Used car guide

2017 Infiniti Q50: common problems and what to check

What gets flagged at MOT on 2017 Infiniti Q50s, from 407 tests in 2025, plus known faults and what to look at before you buy one.

Small sample: only 407 of these were MOT tested in 2025, so treat the percentages as rough. The known faults below don't depend on it.

407MOT tests in 2025
76%pass first time (all 2017 cars: 78%)
9,100typical miles a year
21.5×the usual rate for anti-roll bar link joints

What stands out

Parts flagged at MOT more often on 2017 Infiniti Q50s than on all cars registered in 2017.

  • Anti-roll bar link joints21.5× usual
    Infiniti Q50
    17.2% All 2017 cars
    0.8%

    Failed outright at MOT: 3.2%, 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.

  • Ball joint5.9× usual
    Infiniti Q50
    11.3% All 2017 cars
    1.9%

    Failed outright at MOT: 1.5%, against 0.9% 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 Q50 MOT tests where testers flagged each area, as a fail or an advisory. Rough prices are typical independent-garage costs.

  • Tyres
    32% 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.

  • Suspension
    31% 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.

  • Brakes
    29% 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.

  • Lights and electrics
    8% 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
    6% 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
    4% of testsRough price £80–£250

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

Looking at an Infiniti Q50?

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Other years

YearMOT testsMost flagged
2018256Brakes 25%
2016610Suspension 33%
2015733Suspension 34%
2014387Suspension 37%

Where this comes from: the DVSA's anonymised results for every MOT test in Great Britain in 2025, counting tests of 2017 Infiniti Q50s registered in 2017. "Flagged" includes advisories, so it isn't the same as a fail rate. How we score