The MOT Files

Known faults, from the test record

Seat Arona common problems

What fails on the Seat Arona at MOT, which parts are behind it, and how each model year compares. From 57,243 DVSA test records.

Data updated

Quick answer

The Seat Arona's most common MOT problems are tyres, steering rack and column, brake pads and shoes, recorded in 44.4%, 30.9% and 22.0% of failed tests respectively. By model year, 2022 cars pass most often (89.0%) and 2018 cars least (76.4%), though most of that gap is age. Every figure here is what testers recorded, not what owners reported.

A “common problems” list is usually a forum thread: whoever had the worst day writes the longest post. This one is built the other way, from every Seat Arona that took an MOT last year and what the tester wrote down. It cannot see breakdowns, electrical gremlins or a gearbox that hunts, because the test does not check those. What it can see, it sees across 57,243 cars.

By component

What wears out on a Arona

Failure items grouped by the part behind them, with the share of failed Seat Arona tests recording each. A part can carry several DVSA wordings; they are listed beneath. One failed test often lists several items, so shares do not sum to 100%.

  1. 1.Tyres

    44.4% of failed tests

    Tread wears with every mile and sidewalls age and take kerb damage; the legal minimum is 1.6 mm across the central three-quarters.

    • “A tyre seriously damaged” — explained13.8%
    • “Tyre tread depth not in accordance with the requirements” — explained12.0%
    • “A tyre cords visible or damaged” — explained7.7%
    • “A tyre seriously damaged” — explained7.0%

    Across all cars, tyres failures run at a similar rate at every age, because they are replaced on a cycle rather than wearing out with the car. How long tyres last

  2. 2.Steering rack and column

    30.9% of failed tests

    Rack gaiters split and let dirt in; the rack itself and the column are rarely the failing part.

    • “Steering rack gaiter or ball joint dust cover missing or no longer prevents the ingress of dirt etc” — explained26.0%
    • “Steering rack gaiter or ball joint dust cover missing or no longer prevents the ingress of dirt etc” — explained4.8%

  3. 3.Brake pads and shoes

    22.0% of failed tests

    Friction material wears with use; the MOT limit is 1.5 mm and a pad that thin is close to metal on metal.

    • “a brake lining or pad worn below 1.5mm” — explained20.9%
    • “Brake lining or pad worn down to wear indicator” — explained1.1%

    Across all cars, brake pads and shoes failures run at a similar rate at every age, because they are replaced on a cycle rather than wearing out with the car. How long brake pads and shoes last

  4. 4.Brake discs

    17.4% of failed tests

    Discs thin with each pad set and pit or corrode when lightly used; failure is for significant wear, fracture or insecurity, advisory for surface condition.

    • “Brake disc or drum significantly and obviously worn” — explained8.5%
    • “Excessive fluctuation in brake effort through each wheel revolution.” — explained5.9%
    • “Brake disc or drum excessively weakened, insecure or fractured” — explained3.0%

    Across all cars, brake discs failures climb 3-fold between three and fifteen years, peaking at 12–14 years. How long brake discs last

  5. 5.Wiper blades and washers

    9.8% of failed tests

    Rubber blades harden and split within a year or two; washer jets block and pumps fail.

    • “Windscreen washers not working or not providing sufficient fluid to clear the windscreen” — explained4.1%
    • “Wiper blade missing or obviously not clearing the windscreen” — explained3.6%
    • “Windscreen washers not working or not providing sufficient fluid to clear the windscreen” — explained2.2%

    Across all cars, wiper blades and washers failures run at a similar rate at every age, because they are replaced on a cycle rather than wearing out with the car. How long wiper blades and washers last

  6. 6.Coil springs

    4.4% of failed tests

    Springs fatigue and corrode where the coating chips, then snap, often at the bottom coil; potholes and salt accelerate it.

    • “A spring or spring component fractured or seriously weakened” — explained4.4%

    Across all cars, coil springs failures climb 20-fold between three and fifteen years, peaking at 12–14 years. How long coil springs last

  7. 7.Engine management

    3.4% of failed tests

    The MIL lamp lit is a failure in itself, whatever the stored code; the fault codes section explains what lies behind it.

    • “Engine MIL illuminated indicating a malfunction” — explained2.6%
    • “Engine MIL illuminated indicating a malfunction” — explained0.8%

  8. 8.Headlamp aim

    3.2% of failed tests

    Aim drifts with sagging suspension, a knocked lamp or a botched bulb change; adjustment, not a part.

    • “The aim of a headlamp is not within limits laid down in the requirements” — explained1.3%
    • “The aim of a headlamp is not within limits laid down in the requirements” — explained1.0%
    • “The aim of a headlamp is not within limits laid down in the requirements” — explained1.0%

By registration year

Arona problems by year

MOT pass rate for Seat Arona cars by the year they were first registered, from years with at least 1,000 tests. Every car in a row is the same age, so the rate is raw. Neighbouring years differ by a year of wear — a step of a point or two is age. The step at 2019, up 6.9 points, is larger than wear explains and most likely marks a change in the cars themselves.

201876%
201983%+6.9
202087%+3.8
202188%+1.4
202289%+0.5

Last column: change on the previous year, in points. Years registered within the last three years have not yet been tested and are not shown.

Before it fails

What testers warn Arona owners about

Advisories are the same parts a year or two earlier. Share of all Seat Arona tests carrying an advisory for each.

Go deeper

The rest of the Arona file

Common questions

What are the most common problems with a Seat Arona?
Going by what fails the MOT, tyres (recorded in 44.4% of failed tests), steering rack and column (recorded in 30.9% of failed tests), and brake pads and shoes (recorded in 22.0% of failed tests). These are the items testers actually record across 57,243 tests, not reports from owners, so they describe what goes wrong at the point where it has to be fixed.
Which Seat Arona year is the most reliable?
By MOT pass rate, Seat Arona cars registered in 2022 do best at 89.0% and 2018 cars do worst at 76.4%. Most of that ordering is simply age — newer cars pass more — so read the year table for steps larger than a couple of points between neighbouring years; those mark a change in the cars rather than the calendar. The largest such step is at 2019, up 6.9 points on 2018.
Is the Seat Arona reliable?
The Seat Arona passes 84.2% of MOTs unadjusted; its fleet is too narrow in age or mileage for a fair national comparison. An MOT measures roadworthiness on the day rather than breakdowns or running costs, so this is a reliability measure in the narrow sense: how often the car meets the legal standard, and what stops it.
What should I check when buying a used Seat Arona?
Start with what fails most: tyres, brake pads and shoes, brake discs. Then read the car's own MOT history for advisories carried year to year without repair — the model tells you what to expect, the history tells you whether this owner dealt with it.

Analysis built from DVSA data of