75.1%
MG3 pass rate
Used MG3 buying guide
In 2025, MG3 cars passed 75.1% of 24,993 initial MOT tests, 2.8 points above the 72.3% UK average. Here is where it fails and what to check before you buy.
Looking at a specific MG3? Check its finance, write-off, stolen, mileage and keeper history. £15, no account needed.
MG3 MOT record in brief
Initial MOT tests in 2025, retests excluded.
72.3%
UK average, all cars
+2.8
percentage points above average
Ranked on pass rate the MG3 sits 264th of 575 models in the data. MG as a brand averaged 80.9%, so this model runs 5.8 points behind its own brand. MG3 cars aged 3 to 5 years passed 80.1% of MOT tests in 2025; for examples aged 11 years and over that fell to 62.9%.
A pass rate is not a reliability score. The full MG3 MOT record has the pass rate by age, every common failure and how the MG3 compares with similar cars.
MG3 fuel types
Petrol was the most common fuel among MG3 cars tested in 2025. None of the tested examples were diesel.
Where the MG3 fails its MOT
Where MG3 cars that failed their 2025 MOT were marked down, as a share of all recorded failure items.
The specific items testers recorded most often were wipers does not clear the windscreen effectively (7.2%), headlamp aim too low (6.4%) and tread depth below requirements of 1.6mm (5.1%). See every common MG3 MOT failure.
These are DVSA failure records across every MG3 that failed, not a claim that every MG3 has these problems.
What should you check when buying a used MG3?
The areas above, most common first, and what an MOT tester looks at in each.
1
Lamps, reflectors and electrical equipment
Walk round with every light on: headlights, brake lights, indicators, fog lights and the number plate lamp. Check no warning lights stay on after starting. 24.8% of MG3 failure items.
2
Tyres
Check tread depth across the full width of every tyre (the legal minimum is 1.6mm), and look for cuts, bulges and uneven wear. 19.1% of MG3 failure items.
3
Brakes
Make sure the pedal feels firm, the car stops in a straight line, the handbrake holds on a slope and no brake warning light is showing. 19.1% of MG3 failure items.
4
Suspension
Listen for knocks over bumps, check the car sits level, and look for leaking shock absorbers and split rubber gaiters. 12.9% of MG3 failure items.
5
Visibility
Check the windscreen for chips or cracks in the driver's view, and that the wipers and washers clear it properly. 12.6% of MG3 failure items.
None of this replaces the car's own record. Run a free MOT history check on the registration to see every test, advisory and recorded mileage for that car.
What the MOT record doesn't tell you
Knowing MG3 failures cluster around lamps, reflectors and electrical equipment and tyres tells you what to inspect. It tells you nothing about whether the car is safe to buy. An MOT does not show money still owed on the car, a write-off, a theft record or a clocked odometer.
Check the exact MG3 you are looking at. One £15 report, instant results, backed by a £30,000 data guarantee. More on the MG history check.
- Outstanding finance
- Write-off records
- Stolen markers
- Mileage history
- Previous keepers
Other used MG models
The most-tested MG models in 2025, with how their MOT pass rate compares with the MG3.
Used MG3 FAQs
Is the MG3 reliable?
MOT data does not measure reliability. It records whether a car met the roadworthiness standard on the day of its test. What it does show is a 75.1% first-time pass rate for the MG3 across 24,993 tests in 2025, above the 72.3% average for all cars.
Do older MG3 cars fail their MOT more often?
MG3 cars aged 3 to 5 years passed 80.1% of MOT tests in 2025; for examples aged 11 years and over that fell to 62.9%. On an older example, the car's own MOT history tells you more than the model average.
What should I check before buying a used MG3?
On the car itself, start with the areas it most often fails on: lamps, reflectors and electrical equipment, tyres and brakes. Then check the individual car's history: outstanding finance, insurance write-off records, stolen markers, mileage and previous keepers. None of these appear in the MOT record or on the V5C.
How do I check a MG3's history?
Enter the registration of the specific car. A Carpeep car history check reports outstanding finance, write-off category, stolen markers, mileage history, previous keepers, MOT and tax status, import and export markers and scrapped status in one £15 report.
MOT figures are aggregated from the DVSA MOT Anonymised data set for 2025 (class 4 initial tests, retests excluded), licensed under the Open Government Licence v3.0. MOT results describe roadworthiness at test, not mechanical reliability.