The MOT Files

Known faults, from the test record

Lexus UX common problems

What fails on the Lexus UX at MOT, which parts are behind it, and how each model year compares. From 16,195 DVSA test records.

Data updated

Quick answer

The Lexus UX's most common MOT problems are tyres, wiper blades and washers, tyre pressure sensors, recorded in 85.3%, 21.4% and 4.6% of failed tests respectively. By model year, 2022 cars pass most often (94.7%) and 2020 cars least (92.4%), 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 Lexus UX 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 16,195 cars.

By component

What wears out on a UX

Failure items grouped by the part behind them, with the share of failed Lexus UX 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

    85.3% 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” — explained32.6%
    • “A tyre cords visible or damaged” — explained18.1%
    • “Tyre tread depth not in accordance with the requirements” — explained17.3%
    • “A tyre seriously damaged” — explained7.5%

    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.Wiper blades and washers

    21.4% of failed tests

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

    • “Wiper blade missing or obviously not clearing the windscreen” — explained17.9%
    • “Windscreen washers not working or not providing sufficient fluid to clear the windscreen” — explained2.1%
    • “Windscreen washers not working or not providing sufficient fluid to clear the windscreen” — explained1.4%

    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

  3. 3.Tyre pressure sensors

    4.6% of failed tests

    Valve-mounted sensors have sealed batteries that expire after roughly seven to ten years; a system fault lamp is a failure on cars first used from 2012.

    • “A tyre pressure monitoring system malfunctioning or obviously inoperative” — explained4.6%

  4. 4.Brake pads and shoes

    4.3% 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” — explained3.8%
    • “Brake lining or pad worn down to wear indicator” — explained0.5%

    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

  5. 5.Brake discs

    1.9% 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 excessively weakened, insecure or fractured” — explained1.1%
    • “Brake disc or drum significantly and obviously worn” — explained0.8%

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

  6. 6.Headlamp aim

    1.8% 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” — explained1.4%
    • “The aim of a headlamp is not within limits laid down in the requirements” — explained0.3%

  7. 7.Registration plates

    1.4% of failed tests

    Plates fade, crack and delaminate; non-standard fonts and spacing fail regardless of condition.

    • “Number plate does not conform to the specified requirements” — explained1.1%
    • “Number plate showing an incorrect registration” — explained0.3%

  8. 8.Mirrors

    1.3% of failed tests

    Knocked off or cracked; a damage item.

    • “Windscreen or window damaged or seriously discoloured and affecting the driver's view of the road or of an obligatory external mirror” — explained1.0%
    • “An obstruction significantly affecting the driver's view of the road through the swept area of the windscreen or an obligatory external mirror not visible” — explained0.3%

By registration year

UX problems by year

MOT pass rate for Lexus UX 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. No single step here is large enough to point at a generation change.

201993%
202092%−0.2
202195%+2.2
202295%+0.2

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 UX owners about

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

Go deeper

The rest of the UX file

Common questions

What are the most common problems with a Lexus UX?
Going by what fails the MOT, tyres (recorded in 85.3% of failed tests), wiper blades and washers (recorded in 21.4% of failed tests), and tyre pressure sensors (recorded in 4.6% of failed tests). These are the items testers actually record across 16,195 tests, not reports from owners, so they describe what goes wrong at the point where it has to be fixed.
Which Lexus UX year is the most reliable?
By MOT pass rate, Lexus UX cars registered in 2022 do best at 94.7% and 2020 cars do worst at 92.4%. 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.
Is the Lexus UX reliable?
The Lexus UX passes 93.7% 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 Lexus UX?
Start with what fails most: tyres, wiper blades and washers, brake pads and shoes. 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