IK1201526
Service Bulletin/Repair Instructions
This document will guide the user through the parts and information related to A26B resonator removal and EGR cross-over tube installation.
Vehicle report
2021 INTERNATIONAL HV
Service bulletins
119 bulletinsTechnical service bulletins are instructions a manufacturer sent its dealers about a known fault. They are not recalls and the work is usually not free, but they are the clearest signal of a problem the manufacturer already knows about.
IK0800560
Service Bulletin/Repair Instructions
This document will guide the user through the changes of the dielectric grease/coatings used in certain areas on all International vehicles built after 1/8/2018. International's Electrical Engineering Team made this change to improve the longevity of the OEM coatings and to improve applications at the factory.
26101
Service Campaign
Certain International® trucks and IC BusTM CE Series buses may have out of date BCM programing that may cause erroneous fault codes after a vehicle sits for 2 or 3 days.
IK1201516
Service Bulletin/Repair Instructions
This document will guide the user through parts information and installation instructions for the IMP Isolation Kit.
IK2600255
Service Bulletin/Repair Instructions
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 greenhouse gas (GHG) regulations.
IK0800684
Service Bulletin/Repair Instructions
This document is to inform dealers, customers, and body builders/TEMs of a known BCM software issue with kernels 747 through 752. Units built after November of 2024 as well as older units that were updated with DLB between 11/5/2024 and 6/26/2025 with Remote Power Modules (RPM) modules, can experience loss of RPM functionality as well as other electrical system concerns. Kernel 753 was released to DLB on 6/26/2025 to address these concerns.
IK2600090
Other
New CARB Idle Reduction Change Request
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 automatically with no manual action required. The program presents results in an interactive table that shows feature codes, descriptions, access levels, and whether each feature is present in each selected file. Built-in search, filtering, and sorting make it easy to locate specific features or focus only on differences between files. Column visibility can be customized to show or hide descriptions and access information as needed. Users can remove files individually or clear all files at once, with results updating instantly. The tool also includes reporting and export options that reflect exactly what is visible on screen, allowing results to be printed, copied, saved as text, or exported to CSV for use in Excel or other spreadsheet tools. Overall, the program streamlines the process of comparing vehicle feature configurations, helping users quickly identify differences, validate setups, and document results without manual comparison or external tools.
IK2600047
Service Bulletin/Repair Instructions
Engine replacements for all International engines will need to follow this procedure.
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.
IK2600279
Service Bulletin/Repair Instructions
This document provides: Steps to take when switch pack programming fails, or when switch pack disappears after body control module update Sample scenarios Additional information to assist readers in understanding DLB switch pack programming
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.)
IK0800689
Service Bulletin/Repair Instructions
In some instances, the driver's or passenger's door pod may become unresponsive, where it will not respond to any manual inputs from the driver or passenger. In some of these situations, it is possible for this symptom to be present without any fault codes becoming active. This article will guide the user through performing a hard reset of a door pod, which can restore the door pod to its operational condition, thereby avoiding the need for replacement. The steps in this article should be performed BEFORE diagnostics are completed for any active faults.
IK1201009
Service Bulletin/Repair Instructions
In some geographic areas, ambient temperatures reaching below 15°F (-10 °C), including high levels of humidity, an operator may experience engine stalling, low performance, and or poor aftertreatment performance. This is caused by condensation accumulating and freezing within the Charge Air Cooler (CAC); affecting air flow into the engine. This article lists all the currently available winter front covers that can be installed on the front grille and bumper to reduce cold air flow to the engine compartment.
IK0800688
Service Bulletin/Repair Instructions
This document is to notify the field of an issue with BCM that causes various electrical system concerns after the vehicle sits for 2-3 days. This can affect all LT, RH, MV, HV models, 2021MY and up HX, 2024MY and up CE Bus with BCM kernel version 752, 753, and 754. Vehicles built or updated with DLB between 6/1/25 and 11/4/25 are suspected of having these kernels installed on the BCM. The most common complaint is that the steering wheel switches do not function, which, depending on the vehicle model and options, can cause the bus door, pupil warning lights, radio controls, marker interrupt, and cruise control to stop working. Other complaints can include short circuit faults from multiple sensor circuits attached to the BCM setting at the same time, the vehicle will not go into gear, the headlights are stuck on, the brake lights are stuck on, or the parking brake alarm is sounding (horn chirping) with the parking brake set. As of 11/4/25, these symptoms can be resolved by updating the BCM to kernel 755 or later with DLB.
