Tl* the contact owns a 2018 triumph bonneville t120 motorcycle. The contact stated that while driving the turn signals failed to operate as designed. The motorcycle was taken to triumph of brooklyn located at 105 metropolitan ave, brooklyn ny 11249, to be diagnosed. The contact was informed that electronic display was defective and needed to be replaced. The electronic display was replaced however, the failure recurred. The motorcycle was taken back to the same dealer and the wiring harness was replaced however, the failure recurred. The contact referenced the federal safety agency campaign number: 19v133000 (electrical system) as a possible solution to the failure however, the VIN was not included. The manufacturer was not notified of the failure. The failure mileage was 500.
The worst 2018 Triumph Bonneville T120 problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
- Electrical1
Problems by type
Tap a problem to see which part fails, at what mileage and in which other years.
- Electrical1
Recalls
No recalls on record for this model year.
Technical service bulletins for the 2018 Triumph Bonneville T120 93
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- Dealer notice announcing the availability of Daignostic software and dealers should begin using it...
- Dealer notice advising to check for an immobiliser software update before replacing any TPMS components on...
- Dealer notice announcing the availability of Triumph Diagnostic Tool 2026-07 and dealers should begin...
- Dealer notice announcing the availability of Triumph Diagnostic Tool 2026-06.1 and dealers should begin...
- Dealer notice announcing the availability of Technical Bulletin 264.
- Dealer notice announcing the availability of Triumph Diagnostic Tool version 2026-06 and dealers should...
- Technical Bulletin 264 provides instructions that relates to: Triumph Diagnostic Tool
- Dealer notice advising the availalbility of TDT version 2026-05.2 which resolves the ABS as Not Connected...
- Dealer notice announcing the availability of Diagnostic software 2026-05.1 and dealers should begin using...
- Dealer notice reminding of Motorcycle Cleaning, prohibited use of High-Pressure & Steam Cleaning equipment.
What 2018 Triumph Bonneville T120 owners say
Most recent owner complaints, unedited.
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Questions about the 2018 Triumph Bonneville T120
Is the 2018 Triumph Bonneville T120 reliable?
Owners have filed 1 complaint about the 2018 Triumph Bonneville T120, close to a typical Bonneville T120 model year.
What is the most common problem with the 2018 Triumph Bonneville T120?
Electrical system, with 1 complaint.
How many recalls does the 2018 Triumph Bonneville T120 have?
No recalls on record.
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