2021 International LT
Safety record from NHTSA: recalls, owner complaints, investigations and service bulletins.
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Vehicles › International › LT › 2021
These records cover every 2021 International LT. To see whether one car still needs a recall repair, decode its VIN or check it with NHTSA.
Recalls
13 recalls name the 2021 International LT. Newest first.
International Motors, LLC (International) is recalling certain 2016 7600, 2016-2023 Lonestar, 2018 8600, 2018-2023 LT, 2021-2026 MV, 2022-2023 RH, 2023-2026 HX, and 2025-2026 HV vehicles. Electrical noise and low signal to the power line carrier may cause the ECU to incorrectly process commands or stop working.
Risk and remedy
Risk
Safety systems that depend on the ECU, such as Automatic Traction Control, ABS, Electronic Stability Control, Active Cruise Control, and Collison Mitigation System, may have diminished or lost functionality, increasing the risk of a crash.
Remedy
International will work with Bendix to reprogram the ECU, free of charge. Owner notification letters were mailed January 19, 2026. Owners may contact International's customer service at 1-800-448-7825. International's number for this recall is 25525. Vehicle Identification Numbers (VINs) involved in this recall will be searchable on NHTSA.gov beginning January 12, 2026.
International Motors, LLC (International) is recalling certain 2021-2024 Lonestar, 2021-2025 RH, HV, MV, LT, HX, and 2022 PROSTAR vehicles, equipped with Bendix EC80 Advanced Electronic Control Units (ECU). Electrical noise and low signal to the power line carrier may cause the ECU to incorrectly process commands or stop working.
Risk and remedy
Risk
Safety systems that depend on the ECU (Automatic Traction Control, ABS, Electronic Stability Control, Active Cruise Control, and Collison Mitigation System) may have diminished or lost functionality, increasing the risk of a crash.
Remedy
International will work with Bendix to reprogram the ECU software, free of charge. Owner notification letters were mailed December 16, 2024. Owners may contact International customer service at 1-800-448-7825. International's number for this recall is 24515.
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…
Risk and remedy
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.
Remedy
Towing variant vehicles under this campaign will not be repaired under recall 24V-8918. Dealers will update the software, free of charge. Owner notification letters are expected to be mailed July 24, 2023. Owners may contact Navistar's customer service at 1-800-448-7825. Navistar's number for this recall is 23515.
Navistar, Inc. (Navistar) is recalling certain 2000-2003 International 8100, 2001-2003 International 9100i, 2001-2007 International 9400i, 2001-2010 International 9200i, 2002-2007, 2009 International 8500, 2003-2007, 2013 International 9900i, 2003-2018 International 8600, 2004, 2007 International 9900iX, 2008-2018 International ProStar, 2010-2011, 2013…
Risk and remedy
Risk
Low visibility or obstructed back up lights may not alert other drivers that the vehicle is backing up, increasing the risk of a crash.
Remedy
Dealers will replace the existing rear stop/turn signal lights, free of charge. Owner notification letters were mailed May 06, 2024. Owners may contact Navistar's customer service at 1-800-448-7825. Navistar's number for this recall is 23514.
Navistar, Inc. (Navistar) is recalling certain 2021-2024 International LT and RH trucks. The engine control module (ECM) may be unresponsive to throttle pedal application, which can cause the vehicle to unexpectedly slow to idle speed on the road.
Risk and remedy
Risk
A vehicle that unexpectedly slows to idle speed on the roadway can increase the risk of a crash.
Remedy
Dealers will update the ECM software, free of charge. Owner notification letters are expected to be mailed May 26, 2023. Owners may contact Navistar's customer service at 1-800-448-7825. Navistar's number for this recall is 23509.
Navistar, Inc. (Navistar) is recalling certain 2018-2021 International HV, 2018-2020 International HX, 2018-2021 International LT and International RH vehicles. The connecting rod wrist pin may crack, resulting in connecting rod failure.
Risk and remedy
Risk
Connecting rod failure can cause an engine shutdown, increasing the risk of a crash.
