1999 Porsche 911 — MOT History by Age

How cars manufactured in 1999 perform at MOT as they age

27 years

Current Age

82.7%

Latest Pass Rate

24,064

Total Tests (All Years)

92,985 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 1999 Porsche 911 as it ages.

10 yrs76.3%

→ ↓1.3%

11 yrs75.0%

→ ↓0.6%

12 yrs74.4%

→ ↓2.3%

13 yrs72.1%

→ ↓1.2%

14 yrs70.9%

→ ↓0.3%

15 yrs70.6%

→ ↑2.9%

16 yrs73.5%

→ ↑0.3%

17 yrs73.8%

→ ↑0.1%

18 yrs73.9%

→ ↑2.3%

19 yrs76.2%

→ ↓0.8%

20 yrs75.4%

→ ↑2.3%

21 yrs77.7%

→ ↓0.8%

22 yrs76.9%

→ ↑1.9%

23 yrs78.8%

→ ↑1.5%

24 yrs80.3%

→ ↑2.4%

25 yrs82.7%

📊 View as table

Age	Pass Rate	Tests
10 yrs	76.3%	1,804
11 yrs	75.0%	1,711
12 yrs	74.4%	1,714
13 yrs	72.1%	1,648
14 yrs	70.9%	1,642
15 yrs	70.6%	1,600
16 yrs	73.5%	1,556
17 yrs	73.8%	1,516
18 yrs	73.9%	1,446
19 yrs	76.2%	1,021
20 yrs	75.4%	1,033
21 yrs	77.7%	952
22 yrs	76.9%	1,339
23 yrs	78.8%	1,075
24 yrs	80.3%	1,246
25 yrs	82.7%	2,761

Pass Rate Trend

How the 1999 Porsche 911 pass rate changes as it ages, from first MOT to most recent.

📊 View as table

Built	Pass Rate	Tests
2024 (25 yrs)	82.7%	2,761
2023 (24 yrs)	80.3%	1,246
2022 (23 yrs)	78.8%	1,075
2021 (22 yrs)	76.9%	1,339
2020 (21 yrs)	77.7%	952
2019 (20 yrs)	75.4%	1,033
2018 (19 yrs)	76.2%	1,021
2017 (18 yrs)	73.9%	1,446
2016 (17 yrs)	73.8%	1,516
2015 (16 yrs)	73.5%	1,556
2014 (15 yrs)	70.6%	1,600
2013 (14 yrs)	70.9%	1,642
2012 (13 yrs)	72.1%	1,648
2011 (12 yrs)	74.4%	1,714
2010 (11 yrs)	75%	1,711
2009 (10 yrs)	76.3%	1,804

Year-by-Year MOT Results

2009

76.3%

Age (yrs) 10Tests 1,804Avg Mileage 64,658Top Failure Lamps, Reflectors and Electrical Equipment — 11.6%

2010

75.0%

Age (yrs) 11Tests 1,711Avg Mileage 67,126Top Failure Lamps, Reflectors and Electrical Equipment — 13.3%

2011

74.4%

Age (yrs) 12Tests 1,714Avg Mileage 72,194Top Failure Lamps, Reflectors and Electrical Equipment — 14.2%

2012

72.1%

Age (yrs) 13Tests 1,648Avg Mileage 73,821Top Failure Lamps, Reflectors and Electrical Equipment — 15.5%

2013

70.9%

Age (yrs) 14Tests 1,642Avg Mileage 77,191Top Failure Brakes — 32.6%

2014

70.6%

Age (yrs) 15Tests 1,600Avg Mileage 79,478Top Failure Brakes — 34.9%

2015

73.5%

Age (yrs) 16Tests 1,556Avg Mileage 80,999Top Failure Brakes — 27.7%

2016

73.8%

Age (yrs) 17Tests 1,516Avg Mileage 83,449Top Failure Brakes — 31.2%

2017

73.9%

Age (yrs) 18Tests 1,446Avg Mileage 87,188Top Failure Brakes — 34.0%

2018

76.2%

Age (yrs) 19Tests 1,021Avg Mileage 87,331Top Failure Brakes — 29.8%

2019

75.4%

Age (yrs) 20Tests 1,033Avg Mileage 87,953Top Failure Brakes — 27.3%

2020

77.7%

Age (yrs) 21Tests 952Avg Mileage 90,591Top Failure Brakes — 24.1%

2021

76.9%

Age (yrs) 22Tests 1,339Avg Mileage 91,636Top Failure Brakes — 27.8%

2022

78.8%

Age (yrs) 23Tests 1,075Avg Mileage 90,969Top Failure Lamps, reflectors and electrical equipment — 25.6%

2023

80.3%

Age (yrs) 24Tests 1,246Avg Mileage 92,789Top Failure Brakes — 24.5%

2024

82.7%

Age (yrs) 25Tests 2,761Avg Mileage 92,985Top Failure Lamps, reflectors and electrical equipment — 14.4%

MOT results for 1999 Porsche 911 by test year
Test Year▲	Age (yrs)▲▼	Pass Rate▲▼	Tests▲▼	Avg Mileage▲▼	Top Failure▲▼
2009	10	76.3%	1,804	64,658	Lamps, Reflectors and Electrical Equipment — 11.6%
2010	11	75.0%	1,711	67,126	Lamps, Reflectors and Electrical Equipment — 13.3%
2011	12	74.4%	1,714	72,194	Lamps, Reflectors and Electrical Equipment — 14.2%
2012	13	72.1%	1,648	73,821	Lamps, Reflectors and Electrical Equipment — 15.5%
2013	14	70.9%	1,642	77,191	Brakes — 32.6%
2014	15	70.6%	1,600	79,478	Brakes — 34.9%
2015	16	73.5%	1,556	80,999	Brakes — 27.7%
2016	17	73.8%	1,516	83,449	Brakes — 31.2%
2017	18	73.9%	1,446	87,188	Brakes — 34.0%
2018	19	76.2%	1,021	87,331	Brakes — 29.8%
2019	20	75.4%	1,033	87,953	Brakes — 27.3%
2020	21	77.7%	952	90,591	Brakes — 24.1%
2021	22	76.9%	1,339	91,636	Brakes — 27.8%
2022	23	78.8%	1,075	90,969	Lamps, reflectors and electrical equipment — 25.6%
2023	24	80.3%	1,246	92,789	Brakes — 24.5%
2024	25	82.7%	2,761	92,985	Lamps, reflectors and electrical equipment — 14.4%

Common MOT Failures

Top failure categories across all test years for 1999 Porsche 911, with age trends.

Brakes

23.2%

↑ Increases with age

Lamps, reflectors and electrical equipment

21.7%

— Consistent

Lamps, Reflectors and Electrical Equipment

19.4%

↓ Decreases with age

Suspension

13.8%

↑ Increases with age

Tyres

13.6%

— Consistent

How Failures Change With Age

Comparing failure rates between the youngest and oldest test years.

Category	At Youngest	At Oldest	Change	Trend
Suspension	4.8% (10 yrs)	10.2% (25 yrs)	+5.4%	🔴 ↑
Brakes	10.0% (10 yrs)	14.2% (25 yrs)	+4.2%	🔴 ↑
Tyres	10.3% (10 yrs)	8.0% (25 yrs)	-2.3%	🟢 ↓

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 1999 perform at MOT as they age. Data spans from 2009 to 2024, covering 24,064 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.