2015 Vauxhall Insignia MOT pass rate: 73.1% (84,609 tests)

2015-registered Vauxhall Insignias passed 73.1% of 84,609 MOT tests in 2023–2025 — 5.6 points worse than same-age cars (78.8%). This is one of the lower-scoring Insignia years after correcting for vehicle age — inspect the individual car carefully.

73.1%Pass rate, 2015 cars

94.4Age-adjusted index (100 = average)

84,609Tests analysed

93,773 miMedian mileage at test

79.6% / 72.6%Petrol vs diesel pass rate

Is the 2015 Insignia getting worse?

Pass rate of 2015-registered cars across recent test years:

Test year	Pass rate
2023	73.2% -7.3 vs same-age
2024	73.8% -4.8 vs same-age
2025	72.3% -4.7 vs same-age

The raw rate normally falls as cars age. The “vs same-age” figure compares this cohort with all UK cars registered in the same year, so normal ageing is not mistaken for a bad model year.

What fails on a 2015 Insignia

#	System	Defects recorded	Share
1	Suspension	14,936	31.3%
2	Tyres	9,927	20.8%
3	Lamps, reflectors and electrical equipment	7,761	16.3%
4	Brakes	7,410	15.5%
5	Visibility	2,692	5.6%
6	Noise, emissions and leaks	2,046	4.3%

All Insignia years compared

Registration year	Tests	Pass rate	Vs same-age	Median mileage
2009	27,619	66.6%	+0.1 pts	112,730
2010	39,441	68.8%	+1.4 pts	113,588
2011	65,919	70.7%	+1.4 pts	111,855
2012	58,708	71.3%	+0.0 pts	112,630
2013	60,965	71.6%	-1.8 pts	108,055
2014	74,523	70.5%	-5.4 pts	104,236
2015 (this page)	84,609	73.1%	-5.6 pts	93,773
2016	66,124	74.4%	-7.0 pts	80,501
2017	46,061	80.8%	-3.2 pts	69,452
2018	37,736	84.7%	-1.7 pts	59,536
2019	23,741	85.5%	-3.0 pts	55,764
2020	3,486	87.7%	-2.3 pts	39,060

Weighing up which year to buy? See the full ranking: Vauxhall Insignia years to avoid.

Buying a 2015 Insignia? Two checks first

Free MOT history checkThe exact car’s failures, advisories and mileage trail — sellers can’t edit it
Topdon OBD2 scannersTopdon diagnostic scanners with full-system readouts
XTOOL diagnostic toolsXTOOL code readers for petrol and diesel cars
Autel UK testersAutel professional-grade diagnostic testers

FAQs

Is a 2015 Vauxhall Insignia reliable?

2015-registered examples passed 73.1% of their MOT tests (84,609 tests, 2023–2025), -5.6 points versus all UK cars registered in the same year. At roughly 11 years old with a median 93,773 miles, condition now varies car by car — always check the individual MOT history.

What mileage is too high for a 2015 Insignia?

The median tested example shows 93,773 miles. Anything far beyond that isn't automatically bad — a motorway-mile car with consistent service records often beats a low-mileage school-run car — but price accordingly and scrutinise the mileage trail for gaps or drops.

Should I buy the petrol or diesel 2015 Insignia?

In this cohort petrols pass 79.6% of tests against 72.6% for diesels. Mileage and use can explain part of that gap, so treat it as a reason to inspect DPF and emissions history, not a fuel-type verdict.

Source: DVSA Anonymised MOT tests and results, 2023–2025 extracts (96 million Class 4 initial tests; retests excluded). Only vehicles old enough for a routine first MOT are included. Age-adjusted figures compare the model-year cohort with all vehicles of the same registration year tested in the same calendar year. Contains public sector information licensed under OGL v3.0.