Used car guide

2017 Infiniti Q50 diesel: common problems and MOT failures

What MOT testers find on the diesel Infiniti Q50 first registered in 2017 (diesel cars only): we looked at the 1,095 MOTs these cars had during 2023–2025. Plus known faults and what to look at before you buy one.

1,095MOTs of 2017 diesel cars, done in 2023–2025
80%pass first time (all 2017 cars: 80%)
9,200typical miles a year
19.3×the usual rate for anti-roll bar link joints

What goes wrong more than usual on a 2017 Infiniti Q50 diesel?

Parts flagged at MOT more often on the 2017 Infiniti Q50 diesel than on all cars registered in 2017.

  • Anti-roll bar link joints19.3× usual
    Infiniti Q50
    13.5% All 2017 cars
    0.7%

    Failed outright at MOT: 1.6%, against 0.2% 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 joint6.6× usual
    Infiniti Q50
    9.3% All 2017 cars
    1.4%

    Failed outright at MOT: 1.6%, against 0.7% 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.

Better than most

Tyre condition: 6.6% here, against 13.5% of all 2017 cars.

Common 2017 Infiniti Q50 diesel MOT failures and advisories

The share of 2017 Infiniti Q50 diesel MOT tests where testers flagged each area, as a fail or an advisory. Rough prices are typical independent-garage costs.

  • Tyres
    28% 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
    27% 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
    25% 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
    7% 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
    3% of testsRough price £80–£250

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

Questions to ask the seller before buying a 2017 Infiniti Q50 diesel

Ask before you travel to see it. A seller who knows the car will have answers, and receipts.

  1. Any recent work on the anti-roll bar link joints? (Flagged at MOT 19.3× as often on the 2017 Infiniti Q50 diesel as on other cars the same age.)
  2. Any recent work on the ball joint? (Flagged at MOT 6.6× as often on the 2017 Infiniti Q50 diesel as on other cars the same age.)
  3. Can I see the service history and receipts for any big jobs?

Looking at an Infiniti Q50?

Check the actual car: its own MOT history, mileage and what to ask the seller. Free, no sign-up.

Other years

Every year of the Infiniti Q50 compared

YearMOT testsMost flagged
2019–Too few tests
2018761Brakes 29%
20161,891Tyres 30%
20152,236Tyres 31%
20141,195Suspension 33%
2013–Too few tests

Where this comes from: the DVSA's anonymised results for every MOT test done in Great Britain during 2023–2025, counting the MOTs of Infiniti Q50 cars first registered in 2017. "Flagged" includes advisories, so it isn't the same as a fail rate. How we score