Remedy
Dealers will install new knock detection software to warn the driver prior to engine connecting rod failure, and replace connecting rods as necessary, free of charge. Owner notification letters were mailed February 24, 2023. Owners may contact Navistar's customer service at 1-800-448-7825. Navistar's number for this recall is 22518.
Navistar, Inc. (Navistar) is recalling certain 2018-2021 International LoneStar and 2016-2021 International LT vehicles. The cables that connect the batteries to the vehicle frame may become excessively hot, and in some cases, cause battery post separation.
Risk and remedy
Risk
Excessively hot battery ground cables may cause personal injury during battery maintenance repairs. In addition, a battery post that separates from the battery can result in an engine stall without warning, increasing the risk of a crash.
Remedy
Dealers will replace the alternator positive and ground cables, and relocate the alternator ground to the starter, free of charge. Owner notification letters are expected to be mailed September 26, 2022. Owners may contact Navistar's customer service at 1-800-448-7825. Navistar's number for this recall is 22516.
Navistar, Inc. (Navistar) is recalling certain 2018-2023 International LT vehicles equipped with a 1500W Purkeys inverter system. The positive battery cable may be incorrectly routed, causing it to chafe on the side skirt frame and become damaged.
Risk and remedy
Risk
A damaged battery cable can cause an electrical short, increasing the risk of a fire.
Remedy
Dealers will replace any damaged battery cables and install new inverter cable brackets and saddles, free of charge. Owner notification letters were mailed May 16, 2022. Owners may contact Navistar customer service at 1-800-448-7825. Navistar's number for this recall is 22507.
Navistar, Inc. (Navistar) is recalling certain 2019-2021 International LT and RH trucks. The wrist pin may crack and cause connecting rod failure.
Risk and remedy
Risk
Connecting rod failure may cause a stall, increasing the risk of a crash.
Remedy
Navistar will notify owners and dealers will install a detection system software to warn the driver prior to engine connecting rod failure and engines with a defective connecting rod will be repaired, free of charge. Vehicles previously repaired under Recall 20V255 that received only a software update will need to return to the dealer for the new remedy. Owner notification letters were mailed on June 11, 2021. Owners may contact Navistar customer service at 1-800-448-7825. Navistar's number for this recall is 21505.
Navistar, Inc. (Navistar) is recalling certain 2021 International LT and International RH vehicles. The spring inside the spring brake chamber may allow the pressure plate to shift and wear a hole through the diaphragm.
Risk and remedy
Risk
A hole in the diaphragm may cause an air leak, causing the parking brake to engage and increasing the risk of a crash.
Remedy
Navistar will notify owners, and dealers will inspect and, as necessary, replace the spring brake chambers, free of charge. Owner notification letters were mailed on May 28, 2021. Owners may contact Navistar customer service at 1-800-448-7825. Navistar's number for this recall is 21502.
Navistar, Inc. (Navistar) is recalling certain 2021 International LT, RH, MV, and HV vehicles equipped with Bendix pressure switches. A retainer was not properly seated in the SC-3 single check valve and may not provide source air isolation when pressure is applied. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle…
Risk and remedy
Risk
Unintended spring brake application may occur, increasing the risk of a crash.
Remedy
Navistar will notify owners, and dealers will replace the SC-3 check valves, free of charge. Owner notification letters were mailed on May 28, 2021. Owners may contact Navistar customer service at 1-800-448-7825. Navistar's number for this recall is 21503.
Navistar, Inc. (Navistar) is recalling certain 2021 International LT vehicles equipped with a Cummins X15 engine. The capscrews that attach the flywheel to the crankshaft may have been improperly torqued, allowing the flywheel to detach.
Risk and remedy
Risk
A detached flywheel can cause loss of drive power, increasing the risk of a crash. Additionally, driveline pieces may be ejected from the engine compartment, increasing the risk of injury.
Remedy
Navistar will work with the engine manufacturer Cummins Inc. to notify owners, and Cummins dealers will properly tighten the capscrews and inspect for possible damage, repairing any damage found, free of charge. The recall began on March 29, 2021. Owners may contact Navistar customer service at 1-800-448-7825.
