Pass rate
94.6%
Above average — 12.5 pts ahead of the 82.1% that cars this age and mileage manage.
Across 204 recorded tests.
Typical repair bill £40–£127
2015 Alfa Romeo 4C MOT pass rate
- 2015
- typical 13,323 mi
Most common fault
Tyres
51.0% of faults · 19.8% nationally
mostly tread below the limit, cuts and sidewall bulges.
Part only £55–£85 for Tread depth below 1.6 mm. What fitting it takes →
Which year to buy
- Best 2015 94.6% pass · this year
- Avoid 2018 84.0% pass
Across the 5 years on record, a spread of 10.6 points. See every year →
- First-attempt pass
- 94.3%
- Typical mileage
- 13k mi
The 2015 Alfa Romeo 4C MOT pass rate is 94.6% of its MOT tests — 12.5 points ahead of what its age and mileage predict. Tyres is the biggest single reason it fails, at 51.0% of what testers record.
Check your postcode
MOT pass rates are national — type your postcode to see how Alfa Romeo 4C does in your corner of the country.
Expert verdict
Tyres: 2.6× the national share
Tyres make up 51.0% of everything recorded on the 2015 Alfa Romeo 4c, against 19.8% nationally — 31.2 points above. Check all four tyres yourself, including the inner shoulders, and look at the date stamp — a tyre can pass on tread and still be six years old.
- Beats its own age and mileage. Once you allow for how old and how far these cars have been driven, the expected pass rate is 82.1% and this one manages 94.6% — 12.5 points ahead of what its age and mileage predict.
- When it fails, it costs. Only 7% of this model’s typical repairs come in under £30 in parts — the failures here tend to be the kind that need a garage rather than a bulb.
Written from this page's own figures: fault shares against the national composition, the like-for-like pass rate, and the priced repair list. How these are worked out
Watching a Alfa Romeo 4C? Get an email when these numbers change .
How does the 2015 Alfa Romeo 4C compare?
Cars of this age and mileage average 82.1%, so this figure is 12.5 points ahead of what its age and mileage predict. On a first attempt, before any retests, the figure drops to 94.3%. The median 2015 Alfa Romeo 4C in this dataset had covered 13,323 mi.
Pass rates also shift with the test month: tests recorded October–March passed 96.5% of the time, April–September 93.2%.
The single most recorded failure item is "Catalyst emissions Lambda reading after 2nd fast idle outside specified limits", noted on 1.47% of tests.
- 204 recorded tests behind this page.
- 94.6% overall pass rate, 94.3% on a first attempt.
- Across every year of the Alfa Romeo 4C, the average is 93.4% — best year 2015 (94.6%), worst 2018 (84.0%).
Figures count every completed test on this vehicle-year in the dataset, including retests. See methodology for the exact definition.
This page's data
- Tests analysed
- 204
- Typical mileage (median)
- 13,323 mi
- Make and model
- Alfa Romeo 4C
- Updated
- 2026-11-05
Source: DVSA anonymised MOT test data (2023–2025), OGL v3.0.
Top part to budget for
Emissions Repair
Typically a garage job — get quotes before committing.
Does mileage affect the 4C MOT pass rate?
Pass rate by odometer reading. Bar lengths start at 83% so small gaps stay visible.
Regional pass rates for the 4C
| Region | Tests | Pass rate |
|---|---|---|
| East of England | 74 | 95.9% |
| South East | 48 | 91.7% |
| East Midlands | 22 | 100.0% |
| Yorkshire | 15 | 86.7% |
Regions come from the postcode area recorded at the test station. Areas on region borders are assigned to the region with the majority of their population.
What fails a 2015 4C
Everything a tester recorded on this vehicle, grouped into the inspection sections that produced it. The notch on each bar is the national share, so you can see at a glance whether this car is unusual or just ordinary.
A test can record several items, so these percentages do not add up to 100%. The exact strings, with prices, are in the full DVSA record at the bottom of this page.
