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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

Bulletins, newest first
IK12010982018-07-16. Service bulletin. ENGINE AND ENGINE COOLING. LT EGR Core Removal and Insertion on MaxxForce 11, 13, and N13 engines
IK08004122018-05-29. Service bulletin. ELECTRICAL SYSTEM; EXTERIOR LIGHTING:HEADLIGHTS. Headlight Operation and Troubleshooting; only Post 2007 Vehicles Built with a Body Controller
IK08004112018-05-29. Service bulletin. ELECTRICAL SYSTEM. Body Controller Resource Center
REC165092018-04-02. Service bulletin. ENGINE AND ENGINE COOLING. Engine software On Board Diagnostic (OBD) issues will be corrected which will aid in engine malfunction identification and proper diagnosis.
REC145082018-04-02. Service bulletin. SERVICE BRAKES. The mounting bolts that fasten the air disc brake caliper to the caliper anchor plate may have not been tightened to their specified torque; only with air disc brake feature codes 04WEY, 04WEZ, or 04WZK.
MIN141092018-04-02. Service bulletin. STEERING. Front Steer Axle U-bolt Washer Replacement
IK13000552018-04-02. Service bulletin. POWER TRAIN:MANUAL TRANSMISSION. Transmission Upshifting too Fast; Only with Allison Gen 4 LCT (1000 and 2000 series) Transmission
IK13000382018-04-02. Service bulletin. POWER TRAIN:MANUAL TRANSMISSION. Transmission Control Module Relocation; only with Allison WT Gen 3 Transmission
IK08005222018-04-02. Service bulletin. EXTERIOR LIGHTING:HEADLIGHTS. Repair Information for Damaged Headlight Connector
IK08003742018-04-02. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. To Get A Helios Capture; All 1939 and 1708 multiplexed trucks only
IK08000802018-04-02. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. J1939 Data Link Troubleshooting; Only Models with 250k Baud Data Link (Black 9 Pin Diagnostic Connector)
IK08004852018-04-02. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. Cluster Software Update Instructions
IK08000802018-04-02. Service bulletin. EQUIPMENT:ELECTRICAL. J1939 Data Link Troubleshooting
IK08005462018-04-02. Service bulletin. ENGINE AND ENGINE COOLING. HVAC fault 2609-19 with 4th Gen BCM; Only models equipped with 4th generation BCM
IK07000972018-04-02. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM; ENGINE AND ENGINE COOLING:ENGINE:DIESEL. NEW Ultrasonic DEF Tank Sending Unit; only models with SCR Aftertreatment system.
IK07000962018-04-02. Service bulletin. ELECTRICAL SYSTEM. Urea Quality Sensor (UQS) Supplemental Diagnostic and Service Information; only models with SCR Aftertreatment system and N9, N10, N13, A26 or Cummins ISB, ISL, ISX engines built from January 2016
MIN171132018-04-02. Service bulletin. SUSPENSION:MULTIPLE AXLE:TORQUE ARM; ENGINE AND ENGINE COOLING:ENGINE:OTHER FUEL TYPES:TURBO/SUPERCHARGER. The retaining nut securing the turbocharger oil supply line may not be tightened to its specified torque.
IK09001212018-04-02. Service bulletin. ENGINE AND ENGINE COOLING. HVAC line rub; only models equipped with Cummins ISB series engines and stationary grille feature code 009HBM
IK08005222018-04-02. Service bulletin. EXTERIOR LIGHTING:HEADLIGHTS. Repair Information for Damaged Headlight Connector
IK05000592018-04-02. Service bulletin. STEERING. Steering Noise in Vehicles Equipped with Dual Steer; Only models equipped with dual steering gear
IK08000802018-04-02. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. J1939 Data Link Troubleshooting
IK07000792018-04-02. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. SCR Vehicles Setting 3363-16 (FC1713) due to Crossed DEF Tank Coolant Lines or Inverted DEFTHV
IK25005112018-04-02. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. Using Supplier Software to Check DTCs
IK13001622018-04-02. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES. Transmission Cooler Line Routing; Only models built Prior to November 29, 2017 with Cummins ISL engine
IK08000592018-04-02. Service bulletin. EXTERIOR LIGHTING:BRAKE LIGHTS. Brake Lights Staying On

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