1989 Porsche 928 — MOT History by Age

How cars manufactured in 1989 perform at MOT as they age

37 years

Current Age

76.4%

Latest Pass Rate

2,222

Total Tests (All Years)

118,191 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 1989 Porsche 928 as it ages.

20 yrs75.1%

→ ↓8.0%

21 yrs67.1%

→ ↓0.4%

22 yrs66.7%

→ ↓0.2%

23 yrs66.5%

→ ↑1.7%

24 yrs68.2%

→ ↓4.4%

25 yrs63.8%

→ ↑13.3%

26 yrs77.1%

→ ↓4.7%

27 yrs72.4%

→ ↑6.5%

28 yrs78.9%

→ ↓1.5%

29 yrs77.4%

→ ↓5.8%

30 yrs71.6%

→ ↑10.9%

31 yrs82.5%

→ ↓9.9%

32 yrs72.6%

→ ↑0.9%

33 yrs73.5%

→ ↑8.4%

34 yrs81.9%

→ ↓5.5%

35 yrs76.4%

📊 View as table

Age	Pass Rate	Tests
20 yrs	75.1%	177
21 yrs	67.1%	161
22 yrs	66.7%	159
23 yrs	66.5%	158
24 yrs	68.2%	151
25 yrs	63.8%	149
26 yrs	77.1%	140
27 yrs	72.4%	152
28 yrs	78.9%	133
29 yrs	77.4%	84
30 yrs	71.6%	95
31 yrs	82.5%	80
32 yrs	72.6%	117
33 yrs	73.5%	98
34 yrs	81.9%	105
35 yrs	76.4%	263

Pass Rate Trend

How the 1989 Porsche 928 pass rate changes as it ages, from first MOT to most recent.

📊 View as table

Built	Pass Rate	Tests
2024 (35 yrs)	76.4%	263
2023 (34 yrs)	81.9%	105
2022 (33 yrs)	73.5%	98
2021 (32 yrs)	72.6%	117
2020 (31 yrs)	82.5%	80
2019 (30 yrs)	71.6%	95
2018 (29 yrs)	77.4%	84
2017 (28 yrs)	78.9%	133
2016 (27 yrs)	72.4%	152
2015 (26 yrs)	77.1%	140
2014 (25 yrs)	63.8%	149
2013 (24 yrs)	68.2%	151
2012 (23 yrs)	66.5%	158
2011 (22 yrs)	66.7%	159
2010 (21 yrs)	67.1%	161
2009 (20 yrs)	75.1%	177

Year-by-Year MOT Results

2009

75.1%

Age (yrs) 20Tests 177Avg Mileage 109,623Top Failure Lamps, Reflectors and Electrical Equipment — 16.4%

2010

67.1%

Age (yrs) 21Tests 161Avg Mileage 109,779Top Failure Lamps, Reflectors and Electrical Equipment — 22.4%

2011

66.7%

Age (yrs) 22Tests 159Avg Mileage 110,299Top Failure Lamps, Reflectors and Electrical Equipment — 22.0%

2012

66.5%

Age (yrs) 23Tests 158Avg Mileage 110,302Top Failure Lamps, Reflectors and Electrical Equipment — 22.2%

2013

68.2%

Age (yrs) 24Tests 151Avg Mileage 110,391Top Failure Brakes — 33.1%

2014High Fail Rate

63.8%

Age (yrs) 25Tests 149Avg Mileage 109,333Top Failure Lamps, Reflectors and Electrical Equipment — 45.0%

2015

77.1%

Age (yrs) 26Tests 140Avg Mileage 110,609Top Failure Lamps, Reflectors and Electrical Equipment — 25.7%

2016

72.4%

Age (yrs) 27Tests 152Avg Mileage 113,629Top Failure Lamps, Reflectors and Electrical Equipment — 31.6%