Before your test
Three checks worth doing on a 2015 4C
These are not generic tips — they are the faults recorded most often on this exact model, rewritten as things you can check yourself. All three take about ten minutes and cost nothing.
-
Check the exhaust and emissions 1.5% of tests
“catalyst emissions Lambda reading after 2nd fast idle outside specified limits”
Listen for a blow at idle and have someone rev it gently. Then look at the tailpipe smoke: blue is oil, white when warm is coolant, black is over-fuelling. Any of those and the emissions test is the least of it.
-
Check the tyre tread 1.5% of tests
“tread depth below requirements of 1.6mm”
Check all four tyres cold, including the inner shoulder where wear hides — 1.6mm across the central three-quarters is the legal limit, and most testers fail at 1.6mm without argument.
-
Check the coil springs 0.5% of tests
“coil spring fractured or broken”
Look up inside each wheel arch with a torch, all the way round the spring. A snapped spring usually breaks at the very bottom coil, where a quick glance will not reach.
Shares are the proportion of tests on this vehicle that recorded the item, so they overlap: one test can record several.
What it costs to get a 2015 4C through its MOT
Across the 10 items that are recorded most often on this model, the average repair comes to £40–£127 — and 7% of those repairs are parts that cost under £30.
- Average repair across the 10 common items
- £40–£127
- Cheapest common item: stop lamp not working
- £3–£12
- Dearest common item: catalyst emissions lambda reading after 2nd…
- £60–£250
- Common items a careful owner can do at home
- 70%
- Repairs that still cost under £30
- 7%
Estimates from typical UK parts prices, weighted by how often each item appears in 204 MOT tests on this vehicle. They exclude diagnostics, retest fees and garage labour where the part is a DIY fit, and they are not figures from the DVSA dataset. Older and higher-mileage examples cost more than the average. How these estimates are built → · All MOT repair costs → · Cheapest cars to put through a test →
Every year of the 4C, side by side
5 model years on record, from 2014 to 2018. Across them the pass rate runs from 84.0% to 94.6% — a spread of 10.6 points. The bar under each year is the item that failed it most often.
- 2014 94.3% ball joint dust cover severely…
- 2015 94.6%catalyst emissions lambda reading…
- 2016 92.9% washers provides insufficient…
- 2017 93.8% registration plates does not…
- 2018 84.0% washers provides insufficient…
Colour is the pass rate on a fixed scale, so a block means the same thing on any model. Each year links to its own page with the full fault breakdown.
Compare the 2015 Alfa Romeo 4C with another year
The raw pass rate mostly measures age. The year comparison adds the like-for-like figure, the mileage bands and the repair bill.
Other 2015 cars with a similar record
- Porsche Cayman 94.7%
- Porsche Boxster 94.4%
- Porsche 911 95.5%
- Bentley Continental 95.6%
- Jaguar F-Type 92.9%
- Audi A8 92.7%
Closest pass rates among 2015 cars with at least 2,000 tests, so a small sample cannot flatter itself into the list. See the full rankings: best and worst MOT pass rates.
The full DVSA record for the 2015 Alfa Romeo 4C 10 failure items · 6 advisories · 9 inspection categories · mileage brackets · all of it in the page, none of it above the fold
Every inspection category
Shares of the 49 individual items recorded on this vehicle, and the same share across all cars nationally. A single test can record several items, so a row is not a percentage of tests.
