engines.
21507 — ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM)
With the vehicle in motion, the engine control module (ECM) may set a fault code resulting in engine shut down without warning. Only models equipped with certain PSI engines
NHTSA Investigations for the 2021 IC BUS CESB
There are no NHTSA defect investigations on record for this vehicle.
Other Model Years of the IC BUS CESB
- 2016 IC BUS CESB — 1 complaint
- 2017 IC BUS CESB — 0 complaints
- 2018 IC BUS CESB — 0 complaints
- 2019 IC BUS CESB — 0 complaints
- 2020 IC BUS CESB — 0 complaints
- 2021 IC BUS CESB (current)
- 2022 IC BUS CESB — 6 complaints
- 2023 IC BUS CESB — 1 complaint
- 2024 IC BUS CESB — 0 complaints
- 2025 IC BUS CESB — 1 complaint
- 2026 IC BUS CESB — 0 complaints
Other IC BUS Models
- IC BUS CE — 23 total complaints
- IC BUS PB105 — 11 total complaints
- IC BUS CASB — 4 total complaints
- IC BUS RESB — 4 total complaints
- IC BUS CE SBUS — 2 total complaints
- IC BUS BE — 1 total complaint
- IC BUS FECB — 1 total complaint
- IC BUS RE — 1 total complaint