Used car guide

2021 Ford Focus Active X Edition Mhev: common problems and what to check

What gets flagged at MOT on 2021 Ford Focus Active X Edition Mhevs, from 1,040 tests in 2025, plus known faults and what to look at before you buy one.

1,040MOT tests in 2025
92%pass first time (all 2021 cars: 87%)
7,600typical miles a year
2.7×the usual rate for brake discs

What stands out

Parts flagged at MOT more often on 2021 Ford Focus Active X Edition Mhevs than on all cars registered in 2021.

  • Brake discs2.7× usual
    Ford Focus Active X Edition Mhev
    19% All 2021 cars
    7.1%

    Failed outright at MOT: 0.5%, against 0.3% of all 2021 cars. The rest were advisories or minor defects.

    Rough price £150–£350 our estimate

    At the viewing: Look through the wheel at the brake disc: a deep lip at the edge or heavy scoring means they're worn. Feel for judder when braking.

By area

The share of 2021 Ford Focus Active X Edition Mhev MOT tests where testers flagged each area, as a fail or an advisory. Rough prices are typical independent-garage costs.

  • Tyres
    27% 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
    23% 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
    2% 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
    2% 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.

  • Suspension
    2% 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.

Known faults

Reported by owners, mechanics and buying guides for this model and age. Check which engine the car has, as some apply to one engine only.

  • Timing belt that runs in oil (1.0 EcoBoost)
    1.0 EcoBoost petrol

    The 1.0 EcoBoost’s timing belt sits in the engine oil. Missed or wrong-spec oil changes can make it break down and block the oil pickup, which can wreck the engine.

    At the viewing: Ask for a full service history with regular oil changes, and whether the timing belt has been changed when due.

    If it needs doing: Timing belt (cambelt) change, about £300–£700 (often with the water pump). ClickMechanic

    Source: Bumper: Ford Fiesta reliability guide

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Where this comes from: the DVSA's anonymised results for every MOT test in Great Britain in 2025, counting tests of 2021 Ford Focus Active X Edition Mhevs registered in 2021. "Flagged" includes advisories, so it isn't the same as a fail rate. How we score