IK1201501
Service Bulletin/Repair Instructions
The purpose of this document is to properly identify and repair a leak at the rear gear housing boss.
Vehicle report
2025 INTERNATIONAL LT
Service bulletins
54 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.
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.
IK1201506
Service Bulletin/Repair Instructions
This document will guide the user through to inspect A26 turbochargers remanufactured by SRC between 05/01/2023 and 02/01/2025. SRC Turbochargers assembled with new compressor housings may have a defect that prevents the TCOT sensor (Part# 1845988C1, Sensor, Exhaust Gas Temp) from being installed correctly.
IK4300031
Service Bulletin/Repair Instructions
This document will provide information regarding certain approved S13 and T14 chemicals.
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Certain International® trucks and IC BusTM CE Series buses may have out of date BCM programing that may cause erroneous fault codes after a vehicle sits for 2 or 3 days.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.
IK1201514
Service Bulletin/Repair Instructions
This document provides instructions for sealing oil leakage past the flywheel bolt holes on S13 engines. Oil leaking from behind the crankshaft gear may exit through the flywheel bolt holes and is often misdiagnosed as a rear crankshaft seal leak. This condition is confirmed by oil-saturated flywheel bolts and visible oil pooling in the flywheel bolt holes behind the gear.
IK2800082
Service Bulletin/Repair Instructions
VIN and Incomplete Vehicle Document Label Replacement Procedure
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.
IK2700129
Service Bulletin/Repair Instructions
This article provides step-by-step guidance for troubleshooting issues with Techline Connect software.
IK1900301
Service Bulletin/Repair Instructions
The purpose of this article is to provide the user with the necessary tools and related manuals to maintain, diagnose, and repair an Espar Hydronic S3 Heater (GEN 3). The Espar Hydronic S3 (GEN 3) Auxiliary Heater is a diesel-fired coolant heater for maintaining cabin heat without running the engine. The heater uses fuel from the fuel tank to heat coolant before it goes to the heater core in the sleeper HVAC unit. The heater is located under the cab's sleeper area and is powered by the vehicle's batteries.
IK0800691
Service Bulletin/Repair Instructions
This document is intended to inform dealers, technicians, parts departments, and customers of a change made to radio software to support updated Collision Mitigation, Lane Departure Warning (LDW), and Blind Spot Monitoring systems. If replacing the radios on the vehicles described below, the radio either needs to be built after a specific build date or have the software version verified/updated. If outdated radio software is used on these vehicles, the audible tones for these systems may not be heard by the driver. The applicable vehicles were all built with the correct radio. This iKNnow article only applies if replacing the radio for a service event in one of the vehicles listed below.
WPL2800152
Warranty Program/Extension
Guide the user on how to submit an oil leak for warranty
IK3100005
Emissions
This article will provide the calibration revision history for S13 Integrated EPA 2024 Powertrains.
IK0800677
Service Bulletin/Repair Instructions
This document is intended to provide supplemental information for concerns with brake light switches and pressure sensors used by the BCM and PIM module to determine if the operator of the vehicle is applying the service brakes. All S13 vehicles are equipped with BCM feature 597483 (BCM PROG, BRAKE SWITCH, Use With Brake Application Pressure Switch).
IK1201505
Service Bulletin/Repair Instructions
This article is to walk through and assist the technician in diagnosing and repairing some of the known leaks around the S13 Integrated Powertrain.
IK1500109
Service Bulletin/Repair Instructions
This document will guide the user through supplemental fuel system diagnostics on 2017 A26 ESN 4500000 - 4599999.
IK2600264
Service Bulletin/Repair Instructions
This document provides instructions for the programming changes that will be needed when performing an S13 engine swap.
IK2600069
Service Bulletin/Repair Instructions
This document will guide the user through troubleshooting steps to submitting a case file for a horsepower request.
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.
IK1300197
Service Bulletin/Repair Instructions
This document will guide the user through T14 Upper Transmission Harness replacement along with TOSS (Transmission Output Shaft Sensor) replacement on select, effected vehicles.
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
IK1201009
Service Bulletin/Repair Instructions
In some geographic areas, ambient temperatures reaching below 40°F (4°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 currently available winter front covers that can be installed on the front grille and bumper to reduce cold air flow to the engine compartment.
IK2600296
Service Bulletin/Repair Instructions
This document aims to enable technicians to: 1. Accurately identify S13 engine control systems. 2. Understand the programming intricacies related to these systems. 3. Autonomously complete programming tasks without needing technical support.
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.
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.
IK1201507
Service Bulletin/Repair Instructions
This document will guide the user through replacement of the two hose clamps at the right rear coolant distribution housing to the large coolant return tube leading to the thermostat housing (Figure #1). The original clamp design may not be adequate to maintain the proper clamping force in the event the rubber hose relaxes. The steps below will outline the installation of a new design constant torque clamp in this location.
IK0400176
Service Bulletin/Repair Instructions
This document will guide the user through quick diagnostic steps for abnormal or sudden air pressure fluctuation when driving S13 T14 Powertrain.
IK1201517
Service Bulletin/Repair Instructions
This document will guide the user through the steps needed to modify the breather tube outlets on S13 engine.
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
IK2501967
Service Bulletin/Repair Instructions
Title: Incorrect Software code for Redundant door control Applies To: Vehicles Marked In Service Porta
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
IK2600262
Service Bulletin/Repair Instructions
Title: Export Recalibration Process & Emissions Label - A26 Applies To: Service Manager, General Manager, Technicians.
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
IK1201509
Service Bulletin/Repair Instructions
Title: S13 New Power Steering Tube Support Brackets
IK0500054
Service Bulletin/Repair Instructions
Title: Steering Gear Seal Repair Guidelines Applies To: Steering gears
IK1900299
Service Bulletin/Repair Instructions
Title: Parameters for 16UZL with 16VKW Applies To: Vehicles with both feature codes 16UZL and 16VKW
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.
IK0800679
Service Bulletin/Repair Instructions
Title: Battery Disconnect Switch Replacement - Best Practices Applies To: All Models with Battery Disconnect Switch
IK0900156
Service Bulletin/Repair Instructions
Title: Connecting an Auxiliary APU to the S13 Coolant System
IK0800672
Service Bulletin/Repair Instructions
Applies To: Units built 12/20/2022 - 11/11/2024 On the following models with Feature Codes: CE Bus- 0510234 LT RH- 001MBS & 0510234 LT RH- 008TRR or 0510234 & 001LRM or 001LRV or 001LRN or 001LRL
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.
IK1600269
Service Bulletin/Repair Instructions
This document will guide users to eliminate the squeaks, rattles or knocking created from the engine hood.
IK1300193
Service Bulletin/Repair Instructions
This document will guide users to setup PTO functionality parameters on the S13/T14 Intergrated Powertrain.
ik0800664
Service Bulletin/Repair Instructions
LT & RH aftertreatment PDM F2 fuse falling out or cracking.
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.