Vauxhall Signum MOT reliability

Vauxhall Signums passed their MOT first time 58% of the time across 865 tests in 2025. 600 are still licensed in Great Britain.

First-time pass rate

58%

MOTs analysed

865

Still licensed (GB)

600

Body type

Hatchback

Pass rate by year of first registration

Older cars fail more often, so compare a car with others of the same age. Years with very few MOTs can show extreme pass rates, even 0% or 100%, so give more weight to years with more tests.

In detail:

First registered

2008 diesel

18 MOTs

These figures come from only 18 MOT tests. With so few cars, a single pass or fail changes the percentages a lot, so treat them as a rough guide rather than a true average.

Passed first time 39%. Typical mileage 150,827 (most between 109,638 and 176,870).

2010: 71% → 2011: 82% → 2012: 71% → 2013: 60% → 2014: 66% → 2015: 57% → 2016: 55% → 2017: 60% → 2018: 56% → 2019: 58% → 2020: 56% → 2021: 52% → 2022: 55% → 2023: 61% → 2024: 52% → 2025: 39%

Most common failures

Linkage ball joints: ball joint excessively worn (16.7%)
Registration plate lamp(s): inoperative in the case of a single lamp or all lamps (11.1%)
Linkage ball joint dust cover: ball joint dust cover no longer prevents the ingress of dirt (11.1%)
Rear fog lamp: not working (11.1%)
Headlamp aim: projected beam image is obviously incorrect (11.1%)

2008 petrol

2 MOTs

These figures come from only 2 MOT tests. With so few cars, a single pass or fail changes the percentages a lot, so treat them as a rough guide rather than a true average.

Passed first time 0%. Typical mileage 91,146 (most between 82,242 and 100,049).

2010: 100% → 2011: 67% → 2012: 75% → 2013: 63% → 2014: 43% → 2015: 43% → 2016: 78% → 2017: 67% → 2018: 43% → 2019: 50% → 2020: 50% → 2021: 67% → 2022: 50% → 2023: 67% → 2024: 0% → 2025: 0%

Most common failures

Joints: constant velocity boot split or insecure, no longer prevents the ingress of dirt (50.0%)
Pins and bushes: pin or bush excessively worn (50.0%)
Catalyst emissions: Lambda reading after 2nd fast idle outside specified limits (50.0%)
Headlamp: light intensity severely reduced (50.0%)
Condition: has ply or cords exposed (50.0%)

Where 2008 Signums fail

Lights & electrics

38.9%

Brakes

22.2%

Suspension & axles

22.2%

Body, structure & corrosion

16.7%

Exhaust, emissions & leaks

16.7%

Visibility & wipers

5.6%

Looking at a particular car?

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Based on 2025 initial MOT tests in DVSA's anonymised MOT dataset (cars and light vans). Contains public sector information licensed under the Open Government Licence v3.0. Model details: Vehicle data by VehiclesDB.