2021 Ic Bus Cesb
Safety record from NHTSA: recalls, owner complaints, investigations and service bulletins.
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These records cover every 2021 Ic Bus Cesb. To see whether one car still needs a recall repair, decode its VIN or check it with NHTSA.
Recalls
4 recalls name the 2021 Ic Bus Cesb. Newest first.
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…
Risk and remedy
Risk
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.
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.
Risk and remedy
Risk
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 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.
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.
Risk and remedy
Risk
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 September 29, 2023. Owners may contact Navistar's customer service at 1-800-448-7825. Navistar's number for this recall is 23518.
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.
Risk and remedy
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.
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.
Owner complaints
3 complaints
What owners report most
Latest complaints
- Unknown or other
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
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
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.
Service bulletins
Technical service bulletins and other communications the manufacturer sent dealers about this vehicle. Ask a dealer for the full document by its number.
- 11010428This article addresses chassis lean conditions on all chassis. This does not include any diagnostics for body leans such as a cab lean. Keep in mind that a chassis lean may cause or accentuate a cab lean. Filling out the printable form and using the notes in blue will help you to determine the source of the lean and identify the action and parts required to correct the lean.
- 11006672This document will guide a user to replace and reroute Charge Air Cooler (CAC) for vehicles built with the Cummins ISB and B6.7 engines.
- 11005541This document will guide the user through the exhaust manifold inspection process and cover the change in the exhaust manifold installation procedure to prevent damage due to thermal expansion.
- 11000880The purpose of this article is to provide updated repair guidelines for the engine oil pan leak on all 8.8L gasoline and LPG.
- 10253979This document is to guide users to eliminate brake pedal rattle noise.
- 10253970This document details the procedure that must be followed to ensure proper alternator troubleshooting.
- 10253960This document covers battery diagnostics, maintenance and storage requirement.
- 10246231J1939 Data Link Source Address Information
- 10243610How to request a horsepower quote; all International and Cummins engines
- 10243605Bus seat back foam inspection guidelines
- 10243601Cummins B6.7 Grid Heater Relay
- 10243596General Wheel Speed Sensor Troubleshooting
- 10243595Diagnosis of chassis wander complaints.
- 10241560Luggage rack upholstery repair; only busses equipped with luggage rack.
- 10241555J1939 Data Link Source Address Information
- 10241554J1939 Data Link Troubleshooting
- 10238862Bus Diesel fuel Cap Leaks; only models built 11/30/2020 through 05/18/2023
- 10238858QLS Emergency Calibration Revert Process
- 10237474CE Bus Engine Cover Sealing
- 10237462QLS Emergency Calibration Revert Process
- 10237447Per agreement with EPA and CARB, Cummins, Inc. provided an emergency calibration for Cummins ISB, B6.7, ISL9, L9, and X15 engines when a DEF Quality Sensor (DQS) was not available. This action addressed the Diesel Exhaust Fluid (DEF) Quality Sensor failures in the field and the unavailability of parts due to the worldwide chip shortage. This recall is step two of this program designed to revert all affected vehicles back to the certified calibration and to provide them with the latest improved DQS and Coolant Control Valve (CCV) designs. Additionally, the emergency calibration and the restoration to the certified calibration with the latest improved DQS and Coolant Control Valve (CCV) designs have no effect on vehicle Emissions.
- 10234015Cummins Programming guide and fault codes285 & 265; only vehicles built with Cummins B6.7, X15, or L9 engines
- 10234007Telematics installation guidelines - Only units with 500K data link
- 10234000Starter diagnostics and warranty claim procedure for all engines and all chassis EXCLUDING vehicles equipped with PSI engines or Cummins ISB engine with Allison transmissions
- 10232612Air Compressor Inlet Hose Chaffing / Leaking
- 10231068QLS Emergency ECM Calibration; only models equipped with Cummins B6.7, X15, L9, or International A26 engines
- 10227455J1939 Data link source address information
- 10227446QLS Emergency Calibration. applies to 2016 and newer Cummins B6.6, X15, and L9 engines and all A26 engines
- 10227431In cold weather, especially during engine warmup, the engine may experience a misfire condition resulting in setting the Malfunction Indicator Lamp (MIL) and possible increase in emissions. Only models with Generation II PSI 8.8L LP engines.
- 10222490Pico Scope CCOS (Crankcase Separator Test)
- 10219330PicoScope Test One Channel RCT
- 10219325PicoScope Test Resistance and Ohmmeter
- 10219319PicoScope Test for Datalink (CAN) Health Shorts & opens
- 10219314PicoScope Test - Battery Loss of Charge - Parasitic Draw Test
- 10213208Bus, DuraStar, and MV air compressor inlet hose chaffing/leaking; equipped with Cummins ISB / B6.7 Engines
- 10208431J1939 Data Link Source Address Information
- 10207076With 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
- 10204141Greenhouse Gas Phase 2 Regulatory Compliance Implementation
- 10204139Power Steering Diagnostics Flow / Pressure Specifications For Power Steering Gears and Power Steering Pumps
- 10204137J1939 Data Link Troubleshooting
Every Ic Bus Cesb model year
Bars are owner complaints, dots mark years with recalls. Select a year to open its report.