2024 Triumph Speed 400 Electrical system Problems
- Complaints
- 4about this part
- Share
- 44%of 9 total for the year
- Median mileage
- —not reported
- Trend
- Too newThis model year is less than 4 years old, so a trend is not meaningful yet.
NHTSA recorded 4 complaints about the electrical system of the 2024 Triumph Speed 400, 44% of the 9 complaints for this model year.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“Coming to a stop the engine just quit, as if I turned the ignition switch off. The dash was also blank. I turned the switch to the off position and then back to the on position, and it started as normal. I have read about this same sort of thing happening to numerous other riders of this bike. Triumph needs to have a recall to fix the glitch in the ecu.”
NHTSA complaint #11622006, filed 2024-10“The motorcycle cuts out when slowing down—engine just dies, but all the electrical stays on. This is a brand-new bike with only 500 miles on it. It happened while I was riding, and I suddenly had no power. Luckily, I was on the right side of the road and managed to coast to the shoulder safely, but it could’ve gone a lot worse. There were no prior warning lights. I scheduled an inspection, but the earliest appointment isn’t until later this month. In the meantime, I did some digging—this doesn’t seem like an isolated issue. A quick search shows a lot of riders are having the same problem. …”
NHTSA complaint #11653225, filed 2025-04“Odometer is approximately 5% off (reads too far). This impact service intervals and estimations for range. Speedometer is fully 10% off (overestimates speed). This affects safety, because it impacts your perceived speed. This is unacceptable on a new bike.”
NHTSA complaint #11684669, filed 2025-09“Bike shut off electrically while traveling at highway speeds. Signal flashers and emergencies failed and there was no throttle response. Check engine light came on and traction control disabled light came on. Bike displayed an error code of P2138 and P2122. Bike was unable to be safely ridden after being shut down and restarted. The bike could be ridden after starting for a short time before the throttle cut out again and complete loss of power. Emergency flasher functionality was intermittent with each attempt at starting the engine again.”
NHTSA complaint #11670011, filed 2025-06Related service bulletins
- 11037983Sep 22, 2026Dealer notice announcing the availability of Daignostic software and dealers should begin using it immediately.
- 11035862Jul 14, 2026Dealer notice announcing the availability of Triumph Diagnostic Tool 2026-07 and dealers should begin using it immediately.
- 11034475Jun 23, 2026Dealer notice announcing the availability of Triumph Diagnostic Tool 2026-06.1 and dealers should begin using it immediately.
- 11033612May 19, 2026Dealer notice announcing the availability of Triumph Diagnostic Tool version 2026-06 and dealers should begin using it immediately.
- 11033609May 14, 2026Dealer 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.
- 11032303Apr 24, 2026Dealer notice announcing the availability of Diagnostic software 2026-05.1 and dealers should begin using it immediately.
- 11030550Mar 17, 2026Dealer notice announcing the availability of Diagnostic software 2026-04 and dealers should begin using it immediately.
- 11029561Feb 18, 2026Dealer notice announcing the availability of Diagnostic software 2026-03 and dealers should begin using it immediately.
- 11028327Jan 28, 2026Dealer notice announcing the availability of Diagnostic software 2026-02 and dealers should begin using it immediately.
- 11028326Jan 7, 2026Dealer notice announcing the availability of Diagnostic software 2026-01 and dealers should begin using it immediately.
Electrical system: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2024 | 4 | 44% |
Other parts of the 2024 Triumph Speed 400
← All problems reported for the 2024 Triumph Speed 400
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 29, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology