1991 Porsche 911 — MOT History by Age

How cars manufactured in 1991 perform at MOT as they age

35 years

Current Age

89.9%

Latest Pass Rate

5,917

Total Tests (All Years)

83,193 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 1991 Porsche 911 as it ages.

18 yrs69.9%

→ ↑3.2%

19 yrs73.1%

→ ↓1.5%

20 yrs71.6%

→ ↑3.0%

21 yrs74.6%

→ ↓0.2%

22 yrs74.4%

→ ↑2.2%

23 yrs76.6%

→ ↑0.4%

24 yrs77.0%

→ ↓0.9%

25 yrs76.1%

→ ↑2.7%

26 yrs78.8%

→ ↑2.0%

27 yrs80.8%

→ ↑0.7%

28 yrs81.5%

→ ↓1.6%

29 yrs79.9%

→ ↑4.3%

30 yrs84.2%

→ ↓2.5%

31 yrs81.7%

→ ↑2.4%

32 yrs84.1%

→ ↑5.8%

33 yrs89.9%

📊 View as table

Age	Pass Rate	Tests
18 yrs	69.9%	455
19 yrs	73.1%	453
20 yrs	71.6%	437
21 yrs	74.6%	406
22 yrs	74.4%	390
23 yrs	76.6%	393
24 yrs	77.0%	369
25 yrs	76.1%	380
26 yrs	78.8%	358
27 yrs	80.8%	260
28 yrs	81.5%	254
29 yrs	79.9%	229
30 yrs	84.2%	234
31 yrs	81.7%	257
32 yrs	84.1%	289
33 yrs	89.9%	753

Pass Rate Trend

How the 1991 Porsche 911 pass rate changes as it ages, from first MOT to most recent.

📊 View as table

Built	Pass Rate	Tests
2024 (33 yrs)	89.9%	753
2023 (32 yrs)	84.1%	289
2022 (31 yrs)	81.7%	257
2021 (30 yrs)	84.2%	234
2020 (29 yrs)	79.9%	229
2019 (28 yrs)	81.5%	254
2018 (27 yrs)	80.8%	260
2017 (26 yrs)	78.8%	358
2016 (25 yrs)	76.1%	380
2015 (24 yrs)	77%	369
2014 (23 yrs)	76.6%	393
2013 (22 yrs)	74.4%	390
2012 (21 yrs)	74.6%	406
2011 (20 yrs)	71.6%	437
2010 (19 yrs)	73.1%	453
2009 (18 yrs)	69.9%	455

Year-by-Year MOT Results

2009

69.9%

Age (yrs) 18Tests 455Avg Mileage 95,868Top Failure Lamps, Reflectors and Electrical Equipment — 20.4%

2010

73.1%

Age (yrs) 19Tests 453Avg Mileage 95,728Top Failure Lamps, Reflectors and Electrical Equipment — 17.2%

2011

71.6%

Age (yrs) 20Tests 437Avg Mileage 93,743Top Failure Lamps, Reflectors and Electrical Equipment — 21.3%

2012

74.6%

Age (yrs) 21Tests 406Avg Mileage 96,112Top Failure Lamps, Reflectors and Electrical Equipment — 16.3%

2013

74.4%

Age (yrs) 22Tests 390Avg Mileage 99,406Top Failure Lamps, Reflectors and Electrical Equipment — 35.1%

2014

76.6%

Age (yrs) 23Tests 393Avg Mileage 99,613Top Failure Lamps, Reflectors and Electrical Equipment — 28.5%

2015

77.0%

Age (yrs) 24Tests 369Avg Mileage 97,561Top Failure Lamps, Reflectors and Electrical Equipment — 36.9%

2016

76.1%

Age (yrs) 25Tests 380Avg Mileage 100,473Top Failure Lamps, Reflectors and Electrical Equipment — 33.2%

