MG 3 (2015)
Running costs, common problems, and reliability data based on 4,075 real MOT tests in 2024.
MOT Pass Rate
79%
Total Tests (2024)
4,075
Avg Mileage
53,548 mi
Est. Annual Cost
£1,827
Is the 2015 MG 3 reliable?
Average reliability. Expect some repairs as it ages. That's close to the national average of 82%. It falls below the MG brand average of 86%.
At 9 years old, 79% of MG 3s from 2015 passed their MOT first time in 2024. That's based on 4,075 tests across the UK. The average mileage at this age is 53,548 miles.
How does the 2015 MG 3 compare?
Mileage Analysis
The average 2015 MG 3 has 53,548 miles on the clock, which is in line with the expected 66,600 miles for a 9-year-old car, suggesting normal everyday use.
Best year to buy a MG 3?
The most reliable year is the 2021 model with a 92% MOT pass rate, while the 2014 model has the lowest at 79%. The 2015 sits between the two at 79%.
How much does a 2015 MG 3 cost to run?
Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT pass rate data. Insurance not included.
MG 3 by Year
Checking a specific MG 3?
Enter the reg plate to see its individual MOT history, mileage verification, and predicted costs.
About the 2015 MG 3
The 2015 MG 3 is a small family car with a 1498cc petrol engine. 4,075 of these vehicles were MOT tested in 2024, making it a reasonably common sight on UK roads. It sits in the bottom 82% of 2015 cars for MOT pass rates.
With an average of 53,548 miles at 9 years old, MG 3 owners drive about as much as the UK average.
2015 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 £1,137 per year at current petrol prices of 142p per litre (based on 7,400 miles per year).
What does it cost to own a 2015 MG 3?
Total estimated annual running cost is £1,827 (£152/month), broken down as £1137 fuel, £135 road tax, £55 MOT, and £500 predicted repairs. Repair costs are moderate, reflecting the 79% pass rate. Keeping on top of servicing will help avoid surprises.
MG 3 Reliability Trend
Newer MG 3s show better MOT pass rates than older ones, with an average improvement of 8 percentage points.
Buying a Used 2015 MG 3
At 9 years old, this is a solid used buy if you find one with good service history. Depreciation has levelled off, so you won't lose much more value. Focus on condition over mileage. If you're flexible on year, the 2021 model has the highest pass rate at 92%.
Alternatives to the 2015 MG 3
If reliability is your priority, there are 2 similar cars with a higher MOT pass rate. Here are comparable petrol cars with similar engines:
- FORD FIESTA (2015) 81% pass rate (+2%) from 225,575 tests
- VAUXHALL CORSA (2015) 78% pass rate (-1%) from 160,438 tests
- FORD FOCUS (2013) 78% pass rate (-1%) from 132,292 tests
- NISSAN QASHQAI (2017) 86% pass rate (+7%) from 100,176 tests