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2020 MG ZS: MOT pass rate and common faults

12,474 initial MOT tests in 2025 on cars first used in 2020 · DVSA data · For guidance only · How we count

81.1%passed first time

Share of initial MOT tests passed with no repairs. Repairs made at the test centre count as a fail. 95% range 80.4% to 81.8% (±0.7 points).

That is 4.9 points below the average for all vehicles first used in 2020 (86.0%). These cars were about 5 years old at the test.

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Failure areas compared with all 2020 vehicles

Compared with all vehicles first used in 2020, failures are more common in tyres (1.2×), lights and electrics (1.9×) and brakes (1.9×), and less common in windscreen, wipers, mirrors (0.9×). Other differences are within the margin of error.

Failed tests with a fault in each area, per 100 tests. The right-hand column shows how many times as often as all vehicles first used in 2020.

  1. Tyres6.4 in 100 tests1.2× compared with 5.1 in 100 for all vehicles first used in 2020
  2. Lights and electrics5.5 in 100 tests1.9× compared with 3.0 in 100 for all vehicles first used in 2020
  3. Brakes4.6 in 100 tests1.9× compared with 2.4 in 100 for all vehicles first used in 2020
  4. Windscreen, wipers, mirrors2.5 in 100 tests0.9× compared with 2.8 in 100 for all vehicles first used in 2020
  5. Noise, emissions, leaks1.8 in 100 tests– no reliable figure for all vehicles first used in 2020
  6. Suspension1.7 in 100 tests– no reliable figure for all vehicles first used in 2020
  7. Steering0.7 in 100 tests– no reliable figure for all vehicles first used in 2020

All vehicles first used in 2020: the 212 models in our data, 1,688,603 tests (96.0% of all 1,758,903 tests on vehicles first used in 2020). Areas with fewer than 50 failures in a model aren't published, so an area is only compared when that leaves the all-vehicles figure at most 10% short; otherwise it shows –.

Typical mileage at test34,400

Median odometer reading at the 2025 MOT test, in miles. Half had more and half had less.

After an MOT advisory

2020 MG ZS cars that passed their 2024 MOT first time with an advisory, and what their next MOT found, against similar cars that passed with nothing noted in that area. Only cars first used in 2020.

Tyres

Of 2020 MG ZS cars that passed their 2024 MOT with a tyre advisory and came back for their next MOT 10–14 months later, 10.1% failed on tyres, against 5.7% of similar cars with nothing noted. Based on 1,597 and 6,238 cars.

  • With a tyre advisory10.1%
  • Similar cars, nothing noted5.7%

Cars not tested again in that window are not included: 11.9% of those with a tyre advisory and 11.6% of the others.

Brakes

Of 2020 MG ZS cars that passed their 2024 MOT with a brake advisory and came back for their next MOT 10–14 months later, 8.7% failed on brakes, against 3.3% of similar cars with nothing noted. Based on 1,308 and 6,527 cars.

  • With a brake advisory8.7%
  • Similar cars, nothing noted3.3%

Cars not tested again in that window are not included: 10.2% of those with a brake advisory and 12.0% of the others.

Similar cars are the same model, first-use year and mileage band. Areas are the DVSA's top-level groups, so the later fail may not be the fault that was advised. These figures describe what happened to these cars. They don't show what a repair would have changed.

MG ZS, all first-use years togetherHow we worked this outAll models compared, with the data

What MOT data can't tell you about any 2020 MG ZS

Outstanding finance, write-offs, theft and plate changes aren't in MOT records. For a particular car, you need a history check.

Compare history checksWhat MOT history doesn't show

Other MG ZS years

MG ZS: every year, common faults and what to check

Other cars first used in 2020

Check a 2020 ZS you're looking at