2023 Triumph Bonneville T120 problems, complaints & recalls
Most-reported problem areas: Electrical System (1)
Safety recalls (3)
Electrical System:wiring:connectors/Plugs/Receptacles 2026-02-11 · campaign 26V078000 · 8,849 vehicles
Defect: Triumph Motorcycles America, Ltd. is recalling certain 2022-2024 Bonneville T100, Bonneville T120, Bonneville T120 Black, 2024 Bonneville T120 DGR, 2022 Street Twin, Street Scrambler, Street Twin Goldline, Street Scrambler Sandstor, 2023-2024 Speed Twin 900, and Scrambler 900 motorcycles. The wiring between the alternator and main harness connector may short circuit and overheat.
Risk: Overheated wiring increases the risk of a crash or fire.
Fix: Dealers will replace the current 2-piece connector body with a single in-line crimped connector solution for each of the three wires from the alternator assembly, free of charge. Owner notification letters were mailed March 19, 2026. Owners may contact Triumph customer service at 1-678-854-2010. Triumph's number for this recall is SRAN 641. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov February 18, 2026. Motorcycles included in this recall that were
Electrical System:wiring:connectors/Plugs/Receptacles 2024-10-21 · campaign 24V785000 · 8,801 vehicles
Defect: Triumph Motorcycles America, Ltd. (Triumph) is recalling certain 2022-2024 Bonneville T100, T120, T120 Black, 2022 Triumph Street Scrambler, Street Scrambler Sandstorm, Street Twin, Street Twin Goldline, 2023-2024 Scrambler 900, and Speed Twin 900 motorcycles. The wiring between the alternator and main harness connector may short circuit and overheat.
Risk: Overheated wiring increases the risk of a fire or crash.
Fix: Dealers will install a new wire alignment clip, free of charge. Owner notification letters were mailed November 18, 2024. Owners may contact Triumph customer service at 1-678-854-2010. Triumph's number for this recall is SRAN 627.
Service Brakes, Hydraulic:foundation Components:disc 2023-03-06 · campaign 23V146000 · 988 vehicles
Defect: Triumph Motorcycles America, Ltd. (Triumph) is recalling certain 2023 Bonneville T120 and Bonneville T120 Black motorcycles. The left-hand side (LHS) brake disc may be improperly secured and can detach.
Risk: The detachment of the LHS brake disc can reduce brake performance, increasing the risk of a crash.
Fix: Dealers will install a replacement damper and also replace the disc bolts, free of charge. Owner notification letters were mailed March 24, 2023. Owners may contact Triumph's customer service at 1-678-854-2010. Triumph's number for this recall is SRAN 606.
Service bulletins (76)
Technical service bulletins are repair instructions manufacturers send dealers for known issues. Unlike recalls, the fix is not automatically free — but naming the bulletin at the service desk can save diagnosis time and support goodwill repairs.
Electrical System 2026-09-22 · COM2_35786 · Service Bulletin/Repair Instructions
dealer notice announcing the availability of daignostic software and dealers should begin using it immediately.
Electrical System 2026-07-14 · COM1-35109 · Service Bulletin/Repair Instructions
dealer notice announcing the availability of triumph diagnostic tool 2026-07 and dealers should begin using it immediately.
Electrical System 2026-06-23 · 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.
Electrical System 2026-05-19 · 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.
Unknown Or Other 2026-05-19 · COM5 - 34490 · Service Bulletin/Repair Instructions
dealer notice announcing the availability of technical bulletin 264.
Unknown Or Other 2026-05-18 · 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.
Showing the 6 most recent of 76 bulletins. Search all of them free at nhtsa.gov.
What owners report
2025-02-28 · Electrical System · 100 mi“the contact owns a 2023 triumph bonneville t120. the contact received notification of nhtsa campaign number: 24v785000 (electrical system); however, there are no local dealers on the island to repair the recall. the contact stated that there was an abnormal sound coming from the engine while starting the motorcycle. the manufacturer was made aware …”
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.