2020 · 4 years old at test · Petrol mostly

2020 Mercedes-Benz GLA MOT pass rate and common faults

8,850 MOT tests in 2024. 91.0% passed first time, compared with 86.9% for all cars the same age.

105Above average
Passed first time91.0%
Failed or needed repairs9.1%
Typical mileage at test27,000

Most common reasons for failing

Share of all 8,850 tests where this item caused a failure.

  1. Tyres - condition: has a cut in excess of the requirements deep enough to reach the ply or cords1.7%
  2. Tread depth below requirements of 1.6mm1.2%
    168 marked dangerous
  3. Wipers: does not clear the windscreen effectively1.1%
  4. Brake pads: less than 1.5 mm thick1.1%
    129 marked dangerous
  5. Headlamp aim: too low0.5%
  6. Brake pads: worn down to wear indicator0.4%
  7. Tyres - condition: has a bulge, caused by separation or partial failure of its structure0.4%
    48 marked dangerous
  8. Tyres - condition: has ply or cords exposed0.4%
    48 marked dangerous
  9. Headlamp aim: too high0.4%

Problem areas

Failure items found per 100 tests, by part of the car.

  1. Tyres4.4%
  2. Brakes2.0%
  3. Visibility (wipers, screen, mirrors)1.8%
  4. Lights & electrics1.4%
  5. Suspension0.5%
  6. Emissions & leaks0.4%
  7. Seat belts & airbags0.3%
  8. Body & chassis0.3%

Most common advisories

Not failures yet, but things the tester warned about.

  1. Tread depth below requirements of 1.6mm11.6%
  2. Brake pads: less than 1.5 mm thick6.9%
  3. Tyres - condition: has a tear, caused by separation or partial failure of its structure6.7%
  4. Non-component advisories: Child Seat fitted not allowing full inspection of adult belt2.6%
  5. Non-component advisories: Nail in tyre2.5%

What this means if you are buying one

This model year does better than most cars its age, so it is a reasonable used buy on MOT record alone. Before buying, check the area that fails most: tyres - condition: has a cut in excess of the requirements deep enough to reach the ply or cords. Then look up the car's own MOT history on GOV.UK with its number plate, and look for repeat advisories.

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Questions

What is the MOT pass rate for a 2020 Mercedes-Benz GLA?

In 2024, 91.0% of 2020 Mercedes-Benz GLA cars passed their MOT first time, across 8,850 tests. The average for all 4-year-old cars was 86.9%.

What are the most common MOT failures on a 2020 Mercedes-Benz GLA?

The most common failure reasons were tyres - condition: has a cut in excess of the requirements deep enough to reach the ply or cords; tread depth below requirements of 1.6mm; wipers: does not clear the windscreen effectively. The biggest problem area was tyres.

Is the 2020 Mercedes-Benz GLA reliable at MOT time?

Its MOT Rank score is 105, which is above average for a car of its age (100 means exactly average).