1975 Triumph Bonneville — MOT History by Age

How cars manufactured in 1975 perform at MOT as they age

51 years

Current Age

95.0%

Latest Pass Rate

662

Total Tests (All Years)

22,078 mi

Avg Mileage (Latest)

Data from official DVSA MOT testing records

Insufficient data for same-age comparison.

How This Car Ages

Pass rate progression for the 1975 Triumph Bonneville as it ages.

34 yrs83.3%

→ ↓1.5%

35 yrs81.8%

→ ↓0.1%

36 yrs81.7%

→ ↑6.5%

37 yrs88.2%

→ ↑0.8%

38 yrs89.0%

→ ↓1.8%

39 yrs87.2%

→ ↓2.3%

40 yrs84.9%

→ ↑9.0%

41 yrs93.9%

→ ↑1.1%

42 yrs95.0%

📊 View as table

Age	Pass Rate	Tests
34 yrs	83.3%	60
35 yrs	81.8%	66
36 yrs	81.7%	82
37 yrs	88.2%	68
38 yrs	89.0%	73
39 yrs	87.2%	78
40 yrs	84.9%	73
41 yrs	93.9%	82
42 yrs	95.0%	80

Pass Rate Trend

How the 1975 Triumph Bonneville pass rate changes as it ages, from first MOT to most recent.

📊 View as table

Built	Pass Rate	Tests
2017 (42 yrs)	95%	80
2016 (41 yrs)	93.9%	82
2015 (40 yrs)	84.9%	73
2014 (39 yrs)	87.2%	78
2013 (38 yrs)	89%	73
2012 (37 yrs)	88.2%	68
2011 (36 yrs)	81.7%	82
2010 (35 yrs)	81.8%	66
2009 (34 yrs)	83.3%	60

Year-by-Year MOT Results

2009

83.3%

Age (yrs) 34Tests 60Avg Mileage 24,241Top Failure Motorcycle lighting and signalling — 11.7%

2010

81.8%

Age (yrs) 35Tests 66Avg Mileage 25,069Top Failure Motorcycle lighting and signalling — 12.1%

2011

81.7%

Age (yrs) 36Tests 82Avg Mileage 23,513Top Failure Motorcycle lighting and signalling — 12.2%

2012

88.2%

Age (yrs) 37Tests 68Avg Mileage 25,109Top Failure Motorcycle lighting and signalling — 5.9%

2013

89.0%

Age (yrs) 38Tests 73Avg Mileage 23,676Top Failure Motorcycle reg plates and vin — 6.8%

2014

87.2%

Age (yrs) 39Tests 78Avg Mileage 23,610Top Failure Motorcycle lighting and signalling — 11.5%

2015

84.9%

Age (yrs) 40Tests 73Avg Mileage 23,138Top Failure Motorcycle steering and suspension — 15.1%

2016

93.9%

Age (yrs) 41Tests 82Avg Mileage 21,154Top Failure Motorcycle lighting and signalling — 4.9%

2017

95.0%

Age (yrs) 42Tests 80Avg Mileage 22,078Top Failure Motorcycle lighting and signalling — 2.5%

MOT results for 1975 Triumph Bonneville by test year
Test Year▲	Age (yrs)▲▼	Pass Rate▲▼	Tests▲▼	Avg Mileage▲▼	Top Failure▲▼
2009	34	83.3%	60	24,241	Motorcycle lighting and signalling — 11.7%
2010	35	81.8%	66	25,069	Motorcycle lighting and signalling — 12.1%
2011	36	81.7%	82	23,513	Motorcycle lighting and signalling — 12.2%
2012	37	88.2%	68	25,109	Motorcycle lighting and signalling — 5.9%
2013	38	89.0%	73	23,676	Motorcycle reg plates and vin — 6.8%
2014	39	87.2%	78	23,610	Motorcycle lighting and signalling — 11.5%
2015	40	84.9%	73	23,138	Motorcycle steering and suspension — 15.1%
2016	41	93.9%	82	21,154	Motorcycle lighting and signalling — 4.9%
2017	42	95.0%	80	22,078	Motorcycle lighting and signalling — 2.5%

Common MOT Failures

Top failure categories across all test years for 1975 Triumph Bonneville, with age trends.

Motorcycle lighting and signalling

8.7%

↓ Decreases with age

Motorcycle steering and suspension

6.9%

↓ Decreases with age

Motorcycle brakes

3.7%

— Consistent

Motorcycle fuel and exhaust

3.3%

— Consistent

Motorcycle reg plates and vin

3.0%

— Consistent

How Failures Change With Age

Comparing failure rates between the youngest and oldest test years.

Category	At Youngest	At Oldest	Change	Trend
Motorcycle lighting and signalling	11.7% (34 yrs)	2.5% (42 yrs)	-9.2%	🟢 ↓
Motorcycle steering and suspension	10.0% (34 yrs)	1.3% (42 yrs)	-8.7%	🟢 ↓
Motorcycle brakes	3.3% (34 yrs)	1.3% (42 yrs)	-2.0%	⚪ —

Other Manufacture Years

Looking for the best year to buy? See the full comparison on the Triumph Bonneville page →

About This Data

This page shows how Triumph Bonneville cars manufactured in 1975 perform at MOT as they age. Data spans from 2009 to 2017, covering 662 tests. Pass rates naturally decline with age as components wear.

Based on DVSA anonymised MOT test data (2005–2024). Crown copyright, Open Government Licence v3.0.