2017

78.8%

Age (yrs) 26Tests 358Avg Mileage 96,528Top Failure Lamps, Reflectors and Electrical Equipment — 30.4%

2018

80.8%

Age (yrs) 27Tests 260Avg Mileage 97,286Top Failure Lamps, reflectors and electrical equipment — 16.2%

2019

81.5%

Age (yrs) 28Tests 254Avg Mileage 95,677Top Failure Lamps, reflectors and electrical equipment — 22.0%

2020

79.9%

Age (yrs) 29Tests 229Avg Mileage 96,896Top Failure Lamps, reflectors and electrical equipment — 29.3%

2021

84.2%

Age (yrs) 30Tests 234Avg Mileage 92,702Top Failure Lamps, reflectors and electrical equipment — 25.6%

2022

81.7%

Age (yrs) 31Tests 257Avg Mileage 87,654Top Failure Lamps, reflectors and electrical equipment — 19.8%

2023

84.1%

Age (yrs) 32Tests 289Avg Mileage 85,454Top Failure Lamps, reflectors and electrical equipment — 17.3%

2024

89.9%

Age (yrs) 33Tests 753Avg Mileage 83,193Top Failure Lamps, reflectors and electrical equipment — 12.0%

MOT results for 1991 Porsche 911 by test year
Test Year▲	Age (yrs)▲▼	Pass Rate▲▼	Tests▲▼	Avg Mileage▲▼	Top Failure▲▼
2009	18	69.9%	455	95,868	Lamps, Reflectors and Electrical Equipment — 20.4%
2010	19	73.1%	453	95,728	Lamps, Reflectors and Electrical Equipment — 17.2%
2011	20	71.6%	437	93,743	Lamps, Reflectors and Electrical Equipment — 21.3%
2012	21	74.6%	406	96,112	Lamps, Reflectors and Electrical Equipment — 16.3%
2013	22	74.4%	390	99,406	Lamps, Reflectors and Electrical Equipment — 35.1%
2014	23	76.6%	393	99,613	Lamps, Reflectors and Electrical Equipment — 28.5%
2015	24	77.0%	369	97,561	Lamps, Reflectors and Electrical Equipment — 36.9%
2016	25	76.1%	380	100,473	Lamps, Reflectors and Electrical Equipment — 33.2%
2017	26	78.8%	358	96,528	Lamps, Reflectors and Electrical Equipment — 30.4%
2018	27	80.8%	260	97,286	Lamps, reflectors and electrical equipment — 16.2%
2019	28	81.5%	254	95,677	Lamps, reflectors and electrical equipment — 22.0%
2020	29	79.9%	229	96,896	Lamps, reflectors and electrical equipment — 29.3%
2021	30	84.2%	234	92,702	Lamps, reflectors and electrical equipment — 25.6%
2022	31	81.7%	257	87,654	Lamps, reflectors and electrical equipment — 19.8%
2023	32	84.1%	289	85,454	Lamps, reflectors and electrical equipment — 17.3%
2024	33	89.9%	753	83,193	Lamps, reflectors and electrical equipment — 12.0%

Common MOT Failures

Top failure categories across all test years for 1991 Porsche 911, with age trends.

Lamps, Reflectors and Electrical Equipment

24.7%

↓ Decreases with age

Lamps, reflectors and electrical equipment

20.3%

↓ Decreases with age

Brakes

10.5%

↓ Decreases with age

Suspension

9.6%

— Consistent

Tyres

7.6%

— Consistent

How Failures Change With Age

Comparing failure rates between the youngest and oldest test years.

Category	At Youngest	At Oldest	Change	Trend
Tyres	8.4% (18 yrs)	5.4% (33 yrs)	-3.0%	🟢 ↓

Other Manufacture Years

Looking for the best year to buy? See the full comparison on the Porsche 911 page →

About This Data

This page shows how Porsche 911 cars manufactured in 1991 perform at MOT as they age. Data spans from 2009 to 2024, covering 5,917 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.