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Mg MG4

What 4,402 MOT tests in 2025 say about buying one used — and, just as important, what they cannot tell you.

Our verdict
Middle of the pack

Judged against every other electric car of the same age — at 3 years old — this one passes at 87.5% against 87.2% for the electric fleet. That is close enough to call it a wash. Neither the problem nor the answer: judge the individual car, not the badge. And whatever the MOT record says, it tells you nothing about the battery — no record does. Only a physical test measures that.

Based on 4,402 MOT tests · DVSA anonymised MOT test data, 2023–2025 · built 27 August 2026

At a glance

Pass rate, age for age
87.5%
electric fleet 87.2%
Raw pass rate, 2025
88.9%
all ages · 4,402 tests
Median mileage, newest year shown
31,250
2023 cars
Pass rate over three years
2023 98.9% → 2024 92.7% → 2025 88.9%
2023 → 2025
DVSA anonymised MOT test data, 2023–2025 · electric only UNVERIFIED — warranty table not yet built

Battery and warranty

Nothing here until it is sourced

Battery warranty terms per model year — years, mileage cap, capacity-retention threshold, and whether it transfers to a second owner — have to be traced to the manufacturer’s own published documentation, row by row, and dated. That table has not been built.

UNVERIFIED — blocks publication

What we will never do

We will not sell you a battery state-of-health figure we have not measured. Ours would be a guess, so we are not selling it. Where a physical test is worth its roughly £100, we will say so plainly.

What gets flagged

Advisory categoryItemsShare
Tyres1,66560.6%
Brakes50518.4%
Suspension28010.2%
Non-component advisories2258.2%
Identification of the vehicle331.2%
Road Wheels190.7%
DVSA anonymised MOT test data, 2023–2025 · the 6 most common categories, 2,727 items · 99.3% of all advisories

What actually fails

Advisories are warnings. These are the items that actually failed a test — the ones that cost money before the car can be driven away.

Failure categoryItemsShare
Tyres31543.3%
Lamps, reflectors and electrical equipment20928.7%
Visibility11616.0%
Suspension527.2%
Brakes121.7%
Seat belts and supplementary restraint systems101.4%
Body, chassis, structure81.1%
Steering30.4%
DVSA anonymised MOT test data, 2023–2025 · 727 failure items

Does it eat tyres?

You will read everywhere that electric cars destroy tyres — heavier, and all the torque at once. It is true of some and not others, and the only fair way to look is at cars of the same age.

At three to five years old, tyres are 58.8% of this model’s top advisory items. Petrol hatchbacks of the same age average 40.0%. So it is well above them.

Model, aged 3–5Tyres as a share of top advisories
MG4 electric 58.8%
Golf petrol51.4%
Fiesta petrol44.9%
Focus petrol43.7%
Astra petrol32.2%
Corsa petrol27.6%
DVSA anonymised MOT test data, 2023–2025 Age-matched comparison is ours

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