Triumph Bonneville T100 (2003)

127 real MOT outcomes analysed • 84.1% first-time pass rate

2003 Triumph Bonneville T100

CarHunch analysed 127 real MOT records for the 2003 Triumph Bonneville T100. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.

Average reliability 4.1% above UK average
84.1%
pass MOT first time
UK average: ~80%
8,707
typical mileage
5,296–13,931 middle half
12.6%
ever had a dangerous defect
recorded at any MOT
1.57
avg MOT failures per car
over 13.7 tests on record

What to check before buying a 2003 Triumph Bonneville T100

Practical pre-purchase checks for this age and model.

  • 📋 Check the full MOT history. Look for recurring advisories — slow-building issues like corrosion or brake wear patterns show up years before they become failures. Enter the reg below for a full AI analysis.
  • 🔍 Inspect for corrosion in person. Brake pipes, sills, subframes, and chassis legs. Surface rust is normal at this age; structural rust is a serious problem that's expensive to fix and can fail an MOT.
  • 🛞 Check tyres and brakes. The most common advisory items at this age. Budget for replacement if they're near the limit — factor this into your offer price.
  • 📄 Run an HPI check. The MOT history won't show outstanding finance, insurance write-offs, or stolen status — an HPI check will.

Before you buy a Triumph Bonneville T100

MOT history is one piece of the puzzle. These checks can reveal what CarHunch can't.

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Pass Rate by Fuel Type

Fuel type Vehicles Pass rate Avg failures
Petrol (99%) 126 84% 1.57
Other (1%) 1 88.9% 1

Mileage Distribution

Most 2003 Triumph Bonneville T100 vehicles sit in the blue band. If the car you're looking at is outside it, it's either unusually low or high mileage for its age.

5,296
low mileage
8,707
typical
13,931
high mileage

Half of all 2003 Triumph Bonneville T100 vehicles fall between 5,296 and 13,931 miles.

2003 Triumph Bonneville T100 — Still on the Road

59 vehicles still getting MOTs in 2025 — 79% of the peak remain.

75 59 2014 2025

Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2014–2025.

MOT History Averages

13.7
Avg MOT tests per vehicle
1.57
Avg failures per vehicle
3.5
Avg advisories per vehicle

Found a specific Triumph Bonneville T100?

Enter the reg to see its individual MOT history, AI Hunches, and how it compares to this cohort.

UK

Other model years — Triumph Bonneville T100:

2004 2021 2022 2023 2024 2025