MG 3 (2022)
Estimated running costs and MOT pass rates from 141 MOT tests in 2024.
Annual Cost
£1,853
£154/month
MOT Pass Rate
91%
Excellent
Road Tax
£200
Standard rate/year
Est. Insurance
Grp 12-25
1498cc Petrol
Great Choice
91% pass rate, £1,853/year to run. 9 points above average.
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Annual Running Costs
~42 mpg
Standard rate (from April 2017)
Low estimate due to excellent reliability
Estimates based on 7,400 miles/year (UK average), petrol at 174.57p a litre (GOV.UK weekly average, week of 19 October 2026), GOV.UK road tax rates and repair likelihood from MOT data. Insurance not included. Cars registered from April 2017 pay the £200 standard rate, plus £440 a year for five years (from the second year) if they cost over £40,000 new (over £50,000 for electric cars).
Reliability Verdict
Excellent reliability. Very few MOT failures. That's 9 points above the average of 82% across all models in our data. It also outperforms the MG brand average of 86%.
91% of MOT tests on MG 3s from 2022 ended in a pass in 2024, when they were about 2 years old. That's based on 141 tests across the UK, retests included. The average mileage recorded at those tests was 19,942 miles.
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How Does It Compare?
Mileage Analysis
19,942
Average miles
14,800
Expected for age
The average 2022 MG 3 had 19,942 miles on the clock at its 2024 MOT, which is above the expected 14,800 miles for a 2-year-old car. Higher-mileage cars often have more motorway miles, which is generally less harmful than stop-start urban driving.
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Best Year to Buy?
Of the years with at least 100 tests, the 2021 model has the highest MOT pass rate at 92%, while the 2014 model has the lowest at 79%. The 2022 scores 91%, but cars from 2022 weren't due their first routine MOT until 2025, so its figure isn't compared here. Newer cars usually pass more often simply because they are younger, so compare years of a similar age.
MG 3 by Year
Similar Cars to Consider
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About the 2022 MG 3
The 2022 MG 3 is a small family car. Our records list a 1498cc petrol engine, though engines vary between versions. 141 MOT tests were recorded on this model in 2024, making it a rare model on UK roads. It sits in the bottom 21% of 2022 models for MOT pass rate.
With an average of 19,942 miles recorded at its 2024 MOT tests, MG 3 owners cover more miles than the average driver.
2022 MG 3 Fuel Costs
The 1498cc petrol engine offers a reasonable balance between performance and economy. Expect around 42 mpg in mixed driving, which works out to roughly £1,398 per year with petrol at 174.57p per litre (GOV.UK weekly average, week of 19 October 2026; based on 7,400 miles per year).
What does it cost to own a 2022 MG 3?
Total estimated annual running cost is £1,853 (£154/month), broken down as £1,398 fuel, £200 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 91% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
MG 3 Reliability Trend
Newer MG 3s pass their MOT more often than older ones, by 6 percentage points on average, which is mostly down to age and wear.
Buying a Used 2022 MG 3
At 4 years old, the MG 3 offers good value with plenty of life remaining. Most manufacturer warranties will have expired, so a pre-purchase inspection is worth the cost. If you're flexible on year, the 2021 model has the highest pass rate at 92%.
Common Issues to Watch For
These are typical issues for cars of this age, fuel type and engine size, not faults recorded on this model's MOT tests. Use them as a checklist when you view one.
Service History
Low riskAlways request a full service history. Regular servicing is the single best indicator of how well a car has been maintained, regardless of mileage.
Running Costs Compared
How the 2022 MG 3 stacks up against similar cars for estimated annual running costs, insurance group, and tax.
| Car | Pass Rate | Fuel/yr | Tax/yr | Est. Ins. Group | Total/yr |
|---|---|---|---|---|---|
| MG 3(2022) | 91% | £1,398 | £200 | Grp 12-25 | £1,853 |
| Nissan Qashqai(2020) | 93% | £1,398 | £200 | Grp 12-25 | £1,853same |
| Mercedes A(2021) | 94% | £1,631 | £200 | Grp 18-32 | £2,086+£233 |
| MINI Cooper(2020) | 93% | £1,398 | £200 | Grp 12-25 | £1,853same |
| Ford Fiesta(2020) | 91% | £1,175 | £200 | Grp 1-8 | £1,630-£223 |
Estimates based on 7,400 miles/year, GOV.UK average pump prices for the week of 19 October 2026, GOV.UK road tax rates and MOT data. Insurance groups are our rough estimate from engine size, not official groups. Actual costs vary by driver, location, and usage.
Questions about the 2022 MG 3
Is the 2022 MG 3 reliable?
Excellent reliability. Very few MOT failures. 91% of MOT tests on 2022 MG 3s ended in a pass, from 141 tests (DVSA MOT data for tests in 2024, retests included). That's 9 points above the average of 82% across all models in the same data.
How much does a 2022 MG 3 cost to run?
Our estimate is £1,853 a year (£154 a month): £1,398 fuel, £200 road tax, £55 MOT and £200 predicted repairs, based on 7,400 miles a year. Insurance is not included.
What is the MOT pass rate for a 2022 MG 3?
91% of 141 MOT tests on the 2022 MG 3 ended in a pass (DVSA MOT data for tests in 2024, retests included). That ranks it 837th of 1,057 models first registered in 2022 (bottom 21%).
Which year MG 3 has the best MOT pass rate?
Of the years with at least 100 tests, the 2021 MG 3 has the highest MOT pass rate at 92% and the 2014 the lowest at 79%. Newer cars usually pass more often simply because they are younger and have done fewer miles.
What is the average mileage for a 2022 MG 3?
The average mileage recorded at MOT tests on the 2022 MG 3 is 19,942 miles, which is above the expected 14,800 miles for a 2-year-old car. Higher-mileage cars often have more motorway miles, which is generally less harmful than stop-start urban driving.
Related MG Models
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MINI Cooper
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