IK3400001
Service Bulletin/Repair Instructions
Title: Service Portal iKNow Feedback Case Types Applies To: All
IK1400005
Service Bulletin/Repair Instructions
Title: Driveline Information Center and Troubleshooting Procedures Applies To: All Vehicles
IK1900022
Service Bulletin/Repair Instructions
Title: A/C Refrigerant and Oil Capacities Applies To: All current models
IK0900157
Service Bulletin/Repair Instructions
Title: Fan belt replacement guidelines for frayed edges Applies To: All Models
IK1200716
Service Bulletin/Repair Instructions
Title: Engine Emission Label Replacement, Certificate of Conformance and Clean Idle Sticker Addition Procedure Applies To: All Navistar Powered Trucks Requesting Engine Emission Label Replacement, Certificate of Conformance and/or Clean Idle Sticker, Clean Truck Check
IK1201519
Service Bulletin/Repair Instructions
Title: Replacing the Crankshaft Gear on S13 Engines
IK0500054
Service Bulletin/Repair Instructions
Title: Steering Gear Seal Repair Guidelines Applies To: Steering gears
IK2600069
Service Bulletin/Repair Instructions
Title: How to Request a Horsepower Quote Applies To: All International and Cummins Electronic engines
IK1201511
Service Bulletin/Repair Instructions
Title: Supplemental A26 MAF Fault Diagnostics Applies To: All A26 Engines
IK0300078
Service Bulletin/Repair Instructions
This document reminds technicians of the critical relationship between the truck's suspension and the driveline operating angles. The information applies to diesel, gas, and electric vehicles.
IK0900156
Service Bulletin/Repair Instructions
Title: Connecting an Auxiliary APU to the S13 Coolant System
IK1400023
Service Bulletin/Repair Instructions
This 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.
iK1200101
Service Bulletin/Repair Instructions
The purpose of this document is to guide a user to resolve fault code 285 & 286 for Cummins engines.
iK1500095
Service Bulletin/Repair Instructions
This document will provide the user with cleaning options and procedures for aluminum bright work parts that become stained or tarnished.
IK0400037
Service Bulletin/Repair Instructions
This document is to guide users to eliminate brake pedal rattle noise.
IK08000403
Service Bulletin/Repair Instructions
This document details the procedure that must be followed to ensure proper alternator troubleshooting.
VER 23521
Service Bulletin/Repair Instructions
Certain International vehicles built with A26 engines does meet the emission requirements for J1939-Stationary Test
IK0200025
Service Bulletin/Repair Instructions
This document will guide the user to inspect oil pan for any sign of damage that could potentially be created by the front axle set screw
IK0800407
Service Bulletin/Repair Instructions
Starter Diagnostics and warranty claim procedure; all engines EXCLUDING Cummins ISB engine with Allison transmission or PSI engine.
IK0800503
Service Bulletin/Repair Instructions
Cummins ISB Starting system diagnostics.
IK1201406
Service Bulletin/Repair Instructions
A26 & S13 Fuel Gelling
IK0800351
Service Bulletin/Repair Instructions
J1939 Data Link Source Address Information
IK1600260
Service Bulletin/Repair Instructions
Tire Pressure Monitoring system; Feature Codes 16VLS, 16VUY, 16VVA, 16VVM, or 16VUZ
IK1201476
Service Bulletin/Repair Instructions
Rebuilding Cylinder Heads on Certain MaxxForce 11/13, N13, and A26 engines; 2010 to present.
IK1300192
Service Bulletin/Repair Instructions
Endurant Plumbing Retrofit; only models built with endurant transmission built before 11/01/2023
IK0300010
Service Bulletin/Repair Instructions
Diagnosis of chassis wander complaints.