| Category | Items | This car | Nationally | Difference |
|---|---|---|---|---|
| Tyres | 25 | 51.00% | 19.76% | +31.24 |
| Brakes | 7 | 14.30% | 20.89% | −6.59 |
| Identification of the vehicle | 6 | 12.20% | 1.76% | +10.44 |
| Noise, emissions and leaks | 3 | 6.10% | 5.52% | +0.58 |
| Visibility | 3 | 6.10% | 4.97% | +1.13 |
| Lamps, reflectors and electrical equipment | 2 | 4.10% | 12.21% | −8.11 |
| Suspension | 1 | 2.00% | 20.98% | −18.98 |
| Body, chassis, structure | 1 | 2.00% | 5.57% | −3.57 |
| Non-component advisories | 1 | 2.00% | 4.18% | −2.18 |
The exact failure items, in the tester's words
| Recorded item | Severity | Tests | Est. cost |
|---|---|---|---|
| Catalyst emissions Lambda reading after 2nd fast idle outside specified limits Noise, emissions and leaks | Major | 1.5% | £60–250 |
| Tread depth below requirements of 1.6mm Tyres | Major | 1.5% | £45–95 |
| Coil spring fractured or broken Suspension | Major | 0.49% | £25–65 |
| Has a tear, caused by separation or partial failure of its structure Tyres | Major | 0.49% | £45–95 |
| Headlamp aim too high Lamps, reflectors and electrical equipment | Rectified | 0.49% | £30–80 |
| Joints constant velocity boot split or insecure, no longer prevents the ingress of dirt Body, chassis, structure | Major | 0.49% | £80–250 |
| Registration plates does not conform to the specified requirements Identification of the vehicle | Major | 0.49% | £20–80 |
| Registration plates incorrect Identification of the vehicle | Rectified | 0.49% | £20–80 |
| Registration plates missing Identification of the vehicle | Major | 0.49% | £20–80 |
| Stop lamp not working Lamps, reflectors and electrical equipment | Major | 0.49% | £3–12 |
Severity is as recorded: Major and Dangerous fail the test outright; Minor and Advisory do not. Costs are estimates from typical UK parts prices — see how they are built.
What testers noted without failing the car
Advisories are the early warnings — the same parts a year or two before they fail. Reading them is how you tell a car that has been maintained from one that has been patched.
| Recorded item | Severity | Tests | Est. cost |
|---|---|---|---|
| Tread depth below requirements of 1.6mm Tyres | Advisory | 4.9% | £45–95 |
| Has a tear, caused by separation or partial failure of its structure Tyres | Advisory | 2.9% | £45–95 |
| Brake discs in such a condition that it is seriously weakened Brakes | Advisory | 2.0% | £45–110 |
| Has a cut in excess of the requirements deep enough to reach the ply or cords Tyres | Advisory | 1.5% | £45–95 |
| Brake pads less than 1.5 mm thick Brakes | Advisory | 0.98% | £18–45 |
| Registration plates insecure Identification of the vehicle | Advisory | 0.98% | £20–80 |
Pass rate by mileage
| Mileage | Tests | Pass rate | Median odometer |
|---|---|---|---|
| 0-30k | 192 | 94.8% | 13,539 mi |
| 30-60k | 12 | 91.7% | 34,746 mi |
Source: 204 recorded tests on this vehicle-year. Every row above is recomputed from the same DVSA extract as the rest of the page — see the methodology.
2015 4C MOT questions
What is the MOT pass rate for a 2015 Alfa Romeo 4C?
94.6% of the 204 2015 Alfa Romeo 4C tests in this dataset passed, against a national average of 82.1% for cars first used in 2015. First-attempt pass rate: 94.3%.
What are the most common MOT failures on a 2015 Alfa Romeo 4C?
The three most recorded items are catalyst emissions lambda reading after 2nd fast idle outside specified limits (1.47%), tread depth below requirements of 1.6mm (1.47%), coil spring fractured or broken (0.49%). Percentages are the share of tests on this vehicle that recorded the item.
Does mileage affect the 2015 Alfa Romeo 4C MOT pass rate?
Yes. Cars under 30,000 miles passed 94.8% of the time, falling to 91.7% for those over 120,000 miles. The median 2015 Alfa Romeo 4C in this dataset had covered 13,323 mi.
Does the season affect the 2015 Alfa Romeo 4C MOT pass rate?
Tests recorded in the winter months (October–March) passed 96.5% of the time; summer months (April–September) passed 93.2%. Brakes, tyres and lights are tested harder in bad weather, but the difference is small on most models.