MOT cost .

Infiniti

Q30

5,422 MOT tests analysed. sits above the UK fleet average — here's where Q30s pass, fail, and end up on the retest sheet.

That's 10.0 points above the UK fleet average across our 1,988 tracked models — a confident result.

Pass

85.7%

Pass-after-fix

2.5%

Fail

11.4%

Avg miles

51,858

Pass + Pass-after-fix + Fail = 100%

The picture

Q30: a strong MOT record by UK norms

Across 5,422 MOT tests, the Q30 returns 85.7% first-time pass — comfortably ahead of the UK fleet average. The single most-logged Major fail is tyre tread under the limit. Brake pads worn below 1.5 mm and a broken or weak spring round out the top three. Average tested mileage sits at 51,858, which is the lens to read those failure rankings through. If you own one and the next test is close, the ranked list below is a sensible pre-test checklist.

Top ten reasons for rejection.

  1. 01

    Tyre tread depth not in accordance with the requirements

    139 occurrences · 2.6% of tests

  2. 02

    a brake lining or pad worn below 1.5mm

    90 occurrences · 1.7% of tests

  3. 03

    A spring or spring component fractured or seriously weakened

    66 occurrences · 1.2% of tests

  4. 04

    Windscreen or window damaged or seriously discoloured but not adversely affecting driver's view

    61 occurrences · 1.1% of tests

  5. 05

    A suspension joint dust cover missing or no longer prevents the ingress of dirt etc

    58 occurrences · 1.1% of tests

  6. 06

    A headlamp or light source missing, inoperative or more than ½ not functioning in the case of LED

    53 occurrences · 1.0% of tests

  7. 07

    A suspension joint dust cover severely deteriorated

    51 occurrences · 0.9% of tests

  8. 08

    A tyre cords visible or damaged

    49 occurrences · 0.9% of tests

  9. 09

    A lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning

    43 occurrences · 0.8% of tests

  10. 10

    Windscreen washers not working or not providing sufficient fluid to clear the windscreen

    41 occurrences · 0.8% of tests

Counts cover Major and Dangerous defects logged at test. Advisory items excluded so this shows why a car was rejected, not just what the tester flagged in passing.

Worst-case fix budget · top 4 failures

£300–£735

If every one of this Q30's most-logged Major fails hit at the same MOT, that's the real-world UK garage range. Reality is usually one or two items, not all of them. Open the estimator →

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Build your own retest budget.

Tools that pre-empt a retest.

Picked against this car's top failure patterns. Affiliate links to Amazon UK — we earn a small cut at no cost to you. Disclosed up-front, doesn't shape the data.

Item 01 · Amazon UK

Digital tyre-tread depth gauge

Five quid for a gauge beats £150 for a retest. UK MOT minimum is 1.6mm — most testers fail anything below 2mm to be safe.

Search Amazon UK

Item 02 · Amazon UK

Brake pad measurement gauge

Testers fail pads under 1.5mm. A wear gauge tells you if you've got two months left or two weeks.

Search Amazon UK

Buying or keeping a Q30?

Use the failure ranking as a pre-test checklist or a haggling lever. Treat the headline pass rate as a fleet-wide trend, not a guarantee on any individual car.

If you own a Q30 and your last MOT looked nothing like the ranked failures above, that's normal — individual cars vary widely. The ranking shows the patterns testers flag most often across the country.