2021 Ic Bus Tc problems, complaints & recalls
Safety recalls (3)
Service Brakes, Hydraulic:fluid 2025-08-06 · campaign 25V502000 · 4,764 vehicles ⚠ PARK OUTSIDE
Defect: International Motors, LLC (International) is recalling certain 2018 International 4000 Series 4300, 2017-2025 MV, 2018-2024 1300 FBC, 2018-2025 IC Bus TC, and 2024-2025 IC Bus CECB 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.
Fix: 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 are expected to be mailed December 15, 2025. Owners may contact International customer service at 1-800-448-7825. International's number for this recall is 25509. Vehicles previously repaired under 23V397 will need to have the new remedy completed.
Service Brakes, Hydraulic:fluid 2023-06-02 · campaign 23V397000 · 6,786 vehicles ⚠ PARK OUTSIDE
Defect: 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.
Fix: Owners are advised to park outside and away from structures until the recall repair is complete. Dealers will replace the brake pressure switch 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 23517.
Fuel System, Diesel: Pre-Heater 2020-04-17 · campaign 20V219000 · 27,421 vehicles
Defect: 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
Risk: A fire increases the risk of injury. An engine stall can increase the risk of a crash.
Fix: Cummins will notify the affected Navistar customers and dealers will disable the fuel heater by either installing a plug in place of the heater or otherwise rendering the fuel heater inoperable and removing the fuse supplying electrical power to the fuel heater and installing a cover over the wire harness connector, free of charge. The recall began May 28, 2020. Owners may contact Cummins customer service at 1-800-286-6467.
Service bulletins (58)
Technical service bulletins are repair instructions manufacturers send dealers for known issues. Unlike recalls, the fix is not automatically free — but naming the bulletin at the service desk can save diagnosis time and support goodwill repairs.
Engine 2026-02-05 · IK2600090 · Other
new carb idle reduction change request
Electrical System 2026-02-03 · IK4300035 · Service Bulletin/Repair Instructions
this tool is designed to compare diamond logic feature data across multiple vehicle configuration files. it allows users to quickly load files either manually or directly from the diamond logic builder vehicles folder using vin-based selection. as files are added or removed, the comparison runs auto
Engine 2026-01-26 · IK2600255 · Other
this document provides guidance for assessing the feasibility of implementing a customer-requested change to an engine or vehicle parameter/feature. customer requested changes will be approved in accordance with the requirements specified in 40 cfr part 1037 to ensure continued compliance with green
Engine 2026-01-02 · IK2600047 · Service Bulletin/Repair Instructions
engine replacements for all international engines will need to follow this procedure.
Structure:body 2025-12-19 · IK1600272 · Service Bulletin/Repair Instructions
this document will guide the user through a step-by-step procedure for detecting water leaks in vehicle cabs and windshields using an ultrasonic sound detector.
Power Train 2025-12-05 · IK0600030 · Service Bulletin/Repair Instructions
this document will guide the user through understanding prop shaft codes and understanding the variations of prop codes. (metric prop codes start with the number a 4 and non metric prop codes start with a 2.)
Showing the 6 most recent of 58 bulletins. Search all of them free at nhtsa.gov.
What owners report
No detailed complaint narratives on file.
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.