Vehicle report

2025 TRIUMPH TRIDENT 660

Service bulletins

35 bulletins

Technical 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.

COM1-35109

Service Bulletin/Repair Instructions

Dealer notice announcing the availability of Triumph Diagnostic Tool 2026-07 and dealers should begin using it immediately.

COM2 - 34886

Service Bulletin/Repair Instructions

Dealer notice announcing the availability of Triumph Diagnostic Tool 2026-06.1 and dealers should begin using it immediately.

COM5 - 34490

Service Bulletin/Repair Instructions

Dealer notice announcing the availability of Technical Bulletin 264.

COM6 - 34491

Service Bulletin/Repair Instructions

Dealer notice announcing the availability of Triumph Diagnostic Tool version 2026-06 and dealers should begin using it immediately.

TB264

Service Bulletin/Repair Instructions

Technical Bulletin 264 provides instructions that relates to: Triumph Diagnostic Tool - New Motorcycle Connection and Diagnostics Workflow, Triumph Diagnostic Tool - End of Support for Microsoft Windows 10.

COM4 - 34435

Service Bulletin/Repair Instructions

Dealer notice advising the availalbility of TDT version 2026-05.2 which resolves the ABS as Not Connected issues in SmartScan, on Tracker 400 & Thruxton 400 models.

COM02 - 34238

Service Bulletin/Repair Instructions

Dealer notice announcing the availability of Diagnostic software 2026-05.1 and dealers should begin using it immediately.

COM01 - 34227

Service Bulletin/Repair Instructions

Dealer notice reminding of Motorcycle Cleaning, prohibited use of High-Pressure & Steam Cleaning equipment.

COM01 - 33784

Service Bulletin/Repair Instructions

Dealer notice announcing the availability of Diagnostic software 2026-04 and dealers should begin using it immediately.

COM1 - 33480

Service Bulletin/Repair Instructions

Dealer notice announcing the availability of Diagnostic software 2026-03 and dealers should begin using it immediately.

COM2 - 33233

Service Bulletin/Repair Instructions

Dealer notice announcing the availability of Diagnostic software 2026-02 and dealers should begin using it immediately.

COM1 - 32976

Service Bulletin/Repair Instructions

Dealer notice announcing the availability of Diagnostic software 2026-01 and dealers should begin using it immediately.

COM2 - 32716

Service Bulletin/Repair Instructions

Dealer notice announcing the availability of Technical Bulletin 255.

COM1 - 32684

Service Bulletin/Repair Instructions

Dealer notice announcing the availability of Diagnostic software 2025-13 and dealers should begin using it immediately.

COM3 - 32486

Service Bulletin/Repair Instructions

Dealer notice announcing the availability of Diagnostic software 2025-12.1 and dealers should begin using it immediately.

COM2 - 32455

Service Bulletin/Repair Instructions

Dealer notice announcing the availability of Diagnostic software 2025-12 and dealers should begin using it immediately.

TB255

Service Bulletin/Repair Instructions

Technical Bulletin 255 provides instructions that applies to: Triumph Diagnostic Tool - Addition of Pinpoint Test Links to Smart Scan DTC Screen & Triumph Diagnostic Tool - Removal of IUPR Uploader Application

COM1 - 31796

Service Bulletin/Repair Instructions

Dealer notice announcing the availability of Diagnostic software 2025-11 and dealers should begin using it immediately.

31343

Service Bulletin/Repair Instructions

Dealer notice announcing the availability of Diagnostic software 2025-10 and dealers should begin using it immediately.

TB252

Service Bulletin/Repair Instructions

Technical Bulletin 252 provides instructions that applies to: Triumph Diagnostic Tool - ABS Calibration Update and Smart Scan ABS Calibration Version Check Improvement, Triumph Diagnostic Tool - Replacement ABS Modulator Setup - Change to ABS Variant Code Configuration Process

COM2 - 31089

Service Bulletin/Repair Instructions

Dealer notice announcing the availability of Diagnostic software 2025-09.1 and dealers should begin using it immediately.

COM1 - 31039

Service Bulletin/Repair Instructions

Dealer notice announcing the availability of Diagnostic software 2025-09 and dealers should begin using it immediately.

COM5 - 30840

Service Bulletin/Repair Instructions

Dealer notice advising the availability of Diagnostic software version 2025-08 and dealers should begin using it immediately.

COM3 - 30807

Service Bulletin/Repair Instructions

Dealer notice advising of Dealer TOL platform impacting the latest Diagnostic software download - logging off.

COM2 - 30768

Service Bulletin/Repair Instructions

Dealer notice advising the availability of Diagnostic software version 2025-07 and dealers should begin using it immediately.

COM1 - 30678

Service Bulletin/Repair Instructions

Dealer notice announcing the availability of Technical Bulletin 250.

TB250

Service Bulletin/Repair Instructions

Technical Bulletin 250 provides instructions that applies to the Triumph Diagnostic Tool Update - Smart Scan VIN Query and VIN Data Page, Triumph Diagnostic Tool - Engine ECM Diagnostics - Write VIN Function, Electronic Control Modules (ECMs) Must Not Be Swapped Between Motorcycles.

COM9 - 30576

Service Bulletin/Repair Instructions

Dealer notice advising the availability of Diagnostic software version 2025-06 and dealers should begin using it immediately.

COM7 - 30524

Service Bulletin/Repair Instructions

Dealer notice advising of some customer complaints relating to condensation in the instrument pack and headlamp.

COM6 - 30499

Service Bulletin/Repair Instructions

Dealer notice announcing the availability of Diagnostic software version 2025-05 and dealers should begin using it immediately.

COM6_30309

Service Bulletin/Repair Instructions

Dealer notice advising that the new Autoscan feature within the SmartScan function has now been enabled with the release of TDT 2025-04.1 and that instructions are detailed in Technical Bulletin 249.

TB249

Service Bulletin/Repair Instructions

Technical Bulletin 249 provides instructions that applies to the Triumph Diagnostic Tool - New Smart Scan Download Feature - Calibration Option Selection and the Triumph Diagnostic Tool - New Smart Scan Feature - Autoscan.

COM5_30212

Service Bulletin/Repair Instructions

Dealer notice announcing the availability of Diagnostic software 2025-04.1 and that dealers should begin using it immediately. This version includes a fix for the hardware part number-based calibration download issue.

COM3_30112

Service Bulletin/Repair Instructions

Dealer notice announcing the availability of Diagnostic software 2025-04 and dealers should begin using it immediately.

COM2-29860

Service Bulletin/Repair Instructions

Dealer notice advising of an issue in the latest version of the My Triumph App where the navigation feature will not operate.

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.