2026 KTM 390 Adventure R Problems
Owner-reported complaints filed with NHTSA, grouped by component
Data refreshed
What this page shows
Everything below is an owner-reported complaint submitted to NHTSA about the 2026 KTM 390 Adventure R, grouped by the component NHTSA recorded on the report. These are not confirmed defects, and they are not recalls. NHTSA does not verify most reports before publishing them, and a category with more reports in it is not evidence that a part is defective.
Complaints are reports submitted by owners and drivers to NHTSA. They are not verified and do not establish that a defect exists.
Reports by component
Ranked by how many owner reports name each component category
- Electrical266.7%
- Exterior lighting133.3%
Percentages are of component mentions. A single complaint can name more than one component, so these do not sum to the total complaint count.
Each component in detail
What the reports in each category say, in the owners' own words
Electrical
Reports naming the electrical system — wiring, battery, charging, control modules, infotainment and electrical accessories.
From owner reports, verbatim
The turn signals on my 2026 KTM 390 Adventure do not function properly. They either fail completely or work intermittently. This creates a serious safety hazard because other drivers cannot see when I am turning or changing lanes. This increases the risk of a crash, especially in traffic or low light conditions. •“Problem happens every ride” •“Problem started at miles 10 •“Dealer could not fix” even replaced blinkers. I only have 32 miles on my bike.
1. The Turn Signal Malfunction indicator is randomly triggered. Observation indicates this occurs when the ambient temperature is under 60 degrees. When the error code is displayed, the turn signals are non-functional. 2. The first time this occurred I was several miles from home at dusk. I had to turn onto and off of a highway without turn signals. At that time of day hand signals are not easily seen. This is dangerous. 3. This is the second bike my dealer has recently sold with this issue. The dealer left my bike in an unheated area over night and were able to duplicate the fault the next morning. 4. An incident has been filed with the Manufacturer but they do not have a repair currently. They were aware of the issue. 5. A warning light appears on the TFT dash when the fault is detected.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Exterior lighting
Reports naming headlights, tail lights, turn signals and other exterior lighting.
From owner reports, verbatim
1. The Turn Signal Malfunction indicator is randomly triggered. Observation indicates this occurs when the ambient temperature is under 60 degrees. When the error code is displayed, the turn signals are non-functional. 2. The first time this occurred I was several miles from home at dusk. I had to turn onto and off of a highway without turn signals. At that time of day hand signals are not easily seen. This is dangerous. 3. This is the second bike my dealer has recently sold with this issue. The dealer left my bike in an unheated area over night and were able to duplicate the fault the next morning. 4. An incident has been filed with the Manufacturer but they do not have a repair currently. They were aware of the issue. 5. A warning light appears on the TFT dash when the fault is detected.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Higher-selling and older vehicles accumulate more reports. Counts are not failure rates and are not directly comparable between vehicles that sold in very different numbers.
Elsewhere on this vehicle
Data sources
- NHTSA Office of Defects Investigation — owner-reported complaints and the components recorded on them
Data on this page last refreshed .