Family hatchback · 2015–2019 cars
Infiniti Q30 reliability
The Infiniti Q30 fails 14.9% of first MOT tests, 22% fewer MOT fails than the average car its age and mileage, based on 16,932 DVSA MOT tests from 2022 to 2024.
Checking a Infiniti Q30 before you buy?
- first-time MOT fail rate (all cars: 28.4%)
- 14.9%
- first-time MOT fail rate (all cars: 28.4%)
- fails than cars of the same age and mileage
- 22% fewer
- fails than cars of the same age and mileage
- MOT tests analysed, 2022 to 2024
- 16,932
- MOT tests analysed, 2022 to 2024
- typical miles a year, from MOT readings
- 8,500
- typical miles a year, from MOT readings
MOT fail rate by age
How the Infiniti Q30 ages
Each point is the share of Infiniti Q30s of that age that failed their MOT first time, against all cars of the same age.
| Age at MOT (years) | Infiniti Q30 | All cars |
|---|---|---|
| 3 | 9.7% | 12.3% |
| 4 | 11.1% | 14.1% |
| 5 | 13.8% | 16.4% |
| 6 | 14.9% | 19.1% |
| 7 | 17.3% | 22.1% |
| 8 | 17.1% | 25.5% |
By year
The best and worst Infiniti Q30 years
2018 cars come out best and 2017 cars worst, once age and mileage are taken into account.
Common problems
What fails most on a Infiniti Q30
Failures by area, against cars of the same age and mileage.
Fail rate by area
- Tyres4.7%19% below avg
- Lights and electrics3.6%32% below avg
- Suspension3%20% below avg
- Brakes2.8%26% below avg
- Windscreen, wipers and mirrors2%39% below avg
- Exhaust, emissions and leaks1.2%15% below avg
- Wheels0.5%74% above avg
- Seat belts and airbags0.5%24% above avg
- Body, chassis and structure0.2%77% below avg
Average for cars of the same age and mileage
Top MOT failures
- 1
Tyre tread below 1.6mm 1.77% of tests
Tread below 1.6mm is illegal and reduces grip in wet conditions, so the tyre must be replaced.
- 2
Brake pads worn below 1.5mm 1.39% of tests
Pads worn below 1.5mm lose stopping power and can damage discs, so replacement is needed before the car is driven.
- 3
Coil spring fractured or broken 1.18% of tests
A broken coil spring can leave the car sitting low or unstable, so it must be replaced before driving.
- 4
Dipped beam headlamp not working 1.05% of tests
A failed dipped beam makes it hard to see and be seen at night, so the lamp needs fixing before driving.
- 5
Windscreen washer fluid insufficient 0.89% of tests
Washers are not supplying enough liquid, so the windscreen cannot be cleared properly, which is a safety issue.
- 6
Tyre cut reaching ply or cords 0.82% of tests
A cut reaching the ply or cords weakens the tyre and can cause a burst, so it must be replaced.
- 7
Diesel engine warning light faulty 0.65% of tests
A lit or non-working engine warning light can hide faults, so diagnosis is needed before buying.
- 8
Tyre ply or cords exposed 0.6% of tests
Exposed ply or cords can let the tyre fail suddenly, so the tyre must be replaced before the car is driven.
Most common advisories
Not a fail yet, but worth pricing in: these show up on a Infiniti Q30's MOT certificate most often.
- Tyre slightly damaged or cracking12.01%
- Tyre worn close to legal limit11.94%
- Brake pads wearing thin7.49%
- Brake disc pitted or scored6.66%
- Brake discs showing some wear3.51%
- Nail in tyre, monitor2.27%
Before you buy
What to check on a used Infiniti Q30
- 1
Tyre tread below 1.6mm
Tread below 1.6mm is illegal and reduces grip in wet conditions, so the tyre must be replaced.
- 2
Brake pads worn below 1.5mm
Pads worn below 1.5mm lose stopping power and can damage discs, so replacement is needed before the car is driven.
- 3
Coil spring fractured or broken
A broken coil spring can leave the car sitting low or unstable, so it must be replaced before driving.
- 4
Dipped beam headlamp not working
A failed dipped beam makes it hard to see and be seen at night, so the lamp needs fixing before driving.
- 5
Every MOT since new
Look for the faults above coming back year after year: it shows how the car has been looked after.
- 6
The mileage record
A typical Infiniti Q30 covers about 8,500 miles a year. A big gap or a drop between MOTs is a warning sign.
- 7
Finance, stolen and write-off
The records the MOT can't show. A Full Check (£9.99) covers all three before you hand over any money.
Fuel types tested
- Diesel81.4%
- Petrol18.6%
Most common colours
Black, Grey, White, Silver, Blue
Average engine size: 1.7 litres.
Compare
How the Infiniti Q30 compares with its rivals
| Model | Fail rate | Against same-age cars |
|---|---|---|
| Audi S3 | 17.5% | 45% fewer MOT fails than the average car its age |
| Infiniti Q30 | 14.9% | 22% fewer MOT fails than the average car its age |
| Volkswagen e-Golf | 12.4% | 4% fewer MOT fails than the average car its age |
| Peugeot 306 | 43.7% | 10% more MOT fails than the average car its age |
| Hyundai Matrix | 46.8% | 19% more MOT fails than the average car its age |
| Chevrolet Cruze | 39.2% | 19% more MOT fails than the average car its age |
| DS4 | 29.4% | 45% more MOT fails than the average car its age |
Every family hatchback ranked in the family hatchback reliability index, or all Infiniti models.
Questions
Infiniti Q30 questions, answered
Is the Infiniti Q30 reliable?
On MOT results, the Infiniti Q30 is better than average: it fails 14.9% of first MOT tests, 22% fewer MOT fails than the average car its age and mileage. It ranks 7 of 65 family hatchback models in our index.
What fails most on a Infiniti Q30 MOT?
The most common MOT failures on the Infiniti Q30 are tyre tread below 1.6mm (1.77% of tests), brake pads worn below 1.5mm (1.39% of tests), coil spring fractured or broken (1.18% of tests). By area, tyres fails 4.7% of its tests.
Which Infiniti Q30 year is the most reliable?
Among years with 1,000+ tests, 2018 cars do best (27% fewer MOT fails than the average car its age) and 2017 cars do worst (18% fewer MOT fails than the average car its age).
How many miles does a Infiniti Q30 do a year?
A typical Infiniti Q30 covers about 8,500 miles a year, from the mileage recorded at its MOTs. Check the car you're looking at against that with a free mileage check.
How do I check a Infiniti Q30 before I buy it?
Enter its registration for a free check of its MOT history, mileage, ULEZ status and tax. Before you pay, a Full Check (£9.99) shows outstanding finance, stolen and write-off records.
Source: DVSA anonymised MOT test results, 2022 to 2024, class 4 vehicles aged 3 to 25, normal tests only. How we compare like with like: our methodology.
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