Navistar, Inc. (Navistar) is recalling certain 2018-2021 International LoneStar and 2017-2021 International LT vehicles. The battery ground cable ring terminal at the frame connecting point may break, resulting in a loss of electrical power and unintended engine shutdown without warning.
Risk and remedy
Risk
An unexpected engine shutdown can increase the risk of a crash.
Remedy
Navistar will notify owners, and dealers will replace the battery ground cable, free of charge. The recall began on April 16, 2021. Owners may contact Navistar customer service at 1-800-448-7825. Navistar's number for this recall is 21501.
Owner complaints
3 complaints1 involved a crash2 injuries
What owners report most
Latest complaints
- Electrical system › Instrument panel › Speedometer/odometer
Odometer Fraud. The contact sold a 2021 International LT625. The contact stated that he was a car dealer who had sold the vehicle and several other vehicles to a fleet dealer. The vehicles were a dealer sale. At the time of sale, the vehicles had approximately 600,000 miles; however, the fleet…
Odometer Fraud. The contact sold a 2021 International LT625. The contact stated that he was a car dealer who had sold the vehicle and several other vehicles to a fleet dealer. The vehicles were a dealer sale. At the time of sale, the vehicles had approximately 600,000 miles; however, the fleet dealer currently listed the vehicle and the other vehicles for sale, showing 300,000 miles. The contact confirmed through VINs and pictures posted on the fleet dealer's website and Facebook Marketplace that the listed vehicles were the exact same vehicles the fleet dealer had purchased from the contact.
- Forward collision avoidance › Adaptive cruise control · Forward collision avoidance › Automatic emergency braking · Service brakes
The brake assist malfunctioned causing the brakes to abruptly stop without cause or warning. When the braking system abruptly stopped it caused a jack knife and lost of a trailer on a congested highway with vehicles in all lanes, I was able to finally get control of the tractor with out causing…
The brake assist malfunctioned causing the brakes to abruptly stop without cause or warning. When the braking system abruptly stopped it caused a jack knife and lost of a trailer on a congested highway with vehicles in all lanes, I was able to finally get control of the tractor with out causing contact or injury with other vehicles and the rear trailer broke free and rolled back and landed in the grass that divided the highways. I injured myself and had to have surgery. The tractor was taken to a shop 4 days after the accident. They found that the module for abs ec80 had blocked radar and data link faults for camera, radar & camera was not properly installed. Rush truck center told the company that they needed to drive tractor on a long drive to recreate issues, but the company denied to go forward and picked the tractor up.
- Engine · Fuel/propulsion system · Structure › Body
I drive tractor trailer for JB Hunt. Over the last 4 Years, the three trucks I have been assigned to have had exhaust leaks that vented into the cab. One was a Freightliner (approx 2017 model), and two have been Internationals. These exhaust leaks caused me medical problems, requiring that I…
I drive tractor trailer for JB Hunt. Over the last 4 Years, the three trucks I have been assigned to have had exhaust leaks that vented into the cab. One was a Freightliner (approx 2017 model), and two have been Internationals. These exhaust leaks caused me medical problems, requiring that I take off time unscheduled. The last three trucks I have been assigned to have had exhaust leaks into the cab. Some leaks I only found with a thermal camera. The exhaust leaks are not the main problem. The problem is that design of these trucks cause any leaking engine gases to be pushed into the cab of the truck, mostly through the air conditioning/heater vents. I have tested this. I zip tied a can of orange air freshener under the hood. The can was positioned in such a way as to point away from the air intake box, toward the back of the engine. When driving at highway speed, the orange air freshener was very strong coming into the cab from the a/c vents. The truck is supposed to be getting the fresh air from outside the truck, and forward of where the air freshener was spraying. I originally thought the only problem was that the cabin air intake box is located under the hood, in immediate proximity to all of the leaks. This in itself is a poor design. Even with duct tape over the openings into the cabin air box, any gases (or air freshener) is immediately pulled into the cab through the a/c and heat. I have no idea how this occurs. The design of the trucks allows any leaking gases under the hood to come directly into the cab. This applies to Freightliners and Internationals. They have the same basic design, and by experience I can say that both perform the same way. The hoods on both truck makes are designed with dedicated pathways to provide pure outside air for the intake of the ENGINE. The air provided to the driver comes from an unsealed airbox located under the hood. The main problem is not the leaks but that they get vented into the driver's cabin. The engine crankcase ventilation pours large volume
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.
