MOT performance
Alfa Romeo Giulietta diesel: MOT pass rate and common failures
Of 25,995 MOT tests on diesel Alfa Romeo Giuliettas in 2023–2024 (on average 9.8 years old at test, median 93,886 miles), 64.0% passed first time, against 72.9% of 26,259 petrol Alfa Romeo Giulietta tests. Allowing for age, mileage and fuel, diesel Alfa Romeo Giuliettas failed 11% more often than comparable cars — 1.11× against 1.01× for the Alfa Romeo Giulietta as a whole.
25,995 MOT tests on 13,271 vehicles, 2023–2024 · Source: DVSA (Open Government Licence) · Analysis: 73 Auto
Check a specific car's MOT history and running costsAt a glance
| Figure | Value | Basis |
|---|---|---|
| First-time pass rate | 64.0% | ±0.6 pts (95%), n = 25,995 |
| All Alfa Romeo Giuliettas | 68.4% | n = 52,254 |
| Failures vs similar cars | 1.11× | same age, mileage and fuel = 1.00; Alfa Romeo Giulietta overall 1.01× |
| Tests with a dangerous defect | 11.8% | n = 25,995 |
| Average age at test | 9.8 years | n = 25,995 |
| Registration years covered | 2010–2021 | DVSA first-use date |
Diesel against the other Alfa Romeo Giulietta fuels
Official DVSA test results by fuel, with 73 Auto's adjusted ratio (failures against cars of the same age, mileage and fuel).
| Fuel | Tests | Average age | First-time pass | vs similar cars | Dangerous |
|---|---|---|---|---|---|
| Petrol | 26,259 | 8.9 yrs | 72.9% | -9% | 8.6% |
| Diesel | 25,995 | 9.8 yrs | 64.0% | +11% | 11.8% |
Where diesel Alfa Romeo Giuliettas differ
- Noise, emissions and leaks: diesel Alfa Romeo Giuliettas failed 44% more often than the Alfa Romeo Giulietta overall, relative to comparable cars (1.72× vs 1.19×).
| Area | Diesel (vs similar) | All Alfa Romeo Giuliettas (vs similar) |
|---|---|---|
| Lights, reflectors and electrical | 14.2% (+13%) | 11.8% (-3%) |
| Suspension | 13.3% (+17%) | 11.0% (+7%) |
| Tyres | 10.2% (+36%) | 9.0% (+27%) |
| Brakes | 7.0% (-10%) | 5.9% (-16%) |
| Noise, emissions and leaks | 5.1% (+72%) | 3.7% (+19%) |
| Driver's view of the road | 5.1% (+12%) | 4.8% (+1%) |
| Body, chassis and structure | 2.3% (-37%) | 2.1% (-37%) |
| Seat belts and airbags | 0.9% (-13%) | 0.7% (-20%) |
| Road wheels | 0.5% (+3%) | 0.4% (-11%) |
| Steering | 0.4% (-84%) | 0.3% (-85%) |
| Registration plates and VIN | 0.4% (+1%) | 0.3% (Same) |
Most common diesel Alfa Romeo Giulietta failure items
| Item | Area | Share of tests |
|---|---|---|
| Coil spring: fractured or broken | Suspension | 4.16% |
| Pins and bushes: pin or bush excessively worn | Suspension | 4.11% |
| Tread depth: tread depth below requirements of 1.6mm | Tyres | 3.99% |
| Side repeaters: not working | Lights, reflectors and electrical | 3.85% |
| Condition: has ply or cords exposed | Tyres | 3.01% |
Pass rate by age, by fuel
| Age at test (years) | diesel pass rate (tests) | petrol pass rate (tests) |
|---|---|---|
| 3-4 | 82.5% (743) | 87.0% (1,356) |
| 5-6 | 77.5% (1,965) | 83.6% (3,350) |
| 7-8 | 70.8% (4,728) | 77.3% (6,425) |
| 9-10 | 64.6% (6,067) | 71.9% (6,307) |
| 11-12 | 58.0% (9,629) | 64.2% (6,408) |
| 13-15 | 55.7% (2,708) | 60.6% (2,077) |
Alfa Romeo Giulietta by registration year
Registration-year pages cover every fuel of that year.
- 2010 Alfa Romeo Giulietta · 58.8%
- 2011 Alfa Romeo Giulietta · 58.6%
- 2012 Alfa Romeo Giulietta · 62.9%
- 2013 Alfa Romeo Giulietta · 66.4%
- 2014 Alfa Romeo Giulietta · 70.6%
- 2015 Alfa Romeo Giulietta · 73.4%
- 2016 Alfa Romeo Giulietta · 76.4%
- 2017 Alfa Romeo Giulietta · 81.3%
What this does and doesn't tell you
Fuel is DVSA's recorded fuel type; plug-in and self-charging hybrids are grouped as hybrid. A difference between fuels can come from the engines themselves, or from how the cars are used — diesels typically cover more miles, and the adjusted ratio allows for mileage band but not for every difference in use. For one car, its own MOT history is the better guide: see MOT check.
Check a specific diesel Alfa Romeo Giulietta
Enter a UK registration to see that car's own MOT history and what it is likely to cost to own. Your first check is free and shows the vehicle summary and its headline ownership cost. The category-by-category breakdown is part of a paid check.
UK number plate or 17-character VIN
About this data. These are MOT test results, not a measure of mechanical reliability: a car's MOT outcome reflects its condition on the day, which depends on how it has been maintained and driven as well as how it was built. Figures cover class 4 vehicles (cars and light vans), normal tests only (retests excluded), outcomes pass, fail and pass after rectification at the station; vehicles at least 2.5 years old at test. Tests from 2023-01-01 to 2024-12-30. “Compared with similar cars” means compared with the national rate for cars of the same age, mileage band and fuel. Contains public sector information licensed under the Open Government Licence v3.0. Makes and models are matched to 73 Auto's vehicle catalogue; tests that can't be matched are left out rather than guessed. See how the MOT figures are produced.