IK0400040
Service Bulletin/Repair Instructions
General Wheel Speed Sensor Troubleshooting
IK1201457
Service Bulletin/Repair Instructions
Cummins B6.7 Grid Heater Relay
IK1300189
Service Bulletin/Repair Instructions
HV Enhanced transfer case cooling up-fit
IK0800657
Service Bulletin/Repair Instructions
Starter kicks out after 1 second on MV and HV with Cummins L9 Engines
IKo800080
Service Bulletin/Repair Instructions
J1939 Data Link Troubleshooting
IK1201391
Service Bulletin/Repair Instructions
Snap-On torque wrench requirement for all big bore engine connecting rod bolts; A26, MaxxForce 13, N13 engines
IK0800652
Service Bulletin/Repair Instructions
Fifth Wheel Unlock - Trailer Lamp Detection Calibration. Only models equipped with BCM feature code 597017
IK0700120
Service Bulletin/Repair Instructions
QLS Emergency Calibration Revert Process
22501
Service Bulletin/Repair Instructions
This 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.
IK1201466
Service Bulletin/Repair Instructions
New air compressor incorporates an oil feed dowel O-ring. Only models equipped with 2010 and newer MaxxForce 11/13 engines, all N13, and A26 engines
IK0700122
Service Bulletin/Repair Instructions
HV Exhaust Side Step Heat Shield Latching Area Cracking
IK0800655
Service Bulletin/Repair Instructions
N2 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.
22502
Service Bulletin/Repair Instructions
Per 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.
23110
Service Bulletin/Repair Instructions
Certain HV 4X4 series trucks built with two-piece driveline may experience vibration when driving at highway speed.
IK1201480
Service Bulletin/Repair Instructions
Cummins B6.7 and L9 engines with codes 285 and 286
23105
Service Bulletin/Repair Instructions
Certain HV, HX, LT, and RH Series trucks may have incorrect idle shutdown programmable parameters. Updating the programmable parameters will address this concern.
IK1200101
Service Bulletin/Repair Instructions
Cummins Programming guide and fault codes285 & 265; only vehicles built with Cummins B6.7, X15, or L9 engines
IK0800554
Service Bulletin/Repair Instructions
Telematics installation guidelines - Only units with 500K data link
22903
Service Bulletin/Repair Instructions
The Proposition 65 and/or DEF warning light labels may not have been installed at time of vehicle manufacture.
IK1201473
Service Bulletin/Repair Instructions
Service Diagnostic Software (SDS) Template to enable Recall 22518 connecting rod knock detection software. Only vehicles with International A26 Engine
IK1201477
Service Bulletin/Repair Instructions
Installation of the 7104674C92 Engine Sensor Harness on 2021 and Newer International A26B engines.
IK0700115
Service Bulletin/Repair Instructions
QLS Emergency ECM Calibration; only models equipped with Cummins B6.7, X15, L9, or International A26 engines
22518
Service Bulletin/Repair Instructions
The connecting rod bushing over time may develop cracks or lose chunks of material, which could lead to connecting rod failure. Only models with A26 engine.
22118
Service Bulletin/Repair Instructions
These certain trucks may have incorrect ECM programming in make and model programmable parameter. Only models built with 2021 model year A26 engines.
IK1201472
Service Bulletin/Repair Instructions
Pico Scope CCOS (Crankcase Separator Test)
IK0800605
Service Bulletin/Repair Instructions
PicoScope Test 5V & 12V Intermittent Open and Short circuit diagnostics
IK0800607
Service Bulletin/Repair Instructions
PicoScope Test - Battery Loss of Charge - Parasitic Draw Test
IK0800609
Service Bulletin/Repair Instructions
PicoScope Test for Datalink (CAN) Health Shorts & opens
IK0800610
Service Bulletin/Repair Instructions
PicoScope Test Resistance and Ohmmeter
IK1201469
Service Bulletin/Repair Instructions
PicoScope Test One Channel RCT
22504
Service Bulletin/Repair Instructions
Under certain conditions, the Engine Control Module (ECM) programming may not detect when the Exhaust Gas Recirculation (EGR) flow exceeds the predetermined threshold resulting in not setting a fault code and activating the Malfunction Indicator Light (MIL). Only models equipped with International A26 engine.
