1991 Ford Sierra — MOT History by Age

How cars manufactured in 1991 perform at MOT as they age

35 years

Current Age

88.2%

Latest Pass Rate

7,024

Total Tests (All Years)

49,970 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 Ford Sierra as it ages.

18 yrs48.5%

→ ↑3.0%

19 yrs51.5%

→ ↓1.2%

20 yrs50.3%

→ ↑4.8%

21 yrs55.1%

→ ↑5.4%

22 yrs60.5%

→ ↑0.8%

23 yrs61.3%

→ ↑0.3%

24 yrs61.6%

→ ↑2.5%

25 yrs64.1%

→ ↑5.4%

26 yrs69.5%

→ ↑1.1%

27 yrs70.6%

→ ↑7.5%

28 yrs78.1%

→ ↑3.7%

29 yrs81.8%

→ ↑0.3%

30 yrs82.1%

→ ↑0.6%

31 yrs82.7%

→ ↑3.1%

32 yrs85.8%

→ ↑2.4%

33 yrs88.2%

📊 View as table

Age	Pass Rate	Tests
18 yrs	48.5%	1,225
19 yrs	51.5%	849
20 yrs	50.3%	620
21 yrs	55.1%	445
22 yrs	60.5%	347
23 yrs	61.3%	287
24 yrs	61.6%	255
25 yrs	64.1%	223
26 yrs	69.5%	452
27 yrs	70.6%	299
28 yrs	78.1%	292
29 yrs	81.8%	242
30 yrs	82.1%	330
31 yrs	82.7%	255
32 yrs	85.8%	295
33 yrs	88.2%	608

Pass Rate Trend

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

📊 View as table

Built	Pass Rate	Tests
2024 (33 yrs)	88.2%	608
2023 (32 yrs)	85.8%	295
2022 (31 yrs)	82.7%	255
2021 (30 yrs)	82.1%	330
2020 (29 yrs)	81.8%	242
2019 (28 yrs)	78.1%	292
2018 (27 yrs)	70.6%	299
2017 (26 yrs)	69.5%	452
2016 (25 yrs)	64.1%	223
2015 (24 yrs)	61.6%	255
2014 (23 yrs)	61.3%	287
2013 (22 yrs)	60.5%	347
2012 (21 yrs)	55.1%	445
2011 (20 yrs)	50.3%	620
2010 (19 yrs)	51.5%	849
2009 (18 yrs)	48.5%	1,225

Year-by-Year MOT Results

2009High Fail Rate

48.5%

Age (yrs) 18Tests 1,225Avg Mileage 49,319Top Failure Suspension — 31.3%

2010High Fail Rate

51.5%

Age (yrs) 19Tests 849Avg Mileage 50,840Top Failure Suspension — 27.3%

2011High Fail Rate

50.3%

Age (yrs) 20Tests 620Avg Mileage 52,128Top Failure Suspension — 29.2%

2012High Fail Rate

55.1%

Age (yrs) 21Tests 445Avg Mileage 51,662Top Failure Suspension — 27.4%

2013High Fail Rate

60.5%

Age (yrs) 22Tests 347Avg Mileage 51,631Top Failure Suspension — 55.9%

2014High Fail Rate

61.3%

Age (yrs) 23Tests 287Avg Mileage 54,531Top Failure Suspension — 59.6%

2015High Fail Rate

61.6%

Age (yrs) 24Tests 255Avg Mileage 48,777Top Failure Suspension — 54.1%

2016High Fail Rate

64.1%

Age (yrs) 25Tests 223Avg Mileage 51,869Top Failure Suspension — 43.0%

2017

69.5%

Age (yrs) 26Tests 452Avg Mileage 52,183Top Failure Suspension — 40.7%

2018

70.6%

Age (yrs) 27Tests 299Avg Mileage 53,893Top Failure Suspension — 26.4%

2019

78.1%

Age (yrs) 28Tests 292Avg Mileage 57,513Top Failure Suspension — 26.7%

2020

81.8%

Age (yrs) 29Tests 242Avg Mileage 52,558Top Failure Brakes — 17.8%

2021

82.1%

Age (yrs) 30Tests 330Avg Mileage 51,123Top Failure Brakes — 20.6%

2022

82.7%

Age (yrs) 31Tests 255Avg Mileage 53,516Top Failure Suspension — 26.3%

2023

85.8%

Age (yrs) 32Tests 295Avg Mileage 53,729Top Failure Suspension — 21.4%

2024

88.2%

Age (yrs) 33Tests 608Avg Mileage 49,970Top Failure Suspension — 9.5%

MOT results for 1991 Ford Sierra by test year
Test Year▲	Age (yrs)▲▼	Pass Rate▲▼	Tests▲▼	Avg Mileage▲▼	Top Failure▲▼
2009	18	48.5%	1,225	49,319	Suspension — 31.3%
2010	19	51.5%	849	50,840	Suspension — 27.3%
2011	20	50.3%	620	52,128	Suspension — 29.2%
2012	21	55.1%	445	51,662	Suspension — 27.4%
2013	22	60.5%	347	51,631	Suspension — 55.9%
2014	23	61.3%	287	54,531	Suspension — 59.6%
2015	24	61.6%	255	48,777	Suspension — 54.1%
2016	25	64.1%	223	51,869	Suspension — 43.0%
2017	26	69.5%	452	52,183	Suspension — 40.7%
2018	27	70.6%	299	53,893	Suspension — 26.4%
2019	28	78.1%	292	57,513	Suspension — 26.7%
2020	29	81.8%	242	52,558	Brakes — 17.8%
2021	30	82.1%	330	51,123	Brakes — 20.6%
2022	31	82.7%	255	53,516	Suspension — 26.3%
2023	32	85.8%	295	53,729	Suspension — 21.4%
2024	33	88.2%	608	49,970	Suspension — 9.5%

Common MOT Failures

Top failure categories across all test years for 1991 Ford Sierra, with age trends.

Suspension

31.9%

↓ Decreases with age

Brakes

25.7%

↓ Decreases with age

Lamps, Reflectors and Electrical Equipment

24.2%

↑ Increases with age

Lamps, reflectors and electrical equipment

16.5%

↓ Decreases with age

Body, chassis, structure

14.8%

↓ Decreases 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	31.3% (18 yrs)	9.5% (33 yrs)	-21.8%	🟢 ↓
Brakes	24.0% (18 yrs)	8.2% (33 yrs)	-15.8%	🟢 ↓

Other Manufacture Years

1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993

← Back to Ford Sierra overview

Looking for the best year to buy? See the full comparison on the Ford Sierra page →

About This Data

This page shows how Ford Sierra cars manufactured in 1991 perform at MOT as they age. Data spans from 2009 to 2024, covering 7,024 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.