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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
IK12013912021-09-02. Service bulletin. ENGINE AND ENGINE COOLING. Snap-On torque wrench requirement for all big bore engine connecting rod bolt(s).
IK07001122021-07-02. Service bulletin. ENGINE AND ENGINE COOLING. Aftertreatment Clamp Corrosion; Single Can Aftertreatment Systems
IK12014572021-06-03. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. Cummins B6.7 Grid Heater Relay
IK26001282021-04-02. Service bulletin. VEHICLE SPEED CONTROL; ENGINE AND ENGINE COOLING. A26, N13, and 2010 EPA MaxxForce 11 and 13 engine Auxiliary Programable Parameters
205102021-04-02. Service bulletin. ENGINE AND ENGINE COOLING; VEHICLE SPEED CONTROL. 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.
IK15000742020-12-02. Service bulletin. FUEL SYSTEM, DIESEL; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; FUEL SYSTEM, OTHER:FUEL FILTER; ENGINE AND ENGINE COOLING. Fuel Filters, Winter Additives, and Blending Fuels for Cummins® Engines
IK14000052020-09-02. Service bulletin. ENGINE; EQUIPMENT. Driveline Information Center and Troubleshooting Procedures
IK08005042020-09-02. Service bulletin. ELECTRICAL SYSTEM; ENGINE; POWER TRAIN. Repair Procedures for Vehicles Struck by Lightning
IK08002842020-08-04. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT; ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. Ambient Air Temperature (AAT) Sensor Faults/Location/Diagnostics
IK19000222020-07-07. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION. A/C Refrigerant and Oil Capacities
IK12014422020-05-06. Service bulletin. ENGINE AND ENGINE COOLING. 5 gallon SSI DEF level sensor/ multifunction head unit retrofit; only 2014 and 2015 models year built with Navistar N9/N10 engines
IK08003642019-12-03. Service bulletin. ENGINE AND ENGINE COOLING. Stand Alone Real Time (SART) Module Diagnostics. Only 2010 and later models equipped with MaxxForce® 11/13/15 engines or N13 with feature 0508051
IK08002842019-11-05. Service bulletin. ENGINE AND ENGINE COOLING. Ambient Air Temperature (AAT) Sensor Faults/Location/Diagnostics
IK07000972019-11-05. Service bulletin. ENGINE AND ENGINE COOLING. NEW Ultrasonic DEF Head Unit; All SCR vehicles
IK12012992019-10-03. Service bulletin. ENGINE AND ENGINE COOLING. Oil Capacities; All Electronic International Engines 1994 - Present. Cummins ISB, ISM & ISX
IK07000792019-07-02. Service bulletin. ENGINE AND ENGINE COOLING. SCR Vehicles Setting DEF Quality Faults due to Crossed DEF Tank Coolant Lines or Inverted DEFTHV
IK08004842019-06-07. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM. Voltage gauge drops on cold engine start-up; Only models built with Cummins ISB, B6.7, ISL, or L9 engines
IK07000972019-06-07. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM; ENGINE AND ENGINE COOLING. NEW Ultrasonic DEF Head Unit available; Only models equipped with SCR Aftertreatment.
IK07000972019-05-03. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM; ENGINE AND ENGINE COOLING. NEW Ultrasonic DEF Head Unit; Only vehicles Equipped with SCR
K12007162019-04-03. Service bulletin. ENGINE; EQUIPMENT:OTHER:LABELS. Engine Emission Label Replacement, Certificate of Conformance and Clean Idle Sticker Addition Procedure
IK07000972019-04-03. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM; ENGINE AND ENGINE COOLING. NEW Ultrasonic DEF Head Unit; only models equipped with SCR Aftertreatment
IK08005032019-03-04. Service bulletin. ELECTRICAL SYSTEM:STARTER ASSEMBLY; ENGINE AND ENGINE COOLING. ISB Starting System Diagnostics; Only models built with cummins ISB engines
IK19000222018-10-15. Service bulletin. ENGINE. A/C Refrigerant and Oil Capacities
IK12012992018-10-15. Service bulletin. ENGINE. Engine Oil Capacities All Electronic International Engines 1994 - Present. Cummins ISB, ISM & ISX
IK12001012018-08-20. Service bulletin. ENGINE AND ENGINE COOLING. Cummins Programming Guide and Cummins 285 Fault Code; Only pre-2007 models built with Cummins ISM Engine

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