2005 Triumph Rocket Iii problems & reliability
20 owner complaints filed with NHTSA for the 2005 Triumph Rocket Iii, alongside 2 safety recall campaigns. Last verified Aug 7, 2026. Complaints are unverified reports submitted by owners to the federal Office of Defects Investigation.
Each complaint is counted once (by NHTSA case number), even when it names several vehicles.
2 complaints report injuries (2 injured).
Most reported problems
| Component | Complaints | Share |
|---|---|---|
| Electrical System | 6 | 30% |
| Engine and Engine Cooling | 5 | 25% |
| Power Train | 5 | 25% |
| Engine | 1 | 5% |
| Fuel System, Gasoline | 1 | 5% |
| Service Brakes, Hydraulic | 1 | 5% |
| Structure | 1 | 5% |
| Tires | 1 | 5% |
Component groups as classified by NHTSA. A complaint can name more than one component, so shares may sum to more than 100%.
Common symptoms owners describe
Keyword analysis of complaint narratives; one complaint can describe several symptoms.
Complaints by incident year
What owners report
“The rocket iii has a known history of ignition failure and total electrical failure. The bike will simply turn off, often in the process of steering. The triumph rat forums are full of stories highlighting this problem, and my bike alone has had the ignition switch replaced multiple times, but triumph refuses to…”
Electrical System · filed May 4, 2016
“Under acceleration, engine has a rattle like a spray paint can. I've done some research, and this is a common problem leading to engine failure, due to a timing chain/sprocket issue. I would like triumph to issue a recall to fix this, before it fails. *tr”
Engine · filed Jun 30, 2014
“At app. 8,500 miles going down the interstate motor just shut off. In the past year several times the instrument panel was not working. Switched bike off then back on started working. Took it to the local triumph dealer today. Owner said it was the ignition switch was failing. Told me $400.00 plus for part. Didn't…”
Electrical System · filed Oct 12, 2013
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Federal defect investigations
- MOTORCYCLE STALLING
Preliminary Evaluation PE07030 · opened Jun 20, 2007 · closed Oct 19, 2007 · led to recall 07V455000
Technical service bulletins
95 manufacturer communications (TSBs, service campaigns, warranty extensions) are on file with NHTSA for the 2005 Triumph Rocket Iii. The 10 most recent:
Dealer notice announcing the availability of Triumph Diagnostic Tool 2026-07 and dealers should begin using it immediately.
COM1-35109 · Service Bulletin/Repair Instructions · issued Jul 14, 2026
Dealer notice announcing the availability of Triumph Diagnostic Tool 2026-06.1 and dealers should begin using it immediately.
COM2 - 34886 · Service Bulletin/Repair Instructions · issued Jun 23, 2026
Dealer notice announcing the availability of Triumph Diagnostic Tool version 2026-06 and dealers should begin using it immediately.
COM6 - 34491 · Service Bulletin/Repair Instructions · issued May 19, 2026
Dealer notice announcing the availability of Technical Bulletin 264.
COM5 - 34490 · Service Bulletin/Repair Instructions · issued May 19, 2026
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.
TB264 · Service Bulletin/Repair Instructions · issued May 18, 2026
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.
COM4 - 34435 · Service Bulletin/Repair Instructions · issued May 14, 2026
Dealer notice announcing the availability of Diagnostic software 2026-05.1 and dealers should begin using it immediately.
COM02 - 34238 · Service Bulletin/Repair Instructions · issued Apr 24, 2026
Dealer notice reminding of Motorcycle Cleaning, prohibited use of High-Pressure & Steam Cleaning equipment.
COM01 - 34227 · Service Bulletin/Repair Instructions · issued Apr 23, 2026
Dealer notice announcing the availability of Diagnostic software 2026-04 and dealers should begin using it immediately.
COM01 - 33784 · Service Bulletin/Repair Instructions · issued Mar 17, 2026
Dealer notice announcing the availability of Diagnostic software 2026-03 and dealers should begin using it immediately.
COM1 - 33480 · Service Bulletin/Repair Instructions · issued Feb 18, 2026
TSBs are repair guidance manufacturers send to dealers — they are not recalls and repairs are not automatically free. Full documents are available on NHTSA’s site.
Safety recalls
The 2005 Triumph Rocket Iii has 2 NHTSA recall campaigns — recall repairs are free at franchised dealers regardless of the vehicle’s age.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →Buying a used 2005 Triumph Rocket Iii?
- · Decode the seller’s VIN with our free VIN decoder to confirm the exact year, engine and trim.
- · Check for unrepaired recalls by VIN on NHTSA’s official lookup — recall repairs are free.