22902
Service Bulletin/Repair Instructions
The Body Control Module (BCM) may have outdated software that could result in active Over The Air (OTA) programming to not fully complete and result in an inoperative Engine Control Module (ECM). Only models with International A26 engine and feature code 10ADT, 10AEK, 10AEU, 10AEY, 10AEZ, 10AGB, or 10AGC (Telematics Communications Module).
IK1600145
Service Bulletin/Repair Instructions
Front cab mount bushings/insulators MV, HV, DuraStar, and WorkStar vehicles used in severe vocations
IK1201440
Service Bulletin/Repair Instructions
International A26 engine fuel delivery pressure sensor and harness pigtail eliminated
IK1600131
Service Bulletin/Repair Instructions
Cab water leak trouble shooting tips
22112
Service Bulletin/Repair Instructions
Certain HV series trucks may have a fuse panel graphic with no fuse rating for Heated Drain Valves (HDV) when vehicles are equiped with more than one HDV.
IK1600251
Service Bulletin/Repair Instructions
Water leaks past plastic vapor barrier sheet in the inner cavity of the cab entry door
IK1201460
Service Bulletin/Repair Instructions
Installing P/N 7104373C91 A26 Engine Sensor Harness
IK1201465
Service Bulletin/Repair Instructions
2021 A26 Low Power In Cold Climates
IK1201464
Service Bulletin/Repair Instructions
2021 A26 low power in cold climates. Only vehicles equipped with A26 engine
21114
Service Bulletin/Repair Instructions
Driveline vibration and reduced driveline performance may occur due to incorrect rear axle pinion angles. Only models built with 6X6 configuration.
IK0800080
Service Bulletin/Repair Instructions
J1939 Data Link Troubleshooting
IK1000003
Service Bulletin/Repair Instructions
Power Steering Diagnostics Flow / Pressure Specifications For Power Steering Gears and Power Steering Pumps
IK1300086
Service Bulletin/Repair Instructions
Bendix Stability control - customer satisfaction performance improvement; Specific Emergency / Tanker applications only.
IK2600251
Service Bulletin/Repair Instructions
How to obtain As built parameter list
IK2600254
Service Bulletin/Repair Instructions
New or replacement body control Module (BC,BCM) not detected; Gen 4 BCM
21901
Service Bulletin/Repair Instructions
The Environmental Protection Agency (EPA) and California Air Resources Board (CARB) have approved an emergency calibration to provide temporary relief from the global supply shortage of electrical components. When there is a communication fault in the DEF head unit / Quality Level Sensor (QLS) this temporary calibration will allow the vehicle to operate. The procedure in this document will include diagnosing the DEF head unit / QLS and if found to be defective will advise to install the temporary engine calibration if replacement parts are not available. Any vehicle that receives this calibration will be required to have it removed and a new QLS installed once parts become available, this will be managed through future communication.
IK1201299
Service Bulletin/Repair Instructions
Engine Oil Capacities. All International electronic engines 1994 to present and Cummins ISB, ISM, or ISX engines
IK1201458
Service Bulletin/Repair Instructions
Oil leaks at the Bottom of the Oil Filter Module; Only International A26, N13, or 2010 and newer 11 and 13 engines
21105
Service Bulletin/Repair Instructions
Certain International LT, HV and RH Series trucks may have the incorrect EGRV mounting bolts installed.
CSR 519
Service Bulletin/Repair Instructions
Altec Industries, Inc. has received notification from Navistar that a condition exists relating to motor vehicle safety, compliance, or emissions in a vehicle equipped with Altec equipment. Navistar has decided that a non-compliance that relates to motor vehicle safety exists in certain 2021 HV®, LT®, MV®, and RH® series trucks built from July 28, 2020, through October 2, 2020, with a Bendix air brake system. Contact your International dealer, a Love's Truck Tire Care, or a Speedco location to schedule a service date to perform the recall. Love's and Speedco locations in Texas are not able to perform warranty services. Altec is not able to complete this repair. This repair is not covered under the Altec Warranty policy.
