Should I check the MOT history before buying a 2021 Triumph Bonneville?

Yes. Look for recurring advisories — slow-building issues like corrosion or brake wear patterns show up years before they become failures. A full MOT history analysis will highlight patterns that a single test result won't reveal.

What corrosion should I look for when inspecting a 2021 Triumph Bonneville?

Check brake pipes, sills, subframes, and chassis legs. Surface rust is normal at this age; structural rust is a serious problem that is expensive to fix and can fail an MOT.

How are tyres and brakes typically on a 2021 Triumph Bonneville?

Tyres and brakes are the most common advisory items on vehicles of this age. Budget for replacement if they are near the limit, and factor this into your offer price.

Is the 2021 Triumph Bonneville reliable?

Based on MOT data from 362 vehicles, the 2021 Triumph Bonneville has a first-time MOT pass rate of 95%, indicating generally reliable for its class. Always check the full MOT history of any specific vehicle before buying.

What are common problems with the 2021 Triumph Bonneville?

The most frequently recorded MOT issues on the 2021 Triumph Bonneville are: Front Tyre worn close to the legal limit (23.1% of vehicles), Exhaust noisy (20.3% of vehicles), Front Brake pad(s) close to minimum limit (14.3% of vehicles). These figures are based on actual MOT test records — search a specific registration on CarHunch to see its individual history.

Do I need an HPI check when buying a 2021 Triumph Bonneville?

Yes. The MOT history will not show outstanding finance, insurance write-offs, or stolen status. An HPI check covers these areas and should be part of any used car purchase.

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Triumph Bonneville (2021)

362 real MOT outcomes analysed • 95% first-time pass rate

2021 Triumph Bonneville

CarHunch analysed 362 real MOT records for the 2021 Triumph Bonneville. Real test outcomes — pass rates, defect profiles, mileage data — from verified DVLA records. Updated as new MOTs are recorded.
Which year to buy? →

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AI Analysis Reliability Overview Common Issues Check a Specific Reg Buyer's Checklist Mileage Distribution MOT Averages Colour Breakdown Compare Models

Moderate sample. 362 vehicles on record. Figures are indicative — the specific vehicle's history matters more than these averages.

The 2021 Triumph Bonneville is impressively reliable, with a first-time pass rate of 94.8% — well above the UK average of 80% — and only 2.5% of vehicles ever flagged for dangerous defects, which poses minimal buyer concern. Petrol and diesel comparisons aren't relevant here since this is a motorcycle.

At just 3,597 miles median mileage for vehicles now three years old, these Bonnevilles are lightly used, which partly explains the stellar pass rate. The average of only 0.16 failures and 0.6 advisories per vehicle confirms this is genuinely robust engineering; if you're considering one, focus your pre-purchase inspection on brake fluid condition and battery health, as these are common wear items on mature motorcycles regardless of make.

The 2021 Triumph Bonneville passes its MOT first time more often than most UK vehicles (95% vs ~80% average) — and when it does fail, it's usually something minor and cheap to fix.

First-time pass

95%

UK average ~80%

Better than average

Dangerous (ever)

2.5%

At least once in MOT history

Check this vehicle

Avg failures / car

0.16

Over 2.1 tests on record

Low

Typical mileage

Middle half: 2k–7k

For context

✅ Good baseline reliability. A 95% first-time pass rate puts this well above the UK average — it's a well-sorted vehicle in this age bracket.

These stats describe 362 vehicles as a group. The specific vehicle you're looking at could be the one good example or the one outlier. Run its registration to find out.

A solid choice — agree?

What tends to go wrong

Across 362 vehicles — figures show how many had each issue flagged at least once in their MOT history.

Tyre wear 23.1%

Front Tyre worn close to the legal limit · Rear Tyre worn close to the legal limit

Budget for a full set — on a vehicle this age, tyres are expected consumables. An inspection will confirm how much is left.

Exhaust & emissions 20.3%

Exhaust noisy

Brake wear 14.3%

Front Brake pad(s) close to minimum limit · Rear Brake pad(s) close to minimum limit · Front Brake indicates slight fluctuation of brake effort · …

Ask the seller when brakes were last serviced. If they don't know, factor in the cost.

Lighting 8.8%

Headlamp aim too high · Rear reflector missing · Drive chain slightly loose · …

Usually cheap to fix. Worth confirming all lights work before collecting.

Suspension & steering 5.3%

Steering headbearing slightly stiff or notchy

Harder to spot without a ramp — this is a good reason to book a pre-purchase inspection.

Other issues 3.8%

Registration plate does not conform to the specified requirements

Data covers a 3-year window centred on 2021.

See this vehicle's full MOT history & AI hunches

Spot recurring advisories, hidden issues, and how it compares to 362 Triumph Bonneville cars.

Before you buy a 2021 Triumph Bonneville

Based on MOT data from 362 vehicles — here's what to check.

📋 Check the full MOT history. 2.5% of these vehicles have had a dangerous defect recorded - recurring advisories often signal problems years before they become failures.
Search the reg on CarHunch for the full MOT history, reliability stats and a free AI-powered analysis of that exact vehicle.
🔍 Brake pipes, sills and subframes are the key areas on a vehicle this age — structural rust is hard to spot without getting underneath. A mechanic will check all of this before you commit, and give you a concrete basis to negotiate on price. Inspection →
📄 Outstanding finance, insurance write-offs and clocking won't appear in the MOT records — a dedicated history check covers all of this. Our link gets you 20% off automatically. History Get 20% off via CarHunch

Colour Breakdown

Based on 30,017 Triumph Bonneville vehicles registered in the UK — across all years. From DVLA registration records.

Black 38.4%

11,529

Red 19%

5,708

Blue 12.4%

3,728

White 9.2%

2,764

Green 6.3%

1,882

Silver 4.7%

1,410

Grey 3.1%

919

Gold 2.7%

802

Orange 1.9%

557

Maroon 1%

294

Purple 0.7%

225

Multi-colour 0.7%

199

Mileage Distribution

Most 2021 Triumph Bonneville vehicles sit in the blue band. If the vehicle you're looking at is outside it, it's either unusually low or high mileage for its age.

3,597

typical

2,153

low mileage

6,518

high mileage

Half of all 2021 Triumph Bonneville vehicles fall between 2,153 and 6,518 miles.

Is the mileage you're seeing normal?

✓ Under 2,153 miles — lower than most. Could be great, or could be a vehicle that rarely moved. Check test frequency and mileage progression in the MOT history.

✓ 2,153–6,518 miles — normal for age. This is where most 2021 Triumph Bonnevilles sit.

⚠ Over 8,799 miles — higher than typical. Not necessarily a problem, but check service history and look out for advisory build-up on tyres and brakes.

MOT History Averages

2.1

Avg MOT tests per vehicle

0.16

Avg failures per vehicle

0.6

Avg advisories per vehicle

Other model years — Triumph Bonneville: All Bonneville years → Which year to buy? →

1980 1981 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020

Or browse all models: Triumph →

Compare with another model

See how the 2021 Triumph Bonneville stacks up against a rival.

A solid choice — agree?