IC BUS CE

STRUCTURE:BODY:ROOF AND PILLARS

Navistar, Inc. (Navistar) is recalling certain 2022-2023 IC Bus CE, and 2022-2023 IC RE transit buses. The roof panel may have been manufactured with insufficient joint strength.

Risk: A school bus roof panel with insufficient joint strength may separate during a crash, increasing the risk of injury.

SERVICE BRAKES, HYDRAULIC:FLUID

Navistar, Inc. (Navistar) is recalling certain 2016 International DuraStar, 2018-2020 and 2023-2024 International 1300FBC Stripped chassis, 2019-2022 IC Bus CE Commercial bus, 2019-2024 IC Bus TC Commercial bus, and 2019-2024 International MV vehicles. The brake pressure switch assembly may leak brake fluid into the brake pressure switch's electrical components and cause an electrical short-circuit.

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

SERVICE BRAKES, AIR:ANTILOCK:ABS WARNING LIGHT

Navistar, Inc. (Navistar) is recalling certain 2021-2024 International HV, HX, LoneStar, LT, MV, eMV, and RH trucks, and IC Bus CE, 2021-2023 IC Bus RE, and 2022-2023 IC Bus TC Commercial Buses. The anti-lock brake system (ABS) indicator light does not remain illuminated when a malfunction exists, and when the vehicle's ignition switch is on, and the vehicle is in motion. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 121, "Air Brake Systems."

Risk: An ABS indicator light that fails to remain illuminated will not alert the driver of an ABS malfunction, which could increase the risk of a crash.

STEERING:CRITICAL FASTENERS

Navistar, Inc. (Navistar) is recalling certain 2021-2022 International CV, 2022-2023 International HV, 2023 IC 1300 FBC, CE, RE, TC, International MV, HX, LT, RH, and LoneStar vehicles. The hex flange lock nuts, used in the suspension and steering joints, were improperly heat treated and may lose tension over time.

Risk: A loss of tension in the steering and suspension joints may lead to steering instability and increase the risk of a crash.

SUSPENSION:MULTIPLE AXLE:TORQUE ARM

Navistar, Inc. (Navistar) is recalling certain 2023 IC CE and IN RE commercial buses. The fasteners that connect the transverse torque arm to the rear axle housing may have been tightened incorrectly, which can allow the rear axle to shift side to side.

Risk: A rear axle that moves side to side can cause a loss of handling and control, increasing the risk of a crash. In addition, a loose rear axle may cause vehicle instability during an evacuation in an emergency, increasing the risk of injury.

ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM)

Navistar, Inc. (Navistar) is recalling certain 2020-2021 IC CE transit buses. The engine control module (ECM) may set a fault code that results in an unexpected engine shut down.

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.

FUEL SYSTEM, DIESEL: PRE-HEATER

Navistar, Inc. (Navistar) is recalling certain 2017-2021 IC CE School Buses equipped with Cummins B6.7 diesel engines with fuel module option number FS90301 or FS90453. The electric fuel heater within the fuel module may overheat and cause plastic in the fuel heater to melt and potentially catch fire. It may also lead to engine stalling.

Risk: A fire increases the risk of injury. An engine stall can increase the risk of a crash.

FUEL SYSTEM, DIESEL: PRE-HEATER

Navistar, Inc. (Navistar) is recalling certain 2017-2020 International WorkStar and International DuraStar, 2018-2019 IC 1300 FBC Commercial and IC HC Commercial, 2018-2021 IC CE Commercial, International MV and International HV, and 2019-2021 IC TC Commercial buses with Cummins B6.7 diesel engines with a fuel module option number FS90301 or FS90453. The electric fuel heater within the fuel module may overheat and cause plastic in the fuel heater to melt and potentially catch fire. It may also lead to engine stalling.

Risk: A fire increases the risk of injury. An engine stall can increase the risk of a crash.

EXTERIOR LIGHTING

Navistar, Inc. (Navistar) is recalling certain 2021-2022 IC Bus CE school buses. The weather seal of the illuminated stop sign unit may allow contaminants to enter into the unit, resulting in reduced performance. In certain cases, an electrical short may occur which would render the unit inoperable.

Risk: If the sign performance is inhibited, or completely inoperable, it can reduce the visibility for oncoming drivers, increasing the risk of a crash.