Used car guide

2017 Infiniti Q30: common problems and what to check

What gets flagged at MOT on 2017 Infiniti Q30s, from 2,554 tests in 2025, plus known faults and what to look at before you buy one.

2,554MOT tests in 2025
78%pass first time (all 2017 cars: 78%)
7,700typical miles a year
12.2×the usual rate for link ball joint covers

What stands out

Parts flagged at MOT more often on 2017 Infiniti Q30s than on all cars registered in 2017.

  • Link ball joint covers12.2× usual
    Infiniti Q30
    6.1% All 2017 cars
    0.5%

    Failed outright at MOT: 3.1%, against 0.3% of all 2017 cars. The rest were advisories or minor defects.

    Rough price £60–£150 (one joint) ClickMechanic

    At the viewing: Listen for knocking over bumps and check the rubber boots behind the wheels aren't split.

  • Sidelights3.6× usual
    Infiniti Q30
    3.6% All 2017 cars
    1%

    Failed outright at MOT: 1.5%, against 0.8% of all 2017 cars. The rest were advisories or minor defects.

    Rough price £10–£80 our estimate

    At the viewing: Ask a friend to check every light while you work the switches: indicators, brake lights, fog lights and reversing lights.

  • Ball joint dust cover2.1× usual
    Infiniti Q30
    2.9% All 2017 cars
    1.4%

    Failed outright at MOT: 1.1%, against 0.5% of all 2017 cars. The rest were advisories or minor defects.

    Rough price £60–£150 (one joint) ClickMechanic

    At the viewing: Listen for knocking over bumps and check the rubber boots behind the wheels aren't split.

By area

The share of 2017 Infiniti Q30 MOT tests where testers flagged each area, as a fail or an advisory. Rough prices are typical independent-garage costs.

  • Tyres
    33% of testsRough price £70–£150

    At the viewing: Check the tread on all four tyres, including the inside edges, and look for cracks or bulges.

  • Brakes
    24% of testsRough price £150–£350

    At the viewing: Look for a lip on the disc edges and feel for judder or pulling when braking firmly from about 40mph.

  • Suspension
    17% of testsRough price £120–£400

    At the viewing: Listen for knocks over speed bumps, and look behind each front wheel for a snapped coil spring.

  • Lights and electrics
    9% of testsRough price £10–£80

    At the viewing: Ask a friend to check every light, including brake lights and indicators, while you operate them.

  • Wipers, windscreen and mirrors
    5% of testsRough price £15–£250

    At the viewing: Check for chips in the driver's view, and test the wipers and washers.

  • Seats and seatbelts
    2% of testsRough price £80–£250

    At the viewing: Pull each seatbelt sharply. It should lock, and retract cleanly.

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Other years

YearMOT testsMost flagged
20161,787Tyres 29%

Where this comes from: the DVSA's anonymised results for every MOT test in Great Britain in 2025, counting tests of 2017 Infiniti Q30s registered in 2017. "Flagged" includes advisories, so it isn't the same as a fail rate. How we score