- 11008341This article will call out those VINs that are equipped with the shim, and if and when the shim should be used as a field repair solution.
- 11008340This document is used to help guide through fault codes.
- 11006684This document will guide the user on the available part kits for servicing A/C system in the event of severe failure.
- 11006679This document will guide the user how to addresses chassis lean conditions on all chassis.
- 11006676This document will guide the user how to properly diagnose or repair a truck equipped with a Sheppard's steering gear with Auto Relief Plungers.
- 11006669This document will guide the user through relocating the No-Idle system's voltage sense source from the battery to the interior sleeper PDM.
- 11005536The purpose of this document is to guide a user to resolve fault code 285 & 286 for Cummins engines.
- 11002889This document will provide the user with cleaning options and procedures for aluminum bright work parts that become stained or tarnished.
- 11002844This document will guide the user through various field repairs to eliminate the squeaks, rattles knocking of the engine hood on International LTs and RHs
- 11000886Update to International Preventative Maintenance
- 11000884This document will guide the user on what to do when they receive a fault code after programming an ECM on A 26A engines
- 10254008Certain International vehicles built with A26 engines does meet the emission requirements for J1939-Stationary Test
- 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.
- 10251416LT & RH aftertreatment PDM F2 fuse falling out or cracking.
- 10251414Starter Diagnostics and warranty claim procedure; all engines EXCLUDING Cummins ISB engine with Allison transmission or PSI engine.
- 10249783A26 & S13 Fuel Gelling
- 10248308Aftertreatment PDM F2 fuse falling out or cracking.
- 10248306Corroded TPMS Receiver / Repeater Module Connectors; only models equipped with feature code 16VLS or 16VVM
- 10248304Certain LT and RH series trucks with Lane Keep Assist (LKA) may have outdated software in the LKA Electronic Control Unit (ECU), resulting in false positive fault codes. A software update will resolve this issue.
- 10246233Tire Pressure Monitoring system; Feature Codes 16VLS, 16VUY, 16VVA, 16VVM, or 16VUZ
- 10246231J1939 Data Link Source Address Information
- 10244931Endurant Plumbing Retrofit; only models built with endurant transmission built before 11/01/2023
- 10244926Rebuilding Cylinder Heads on Certain MaxxForce 11/13, N13, and A26 engines; 2010 to present.
- 10244924A26 and S13 Fuel Gelling; only vehicles equipped with International A26 or S13 engines
- 10244920No Idle HVAC run time shorter than expected - Bregstrom; Only Sleeper cab models with feature code 16UZL or 16VLN.
- 10243610How to request a horsepower quote; all International and Cummins engines
- 10243596General Wheel Speed Sensor Troubleshooting
- 10243595Diagnosis of chassis wander complaints.
- 10241555J1939 Data Link Source Address Information
- 10241554J1939 Data Link Troubleshooting
- 10240196Potential A/C Compressor Parts shortage - 4158126C1 (A/C compressor)
- 10240193Snap-On torque wrench requirement for all big bore engine connecting rod bolts; A26, MaxxForce 13, N13 engines
- 10238861Removal and Installation of the Air Cleaner Assembly Cover and Air Filters; All Engines and only HX and LT series trucks with feature code 012VCB or 012VBZ Air Cleaner Assembly
- 10238860Fifth Wheel Unlock - Trailer Lamp Detection Calibration. Only models equipped with BCM feature code 597017
- 10238858QLS Emergency Calibration Revert Process
- 10238857This Emissions Recall applies to truck models for which, per agreement with EPA and CARB, Navistar, Inc. provided an emergency calibration for International A26 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.
- 10237479N2 telematics module not communicating with OCC systems. Only models built with feature codes 10ADT, 10AEY, 10AEU, 10AEZ, 10AGB, or 10AGC built from 04/04/2019 through 11/01/2022.
Every International LT model year
Bars are owner complaints, dots mark years with recalls. Select a year to open its report.