At a glance
How 4,291 first tests went in 2025.
- Passed first time
- 55 in every 100
- Did not pass first time
- 45 in every 1001,947 failed first-attempt tests
- The typical car
- 14 yearsabout 110,342 miles
- First tests counted
- 4,291
What failed most often
- Suspension mounting area (rear)12 in every 100 failed tests
- Suspension arm pins and bushes (front)12 in every 100 failed tests
- Side repeater indicators11 in every 100 failed tests
How we count this. Data: UK MOT open data, 2025. Only Class 4 cars on their first MOT of the year are counted. A car that fails and is fixed at the test station still counts as a fail in the first-attempt rate. These are raw results, not adjusted for age, mileage, or peer mix. The MOT does not test engine or gearbox internals.
These are patterns across 2011 Alfa Romeo Giulietta vehicles in 2025, not a prediction that any one car will have them. Faults are grouped by part of the car. They come from MOT defect codes, not manufacturer bulletins, recalls or a diagnosis of any one car.
Suspension
Two faults. The strongest is the suspension mounting area (rear): 9.6 times as often as on similar cars.
Figures below are measured across the 1,945 of 1,947 failed first attempts (99.9%) that recorded an odometer reading in 2025. Mileage is needed to compare like with like.
We only list faults with at least 20 failures and a rate of about 2.0 times that of similar cars, which keeps one-off results out of the list.
Suspension mounting area (rear)
What it means
The load bearing structure within a set distance of a sub-frame, spring or suspension component mounting is a prescribed area. Major applies when its strength or continuity is significantly reduced or it is inadequately repaired. Dangerous applies when it is so weakened that control of the vehicle is likely to be adversely affected.
Also noted as an advisory
Testers also noted it as an advisory, worn but not yet failing, on 62 first tests, 3.1 times as often as on similar cars.
Suspension arm pins and bushes (front)
What it means
Pins and bushes on suspension arms fail as Major when they are excessively worn. They are graded Dangerous when likely to become detached. DVSA uses the same wording for a suspension joint.
Data: UK MOT open data, 2025. Compared with cars of the same age and mileage. Advisories count notes recorded on failed first tests only.
Body and structure
Two faults. The strongest is the vehicle structure condition (rear): 8.9 times as often as on similar cars.
Vehicle structure condition (rear)
What it means
Structure that is fractured, deformed, corroded, modified or inadequately repaired is failed on rigidity only if the overall structural rigidity of the vehicle is significantly reduced. Structure that is likely to affect steering or braking adversely is graded Dangerous. Prescribed areas are not covered here, as they are checked under other sections, including brakes and steering.
Also noted as an advisory
Testers also noted it as an advisory, worn but not yet failing, on 25 first tests, 3.7 times as often as on similar cars.
Chassis condition (rear)
What it means
A main load-bearing structural member that is fractured, deformed, modified or inadequately repaired is Major when structural rigidity is significantly reduced, and Dangerous where steering or braking is likely to be adversely affected. Corrosion of the body, cab or chassis at a mounting point is Dangerous where overall security or stability is impaired.
Data: UK MOT open data, 2025. Compared with cars of the same age and mileage. Advisories count notes recorded on failed first tests only.
Lamps and electrical
One fault: side repeater indicators (front), 6.7 times as often as on similar cars.
Side repeater indicators (front)
What it means
Sequential or dynamic direction indicators are not a reason to fail. Where a side repeater is required, it is allowed to be part of the front direction indicator if it has a marked wraparound lens, or an amber light coming through the front lens when viewed from a set distance to the side of the rear bumper. A lens defect with no effect on the emitted light is Minor, and one that adversely affects the light is Major.
Data: UK MOT open data, 2025. Compared with cars of the same age and mileage.
Noise, emissions and leaks
One fault: diesel engine warning light, 2.4 times as often as on similar cars.
Diesel engine warning light
What it means
An engine malfunction indicator lamp that is illuminated to show a malfunction is graded Major on a diesel, but only on the diesels the test covers, which depends on the vehicle type and when it was first used. DVSA lists it under exhaust emissions for compression ignition engines, and the detail line for the row also names an inoperative lamp.
Data: UK MOT open data, 2025. Compared with cars of the same age and mileage.
Advisories
Other things testers noted as worn or close to failing, more often than on similar cars.
An advisory is a note from the tester about something that has not failed yet. It is an early warning, not a fail. Advisories for the faults above are shown with those faults.
Anti-roll bar (rear)
Coil spring (rear)
Brake light
Headlight (front)
Data: UK MOT open data, 2025. Counts cover advisories recorded on failed first tests only, compared with cars of the same age and mileage.
