1973 Norton Unclassified — MOT History by Age

How cars manufactured in 1973 perform at MOT as they age

53 years

Current Age

94.7%

Latest Pass Rate

348

Total Tests (All Years)

19,639 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 1973 Norton Unclassified as it ages.

36 yrs91.4%

→ ↓8.5%

37 yrs82.9%

→ ↑0.9%

38 yrs83.8%

→ ↑13.4%

39 yrs97.2%

→ ↓6.6%

40 yrs90.6%

→ ↑3.2%

41 yrs93.8%

→ ↓2.4%

42 yrs91.4%

→ ↓1.6%

43 yrs89.8%

→ ↑4.9%

44 yrs94.7%

📊 View as table

Age	Pass Rate	Tests
36 yrs	91.4%	35
37 yrs	82.9%	35
38 yrs	83.8%	37
39 yrs	97.2%	36
40 yrs	90.6%	32
41 yrs	93.8%	32
42 yrs	91.4%	35
43 yrs	89.8%	49
44 yrs	94.7%	57

Pass Rate Trend

How the 1973 Norton Unclassified pass rate changes as it ages, from first MOT to most recent.

📊 View as table

Built	Pass Rate	Tests
2017 (44 yrs)	94.7%	57
2016 (43 yrs)	89.8%	49
2015 (42 yrs)	91.4%	35
2014 (41 yrs)	93.8%	32
2013 (40 yrs)	90.6%	32
2012 (39 yrs)	97.2%	36
2011 (38 yrs)	83.8%	37
2010 (37 yrs)	82.9%	35
2009 (36 yrs)	91.4%	35

Year-by-Year MOT Results

2009

91.4%

Age (yrs) 36Tests 35Avg Mileage 23,394Top Failure Motorcycle lighting and signalling — 8.6%

2010

82.9%

Age (yrs) 37Tests 35Avg Mileage 18,923Top Failure Motorcycle lighting and signalling — 11.4%

2011

83.8%

Age (yrs) 38Tests 37Avg Mileage 21,812Top Failure Motorcycle lighting and signalling — 10.8%

2012

97.2%

Age (yrs) 39Tests 36Avg Mileage 20,092Top Failure Motorcycle lighting and signalling — 2.8%

2013

90.6%

Age (yrs) 40Tests 32Avg Mileage 27,334Top Failure Motorcycle lighting and signalling — 9.4%

2014

93.8%

Age (yrs) 41Tests 32Avg Mileage 19,760Top Failure Motorcycle lighting and signalling — 6.3%

2015

91.4%

Age (yrs) 42Tests 35Avg Mileage 21,882Top Failure Motorcycle reg plates and vin — 8.6%

2016

89.8%

Age (yrs) 43Tests 49Avg Mileage 19,269Top Failure Motorcycle lighting and signalling — 10.2%

2017

94.7%

Age (yrs) 44Tests 57Avg Mileage 19,639Top Failure Motorcycle lighting and signalling — 3.5%

MOT results for 1973 Norton Unclassified by test year
Test Year▲	Age (yrs)▲▼	Pass Rate▲▼	Tests▲▼	Avg Mileage▲▼	Top Failure▲▼
2009	36	91.4%	35	23,394	Motorcycle lighting and signalling — 8.6%
2010	37	82.9%	35	18,923	Motorcycle lighting and signalling — 11.4%
2011	38	83.8%	37	21,812	Motorcycle lighting and signalling — 10.8%
2012	39	97.2%	36	20,092	Motorcycle lighting and signalling — 2.8%
2013	40	90.6%	32	27,334	Motorcycle lighting and signalling — 9.4%
2014	41	93.8%	32	19,760	Motorcycle lighting and signalling — 6.3%
2015	42	91.4%	35	21,882	Motorcycle reg plates and vin — 8.6%
2016	43	89.8%	49	19,269	Motorcycle lighting and signalling — 10.2%
2017	44	94.7%	57	19,639	Motorcycle lighting and signalling — 3.5%

Common MOT Failures

Top failure categories across all test years for 1973 Norton Unclassified, with age trends.

Motorcycle brakes

8.6%

— Consistent

Motorcycle lighting and signalling

7.6%

↓ Decreases with age

Motorcycle reg plates and vin

5.8%

↑ Increases with age

Motorcycle tyres and wheels

4.2%

— Consistent

Motorcycle fuel and exhaust

2.9%

— 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	8.6% (36 yrs)	3.5% (44 yrs)	-5.1%	🟢 ↓
Motorcycle steering and suspension	2.9% (36 yrs)	1.8% (44 yrs)	-1.1%	⚪ —

Other Manufacture Years

1960 1961 1962 1964 1971 1972 1973 1974 1975 1976

← Back to Norton Unclassified overview

Looking for the best year to buy? See the full comparison on the Norton Unclassified page →

About This Data

This page shows how Norton Unclassified cars manufactured in 1973 perform at MOT as they age. Data spans from 2009 to 2017, covering 348 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.