AI-generated · grounded in NHTSA data
Reliability & 5-year cost of ownership — 2018 Triumph Bonneville T120
Overall rating NHTSA-grounded
Above average
Estimated 5-year repair + maintenance cost: $1,000–$3,000
The 2018 Triumph BONNEVILLE T120 shows a strong reliability profile with minimal recalls and owner complaints. The single complaint in the electrical system doesn't reflect a prevalent issue, suggesting overall quality largely surpasses average standards.
Most-common failures
| Part | Typical mileage | Cost range | Frequency |
|---|---|---|---|
| electrical system | 10,000–20,000 miles | $100–$300 | rare |
Scheduled maintenance to budget
Routine items every owner should plan for.
- Oil and filter changes
- Brake fluid replacement
- Chain adjustment and lubrication
- Valve clearance check
- Spark plug replacement
Warning signs to watch for
Symptoms that signal a major upcoming repair.
- Dimming headlights
- Starting issues
- Burnt electrical smell
Generated by gpt-4o on 8/20/2026. Cost ranges are conservative estimates that account for typical regional variation.