MOT pass rates
How first tests ended, and how the pass rates are counted.
- Passed first time
- 55in every 100
- Passed on the first test.
- Fixed at the station
- 5in every 100
- Failed, then fixed at the test station the same day.
- Failed
- 40in every 100
- Did not pass, and were not fixed at the test station.
First-attempt pass 54.6% of 4,291 first tests (2025): only cars that passed first time count. Official-style pass 60.2%: cars fixed at the test station also count as a pass. The 5 fixed and the 40 not fixed make the 45 in every 100 that did not pass first time.
Petrol and diesel
Figures are in every 100 first tests. Cars with more miles usually fail more often, so the same-mileage figure gives every fuel the mileage mix of all the cars in this year.
Same model, other years
Passed first time in every 100, all tested in 2025.
Newer cars are younger, so look for a jump rather than the climb. A year earlier (2024), when these cars were a year younger, 58 in every 100 passed first time.
| Year | Passed first time | First tests |
|---|---|---|
| 2010 | 55 in every 100 | 1,414 |
| 2011 This car | 55 in every 100 | 4,291 |
| 2012 | 58 in every 100 | 2,978 |
| 2013 | 63 in every 100 | 2,819 |
| 2014 | 66 in every 100 | 2,942 |
| 2015 | 69 in every 100 | 2,872 |
| 2016 | 74 in every 100 | 2,676 |
| 2017 | 77 in every 100 | 1,468 |
| 2018 | 79 in every 100 | 804 |
| 2019 | 80 in every 100 | 496 |
| 2020 | 82 in every 100 | 501 |
If you are buying one
What this year's MOT record means for the decision in front of you.
Mileage matters most on a 2011 Giulietta.
Of 2011 Giulietta vehicles with under 84,000 miles, 65 in every 100 passed their 2025 MOT first time. With 139,000 miles or more, 51 in every 100 did.
Petrol or diesel?
| Typical mileage | Passed first time, as tested | Passed first time, same mileage | |
|---|---|---|---|
| Diesel | 118,894 miles | 52 | 53 |
| Petrol | 96,312 miles | 60 | 58 |
Figures are in every 100 first tests. Part of the gap is mileage: diesel cars have done more miles. Even at the same mileage, petrol passed more often (58 against 53 in every 100).
What to check at your mileage
How often each fault turned up on a failed first test, by the car's mileage. Read it as: what is likely to need looking at on a car like the one in front of you.
| Under 84,000 | 102,000–118,000 | 139,000 and over | |
|---|---|---|---|
| Suspension mounting area (rear) | 3.5 | 5.8 | 7.1 |
| Suspension arm pins and bushes (front) | 2.4 | 7.9 | 5.4 |
| Side repeater indicators | 5.8 | 4.2 | 4.4 |
| Coil spring (front) | 2.9 | 5.1 | 4.1 |
| Tyre condition (front) | 3.8 | 4.6 | 3.7 |
Faults per 100 first tests, by the car's mileage at the test.
When a car fails
of failed cars had one item to fix.
of failed cars had three or more items to fix.
of all first tests had a defect the tester marked dangerous (unsafe to drive away).
Every figure here is a first-attempt MOT rate from DVSA open data for this model line, for cars of this model year tested in 2025. Each mileage band holds a fifth of the tests. MOTs do not test engine or gearbox internals, so this is a pre-purchase checklist, not a full reliability score.
FAQs
Short answers about how to read this model-year guide.
About this data
How this page is built and what it can (and can't) say.
These figures come from UK MOT open data for this model year. We surface common failure patterns against similar cars, not a full reliability score, and not a pass/fail verdict on any individual vehicle.
What we include
UK Class 4 cars only. Normal MOT tests (not retests); first test per vehicle per calendar year; results pass, PRS, or fail.
Same-day repairs
PRS means the car failed items that were fixed at the test station and then passed the same day. We count PRS as a first-attempt fail in headline rates so same-day repairs do not hide problems.
How we compare
We compare this model year with other Class 4 cars of similar age and mileage in the same test year. This model family is left out of the peer group so the car is not measured against itself.
What this does not cover
- MOTs do not cover engine internals, gearboxes, or many electronics; this is not a full reliability score.
- Common faults come from MOT defect stats, not manufacturer TSBs or recalls.
- Age and mileage matching reduces, but does not remove, differences in how cars were used and maintained.
- If the data for a car is too thin to say anything useful, we say so rather than guess.
Contains public sector information licensed under the Open Government Licence v3.0.
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