At a glance
How 10,694 first tests went in 2025.
- Passed first time
- 49 in every 100
- Did not pass first time
- 51 in every 1005,422 failed first-attempt tests
- The typical car
- 14 yearsabout 101,801 miles
- First tests counted
- 10,694
What failed most often
- Coil spring (rear)14 in every 100 failed tests
- Handbrake efficiency below minimum (roller test)14 in every 100 failed tests
- Track rod end (front)13 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 Renault Megane vehicles in 2025, not a prediction that any one car will have them. Faults are grouped by part of the car. A wear pattern follows age and use more than the way the car was built. They come from MOT defect codes, not manufacturer bulletins, recalls or a diagnosis of any one car.
Brakes
Two faults and one wear pattern. The strongest is the brake discs (rear): 3.5 times as often as on similar cars.
Figures below are measured across the 5,403 of 5,422 failed first attempts (99.6%) 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.
Brake discs (rear)
What it means
A brake disc or drum must be significantly worn before it is rejected, and being worn below the manufacturer's recommended limits is not a reason in itself. Significantly and obviously worn is Major, as is contamination with oil or grease. A disc or drum that is fractured, insecure, seriously weakened or missing is graded Dangerous.
Also noted as an advisory
Testers also noted it as an advisory, worn but not yet failing, on 891 first tests, 2.3 times as often as on similar cars.
Handbrake performance (roller test, rear)
Handbrake efficiency below minimum (roller test)
What it means
A parking brake with efficiency below the minimum requirement is Major, and graded Dangerous where efficiency is less than half of the required value. On a roller brake tester, the requirement counts as met if more than half of the wheels of a brake system lock. The check applies only to vehicles whose parking brake was not already tested as the secondary brake.
Data: UK MOT open data, 2025. Compared with cars of the same age and mileage. Advisories count notes recorded on failed first tests only.
Suspension
Three faults. The strongest is the coil spring (rear): 3.3 times as often as on similar cars.
Coil spring (rear)
What it means
A missing bump stop rubber is not a reason to fail a coil spring. When the vehicle is jacked and lowered, a spring that does not correctly locate as the suspension returns to its normal running position is rejected as insecurely attached. A missing spring is Major, and graded Dangerous where directional control is affected.
Anti-roll bar ball joint (front)
What it means
On an anti-roll bar ball joint, DVSA fails a suspension pin, bush or joint that is excessively worn as Major. One likely to become detached is graded Dangerous.
Also noted as an advisory
Testers also noted it as an advisory, worn but not yet failing, on 67 first tests, 2.7 times as often as on similar cars.
Anti-roll bar linkage ball joints (front)
What it means
Excessive wear on an anti-roll bar linkage ball joint is Major. A joint likely to become detached is graded Dangerous.
Also noted as an advisory
Testers also noted it as an advisory, worn but not yet failing, on 347 first tests, 3.0 times as often as on similar cars.
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
Two faults. The strongest is the rear fog light: 2.8 times as often as on similar cars.
Rear fog light
What it means
A missing obligatory rear fog lamp, one that is not working, or one that does not emit a steady red light is graded Major. A rear fog lamp adversely affected by the operation of any other lamp is Major too. The manual allows it to go out when main beam is switched on or when dipped beam headlamps are switched off.
Brake light (rear)
What it means
All stop lamps missing or not working is graded Dangerous, and so is a stop lamp that stays on when the brakes are released. A stop lamp that is missing or not working is Major. On some vehicles with LED rear lamps, part of the stop lamp can go out when the rear fog lamp is lit, which is not regarded as a defect.
Also noted as an advisory
Testers also noted it as an advisory, worn but not yet failing, on 88 first tests, 5.7 times as often as on similar cars.
Data: UK MOT open data, 2025. Compared with cars of the same age and mileage. Advisories count notes recorded on failed first tests only.
Steering
One fault: track rod end (front), 2.6 times as often as on similar cars.