2017

78.9%

Age (yrs) 28Tests 133Avg Mileage 109,784Top Failure Suspension — 18.8%

2018

77.4%

Age (yrs) 29Tests 84Avg Mileage 111,053Top Failure Suspension — 21.4%

2019

71.6%

Age (yrs) 30Tests 95Avg Mileage 110,491Top Failure Lamps, reflectors and electrical equipment — 32.6%

2020

82.5%

Age (yrs) 31Tests 80Avg Mileage 117,854Top Failure Lamps, reflectors and electrical equipment — 11.3%

2021

72.6%

Age (yrs) 32Tests 117Avg Mileage 113,969Top Failure Lamps, reflectors and electrical equipment — 31.6%

2022

73.5%

Age (yrs) 33Tests 98Avg Mileage 114,041Top Failure Lamps, reflectors and electrical equipment — 23.5%

2023

81.9%

Age (yrs) 34Tests 105Avg Mileage 110,751Top Failure Lamps, reflectors and electrical equipment — 27.6%

2024

76.4%

Age (yrs) 35Tests 263Avg Mileage 118,191Top Failure Lamps, reflectors and electrical equipment — 19.0%

MOT results for 1989 Porsche 928 by test year
Test Year▲	Age (yrs)▲▼	Pass Rate▲▼	Tests▲▼	Avg Mileage▲▼	Top Failure▲▼
2009	20	75.1%	177	109,623	Lamps, Reflectors and Electrical Equipment — 16.4%
2010	21	67.1%	161	109,779	Lamps, Reflectors and Electrical Equipment — 22.4%
2011	22	66.7%	159	110,299	Lamps, Reflectors and Electrical Equipment — 22.0%
2012	23	66.5%	158	110,302	Lamps, Reflectors and Electrical Equipment — 22.2%
2013	24	68.2%	151	110,391	Brakes — 33.1%
2014	25	63.8%	149	109,333	Lamps, Reflectors and Electrical Equipment — 45.0%
2015	26	77.1%	140	110,609	Lamps, Reflectors and Electrical Equipment — 25.7%
2016	27	72.4%	152	113,629	Lamps, Reflectors and Electrical Equipment — 31.6%
2017	28	78.9%	133	109,784	Suspension — 18.8%
2018	29	77.4%	84	111,053	Suspension — 21.4%
2019	30	71.6%	95	110,491	Lamps, reflectors and electrical equipment — 32.6%
2020	31	82.5%	80	117,854	Lamps, reflectors and electrical equipment — 11.3%
2021	32	72.6%	117	113,969	Lamps, reflectors and electrical equipment — 31.6%
2022	33	73.5%	98	114,041	Lamps, reflectors and electrical equipment — 23.5%
2023	34	81.9%	105	110,751	Lamps, reflectors and electrical equipment — 27.6%
2024	35	76.4%	263	118,191	Lamps, reflectors and electrical equipment — 19.0%

Common MOT Failures

Top failure categories across all test years for 1989 Porsche 928, with age trends.

Lamps, Reflectors and Electrical Equipment

23.9%

↓ Decreases with age

Lamps, reflectors and electrical equipment

22.5%

↑ Increases with age

Brakes

16.2%

— Consistent

Suspension

15.0%

— Consistent

Tyres

13.2%

↑ Increases with age

How Failures Change With Age

Comparing failure rates between the youngest and oldest test years.

Category	At Youngest	At Oldest	Change	Trend
Suspension	7.9% (20 yrs)	5.3% (35 yrs)	-2.6%	🟢 ↓
Brakes	9.0% (20 yrs)	9.5% (35 yrs)	+0.5%	⚪ —

Other Manufacture Years

1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995

← Back to Porsche 928 overview

Looking for the best year to buy? See the full comparison on the Porsche 928 page →

About This Data

This page shows how Porsche 928 cars manufactured in 1989 perform at MOT as they age. Data spans from 2009 to 2024, covering 2,222 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.