Used car guide

2017 Mazda 6: common problems and what to check

What gets flagged at MOT on 2017 Mazda 6s, from 4,653 tests in 2025, plus known faults and what to look at before you buy one.

4,653MOT tests in 2025
77%pass first time (all 2017 cars: 78%)
9,000typical miles a year
4.2×the usual rate for rigid brake pipes

What stands out

Parts flagged at MOT more often on 2017 Mazda 6s than on all cars registered in 2017.

  • Rigid brake pipes4.2× usual
    Mazda 6
    5.5% All 2017 cars
    1.3%

    Failed outright at MOT: 0.8%, against 0.2% of all 2017 cars. The rest were advisories or minor defects.

    Rough price £100–£400 our estimate

    At the viewing: Ask to see underneath, or check the MOT advisories: corroded brake or fuel pipes get worse every year and fail the MOT when they do.

  • Suspension arm10.3× usual
    Mazda 6
    3.1% All 2017 cars
    0.3%

    Failed outright at MOT: 0.1%, against 0% of all 2017 cars. The rest were advisories or minor defects.

    Rough price £120–£180 (one arm) ClickMechanic

    At the viewing: Listen for clunks over bumps and feel for the steering wandering. Worn arm bushes show as cracked rubber near the wheels.

  • Sub-frame6.3× usual
    Mazda 6
    2.5% All 2017 cars
    0.4%

    Failed outright at MOT: 0%, against 0% of all 2017 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.

  • Coil springs1.7× usual
    Mazda 6
    5% All 2017 cars
    2.9%

    Failed outright at MOT: 4.2%, against 2% of all 2017 cars. The rest were advisories or minor defects.

    Rough price £175–£400 (pair, one axle) ClickMechanic

    At the viewing: Look behind each wheel for a snapped spring coil, and listen for a clunk or twang when turning the wheel lock to lock with the car stopped.

  • Ball joint1.9× usual
    Mazda 6
    3.6% All 2017 cars
    1.9%

    Failed outright at MOT: 2.3%, 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 Mazda 6 MOT tests where testers flagged each area, as a fail or an advisory. Rough prices are typical independent-garage costs.

  • Tyres
    30% 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
    22% 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
    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
    3% of testsRough price £80–£250

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

Looking at a Mazda 6?

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

Other years

YearMOT testsMost flagged
2022716Tyres 16%
2021658Tyres 23%
20201,048Tyres 24%
20194,395Tyres 27%
20183,210Tyres 29%
20166,752Suspension 30%
20156,282Suspension 36%
20145,727Suspension 41%
20133,778Suspension 44%
20122,571Suspension 45%
20113,366Suspension 45%
20104,225Suspension 49%
20093,024Suspension 51%
20082,532Suspension 52%
20071,782Suspension 57%
2006972Suspension 51%
2005566Suspension 55%

Where this comes from: the DVSA's anonymised results for every MOT test in Great Britain in 2025, counting tests of 2017 Mazda 6s registered in 2017. "Flagged" includes advisories, so it isn't the same as a fail rate. How we score