IK0800594
Service Bulletin/Repair Instructions
Lane Departure Warning Alert Active with Turn Signals On; Only models equipped with Lane Departure Warning
IK0700112
Service Bulletin/Repair Instructions
Aftertreatment Clamp Corrosion; Single Can Aftertreatment Systems
IK1201429
Service Bulletin/Repair Instructions
CPA BEAM RCT and Idle Test for A26 engine; only trucks equipped with International A26 engine
21503
Service Bulletin/Repair Instructions
Certain HV, LT, MV, and RH series trucks do not conform to Federal Motor Vehicle Safety Standard (FMVSS) 121 relating to the secondary air brake system.
IK1900259
Service Bulletin/Repair Instructions
Day cab roof air deflector causing loud vibration noise at highway speed
IK0800593
Service Bulletin/Repair Instructions
Radio clock changes time automatically; Only vehicles built after March 2020 and excluding CV
IK0100051
Service Bulletin/Repair Instructions
Frame Rail Straightness Inspection Procedure
IK1400038
Service Bulletin/Repair Instructions
Tridem Axle Oil Temperature Cluster Messages
IK2600128
Service Bulletin/Repair Instructions
A26, N13, and 2010 EPA MaxxForce 11 and 13 engine Auxiliary Programable Parameters
21101
Service Bulletin/Repair Instructions
The deaeration tank may leak coolant.
20510
Service Bulletin/Repair Instructions
On certain trucks equipped with an automatic transmission, if the automatic transmission is still in drive or reverse position and the stationary PTO switch is engaged, the engine RPM will ramp up and may overcome parking brake hold capability resulting in possible vehicle movement.
IK0800590
Service Bulletin/Repair Instructions
Programming Procedure for Center Panel Switch Packs
IK1201444
Service Bulletin/Repair Instructions
1 channel CPA RCT test for A26 or CV 6.6L; Only trucks built with International A26 or 6.6 engines
20114
Service Bulletin/Repair Instructions
Certain International® HV and MV Series trucks, and DuraStar and WorkStar model trucks, the battery ground circuit interconnect cable may have been made with RED insulation instead of BLACK.
IK1201453
Service Bulletin/Repair Instructions
7095496C3 EGR Bellows Heat Shield ID; only models equipped with A26 Engine
IK1500074
Service Bulletin/Repair Instructions
Fuel Filters, Winter Additives, and Blending Fuels for Cummins® Engines
20106
Service Bulletin/Repair Instructions
The upper fan ring shroud support bracket may have been assembled with an insufficient weld between the bracket and its mount which may cause the weld at the bracket to crack.
20508
Service Bulletin/Repair Instructions
Certain MV and HV series trucks do not conform to Federal Motor Vehicle Safety Standard (FMVSS) No. 108 relating to reflective tape missing on back of cab.
IK1600233
Service Bulletin/Repair Instructions
Cab Lean Concern
IK1300186
Service Bulletin/Repair Instructions
Auxiliary Transmission Diagnostics; only models with feature code 0013607 or 0013PNB controlled by DLB feature 0597268
IK1900261
Service Bulletin/Repair Instructions
Bluetooth Cannot Be Connected to Radio
IK0800504
Service Bulletin/Repair Instructions
Repair Procedures for Vehicles Struck by Lightning
IK0800284
Service Bulletin/Repair Instructions
Ambient Air Temperature (AAT) Sensor Faults/Location/Diagnostics
IK4300009
Service Bulletin/Repair Instructions
This document will guide the user through the proper use of the A26 Misfire Detection Session to determine cylinder misfire count releted to the specific misfire DTCs.
IK0800475
Service Bulletin/Repair Instructions
Radio Diagnostics and Information
IK1600250
Service Bulletin/Repair Instructions
Horizon Cab Door Field Replacement and the Side Window Air Deflectors. NOTE: This article will only be applicable to cabs with the deflector mounted on the door pillar. If the cab has the deflector at the windshield, this article does not apply.
IK1600259
Service Bulletin/Repair Instructions
Chrome Plated C-Loop Mirror Flat Glass Cracks
Reading this report
Complaint counts are reports filed with NHTSA, not failure rates. A common model collects more of them than a rare one that breaks more often.