Used car guide

2014 Infiniti Q50: common problems and what to check

What gets flagged at MOT on 2014 Infiniti Q50s, from 387 tests in 2025, plus known faults and what to look at before you buy one.

Small sample: only 387 of these were MOT tested in 2025, so treat the percentages as rough. The known faults below don't depend on it.

387MOT tests in 2025
71%pass first time (all 2014 cars: 69%)
8,600typical miles a year
11.5×the usual rate for anti-roll bar link joints

What stands out

Parts flagged at MOT more often on 2014 Infiniti Q50s than on all cars registered in 2014.

  • Anti-roll bar link joints11.5× usual
    Infiniti Q50
    19.6% All 2014 cars
    1.7%

    Failed outright at MOT: 2.6%, against 0.6% of all 2014 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.

  • Sub-frame3.3× usual
    Infiniti Q50
    8.3% All 2014 cars
    2.5%

    Failed outright at MOT: 1.6%, against 0.1% of all 2014 cars. The rest were advisories or minor defects.

    Rough price £300–£1,000 our estimate

    At the viewing: Look underneath at the frame the suspension bolts to. Flaky rust or holes are expensive to fix.

  • Ball joint2.3× usual
    Infiniti Q50
    9.8% All 2014 cars
    4.2%

    Failed outright at MOT: 1%, against 2.3% of all 2014 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 2014 Infiniti Q50 MOT tests where testers flagged each area, as a fail or an advisory. Rough prices are typical independent-garage costs.

  • Suspension
    37% 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.

  • Tyres
    29% 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
    22% 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
    18% 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.

  • Oil and fluid leaks
    4% of testsRough price £80–£600

    At the viewing: Look under the engine and on the ground where the car is usually parked for fresh oil or fluid.

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Other years

YearMOT testsMost flagged
2018256Brakes 25%
2017407Tyres 32%
2016610Suspension 33%
2015733Suspension 34%

Where this comes from: the DVSA's anonymised results for every MOT test in Great Britain in 2025, counting tests of 2014 Infiniti Q50s registered in 2014. "Flagged" includes advisories, so it isn't the same as a fail rate. How we score