Track rod end (front)
What it means
A steering ball joint with excessive wear or free play is Major, and one worn to the extent there is a serious risk of detachment is graded Dangerous. A dust cover that is damaged but still keeps dirt out is Minor, and one missing or no longer keeping dirt out is Major. Testers must tell wear from a joint's built-in clearance or spring loading.
Also noted as an advisory
Testers also noted it as an advisory, worn but not yet failing, on 240 first tests, 2.8 times as often as on similar cars.
Data: UK MOT open data, 2025. Compared with cars of the same age and mileage. Advisories count notes recorded on failed first tests only.
Tyres
One wear pattern: tyre size or type (front), 2.1 times as often as on similar cars.
Tyre size or type (front)
What it means
Tyres of different sizes or different aspect ratios on the same axle, or on twin wheels, are graded Major, as are tyres of different structure on the same axle, such as radial-ply and cross-ply. Steel and fabric radial-ply count as the same structure. The manual treats a standard car tyre and one of a single stated lower aspect ratio as almost identical in size, so that pair is allowed in any mix.
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.
Suspension arm ball joint (front)
Brake performance (plate test, rear)
Side repeater indicators
Shock absorbers
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
- 49in every 100
- Passed on the first test.
- Fixed at the station
- 8in every 100
- Failed, then fixed at the test station the same day.
- Failed
- 43in every 100
- Did not pass, and were not fixed at the test station.
First-attempt pass 49.3% of 10,694 first tests (2025): only cars that passed first time count. Official-style pass 57.2%: cars fixed at the test station also count as a pass. The 8 fixed and the 43 not fixed make the 51 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.
| Year | Passed first time | First tests |
|---|---|---|
| 2000 | 59 in every 100 | 481 |
| 2001 | 56 in every 100 | 1,062 |
| 2002 | 57 in every 100 | 1,570 |
| 2003 | 55 in every 100 | 1,021 |
| 2004 | 53 in every 100 | 709 |
| 2005 | 50 in every 100 | 1,357 |
| 2006 | 48 in every 100 | 2,212 |
| 2007 | 49 in every 100 | 3,895 |
| 2008 | 49 in every 100 | 3,777 |
| 2009 | 47 in every 100 | 6,649 |
| 2010 | 48 in every 100 | 12,546 |
| 2011 This car | 49 in every 100 | 10,694 |
| 2012 | 51 in every 100 | 7,660 |
| 2013 | 52 in every 100 | 6,378 |
| 2014 | 51 in every 100 | 6,391 |
| 2015 | 57 in every 100 | 6,005 |
| 2016 | 66 in every 100 | 4,841 |
| 2017 | 70 in every 100 | 4,856 |
| 2018 | 75 in every 100 | 1,869 |
| 2019 | 77 in every 100 | 2,357 |
| 2020 | 80 in every 100 | 993 |
| 2021 | 84 in every 100 | 718 |
| 2022 | 83 in every 100 | 1,230 |
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 Megane.
Of 2011 Megane vehicles with under 75,000 miles, 56 in every 100 passed their 2025 MOT first time. With 132,000 miles or more, 46 in every 100 did.
Petrol or diesel?
| Typical mileage | Passed first time, as tested | Passed first time, same mileage | |
|---|---|---|---|
| Petrol | 90,420 miles | 49 | 48 |
| Diesel | 116,729 miles | 50 | 52 |
Figures are in every 100 first tests. At the same mileage there is no clear difference between the two.
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 75,000 | 93,000–111,000 | 132,000 and over | |
|---|---|---|---|
| Coil spring (rear) | 7.0 | 8.0 | 7.3 |
| Handbrake efficiency below minimum (roller test) | 2.8 | 7.7 | 11.1 |
| Track rod end (front) | 5.8 | 7.6 | 7.1 |
| Suspension arm ball joint (front) | 3.1 | 6.8 | 6.7 |
| Individual sidelight or tail light (front) | 1.9 | 5.0 | 8.5 |
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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