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Service bulletins for the 2015 International Workstar

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

254 on file from NHTSA, as of 2026-10-19.

By type

By component

Only bulletins with component: Engine are shown. Show all

Bulletins, newest first
IK26002562026-02-05. Service bulletin. ENGINE. This article is intended to provide information for how to program International Engines that have been sold to another company and installed in a chassis that does NOT have an International VIN Number. This may include Detroit Series 40 engines, Perkins, Street Sweepers, Cranes, Fire Trucks, Generators, Blower motors, and more.
IK26002552026-02-05. Other. ENGINE. 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.
IK26000902026-02-05. Other. ENGINE. New CARB Idle Reduction Change Request
IK26000472026-02-05. Service bulletin. ENGINE. Engine replacements for all International engines will need to follow this procedure.
IK080004032024-05-02. Service bulletin. ENGINE AND ENGINE COOLING. This document details the procedure that must be followed to ensure proper alternator troubleshooting.
IK08004072024-03-06. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM. Starter Diagnostics and warranty claim procedure; all engines EXCLUDING Cummins ISB engine with Allison transmission or PSI engine.
IK12014762023-11-06. Service bulletin. ENGINE AND ENGINE COOLING. Rebuilding Cylinder Heads on Certain MaxxForce 11/13, N13, and A26 engines; 2010 to present.
IK26000692023-10-05. Service bulletin. ENGINE AND ENGINE COOLING. How to request a horsepower quote; all International and Cummins engines
IK12014572023-10-05. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. Cummins B6.7 Grid Heater Relay
235122023-10-05. Service bulletin. ENGINE AND ENGINE COOLING. Certain International® N13 engines may be noncompliant to the required On Board Diagnostics (OBD) Monitor, Manufacturer’s Self-Test (MST) for over-boost, Exhaust Gas Recirculation (EGR) low flow, and EGR high flow monitors. Under certain conditions, this noncompliance may result in the failure to detect an increase in regulated air pollutants.
IK12013912023-08-02. Service bulletin. ENGINE AND ENGINE COOLING. Snap-On torque wrench requirement for all big bore engine connecting rod bolts; A26, MaxxForce 13, N13 engines
IK12014662023-06-06. Service bulletin. SERVICE BRAKES, AIR; ENGINE AND ENGINE COOLING. 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
IK12014662023-05-09. Service bulletin. ENGINE AND ENGINE COOLING; SERVICE BRAKES, AIR. New Air compressor Incorporates an oil feed dowel O-ring; only models built with MaxxForce 11/13, N13, or A26 Engines
IK12014762023-04-07. Service bulletin. ENGINE AND ENGINE COOLING. Rebuilding cylinder heads on certain EPA 2010 MaxxForce 11/13, N13, and A26 Engines
IK12001012023-04-07. Service bulletin. ENGINE AND ENGINE COOLING. Cummins Programming guide and fault codes285 & 265; only vehicles built with Cummins B6.7, X15, or L9 engines
IK08004072023-04-07. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM. Starter diagnostics and warranty claim procedure for all engines and all chassis EXCLUDING vehicles equipped with PSI engines or Cummins ISB engine with Allison transmissions
IK12014762023-03-07. Service bulletin. ENGINE AND ENGINE COOLING. Rebuilding Cylinder Heads on Certain International MaxxForce 11/13 engines and all International N13 and A26 engines
IK12012372022-12-07. Service bulletin. ENGINE AND ENGINE COOLING. Turbocharger oil supply tube retrofit; only models with 2010 emissions MaxxForce 11 and 13 engines and N13 engines
IK12014722022-10-05. Service bulletin. ENGINE AND ENGINE COOLING. Pico Scope CCOS (Crankcase Separator Test)
IK12014692022-09-07. Service bulletin. ENGINE AND ENGINE COOLING. PicoScope Test One Channel RCT
IK12014642022-01-06. Service bulletin. FUEL SYSTEM, DIESEL; ENGINE AND ENGINE COOLING. High Pressure Fuel Pump external leaks from weep hole. only trucks with 2010 MaxxForce 11/13L, all N13, or A26 engines
IK08000742021-12-07. Service bulletin. ENGINE AND ENGINE COOLING; VEHICLE SPEED CONTROL. Dual Drive Cab Throttle Position Harness for APS/IVS throttle pedals; only models with both left hand and right hand drive.
IK26002512021-11-03. Service bulletin. ENGINE AND ENGINE COOLING. How to obtain As built parameter list
IK12014582021-10-02. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT; ENGINE AND ENGINE COOLING. Oil leaks at the Bottom of the Oil Filter Module; Only International A26, N13, or 2010 and newer 11 and 13 engines
IK12012992021-10-02. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT ADAPTIVE/MOBILITY. Engine Oil Capacities. All International electronic engines 1994 to present and Cummins ISB, ISM, or ISX engines

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.