1.) I would like to begin by saying that my bike is nearly brand new. Only just over 4k miles. So, the following problem is not in any way a result of the bike being an old or beaten down vehicle. The rear brake light and turn signals failed due to the cable that runs under the rear fender to the rear lights (being suspended by very weak and half attached thin metal tabs) becoming dislodged from their incredibly suspect holding tabs and rubbing on the tire. Thus, stripping and destroying the cable. This is available for inspection upon request. The way the cable is attached is the crux of the complaint I am making. It is unfathomable how this could have not only been designed in the first place, but then approved for production. 2.) If the tire had gotten hold of the cable and ripped it from the bike I could have been thrown from the bike and killed. This is an incredibly unsafe and extremely poorly designed portion of the bike. In addition to the feature having the ability to kill any rider it also has resulted in the lights not working. Not having brake lights or turn signals in the rear can result in other drivers not knowing what you are doing and causing an accident. 3.) To my knowledge this problem has not been addressed in any way by the manufacturer or any other person. I am currently waiting for an upcoming appointment with the dealer to address this issue. 4.) There was no warning of the possibility of this issue. One moment it works perfectly fine, next it is sent into catastrophic failure. Luckly in my case I was uninjured, and the cable was only stripped and frayed and did not get grabbed by the tire. Conclusion This problem is insanely dangerous and can result in death. This feature is so irresponsible and poorly designed it bogles the mind. How Triumph can get away with this without a recall is utterly monstrous. There is no reason for this poor design other than to have it fail on purpose or a complete disregard for any concept of safety.
The worst 2018 Triumph Bonneville Bobber problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
- Lights1
- Wheels1
Problems by type
Tap a problem to see which part fails, at what mileage and in which other years.
- Lights1
- Wheels1
Recalls
No recalls on record for this model year.
Technical service bulletins for the 2018 Triumph Bonneville Bobber 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 Bobber owners say
Most recent owner complaints, unedited.
Compare the 2018 Triumph Bonneville Bobber
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Questions about the 2018 Triumph Bonneville Bobber
Is the 2018 Triumph Bonneville Bobber reliable?
Owners have filed 1 complaint about the 2018 Triumph Bonneville Bobber, close to a typical Bonneville Bobber model year.
What is the most common problem with the 2018 Triumph Bonneville Bobber?
Lights, with 1 complaint. Next is wheels (1).
How many recalls does the 2018 Triumph Bonneville Bobber have?
No recalls on record.
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