MG 6 (2015)

Estimated running costs and MOT pass rates from 766 MOT tests in 2024.

Annual Cost

£2,227

£186/month

MOT Pass Rate

77%

Average

Road Tax

£275

Estimated/year

Est. Insurance

Grp 18-32

1900cc Diesel

Check Carefully

77% pass rate, £2,227/year to run. 5 points below average.

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Diesel1900cc11 years old766 tests74k miles avg

Annual Running Costs

Fuel (Diesel, 1900cc)

~48 mpg

£1,397

Road Tax

Estimated CO2 band

£275

MOT Test

£55

Predicted Repairs

£500

Total per year£2,227

Per month£186/mo

Per week£43/wk

Estimates based on 7,400 miles/year (UK average), diesel at 199.33p 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.

Reliability Verdict

77% MOT pass rate(Average)

0%All-model avg: 82%100%

Average reliability. Expect some repairs as it ages. That's close to the average of 82% across all models in our data. It falls below the MG brand average of 86%.

77% of MOT tests on MG 6s from 2015 ended in a pass in 2024, when they were about 9 years old. That's based on 766 tests across the UK, retests included. The average mileage recorded at those tests was 74,074 miles.

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How Does It Compare?

Rank among 2015 models457th of 515(bottom 12%)

Rank among MG models124th of 155(bottom 21%)

vs average of all models-5%(82% avg)

vs 2015 models average-6%(83% avg)

vs MG average-9%(86% avg)

Mileage Analysis

74,074

Average miles

66,600

Expected for age

The average 2015 MG 6 had 74,074 miles on the clock at its 2024 MOT, which is in line with the expected 66,600 miles for a 9-year-old car, suggesting normal everyday use.

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Best Year to Buy?

Of the years with at least 100 tests, the 2016 model has the highest MOT pass rate at 81%, while the 2011 model has the lowest at 71%. The 2015 scores 77%. Newer cars usually pass more often simply because they are younger, so compare years of a similar age.

MG 6 by Year

Year	Pass Rate	Tests	Avg Mileage
2016	81%	562	63,832 mi
2015	77%	766	74,074 mi
2014	73%	706	67,854 mi
2013	72%	400	77,109 mi
2012	71%	808	79,453 mi
2011	71%	284	76,841 mi

Similar Cars to Consider

Volkswagen Golf

2017 · 1598cc Diesel

£1,674/year

91%

+14%

Vauxhall Astra

2013 · 1700cc Diesel

£2,227/year

79%

+2%

Mercedes A-Class

2017 · 1461cc Diesel

£1,824/year

88%

+11%

Audi A3

2015 · 1598cc Diesel

£1,794/year

88%

+11%

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About the 2015 MG 6

The 2015 MG 6 is a family car. Our records list a 1900cc diesel engine, though engines vary between versions. 766 MOT tests were recorded on this model in 2024, making it a less common model in the UK market. It sits in the bottom 12% of 2015 models for MOT pass rate.

With an average of 74,074 miles recorded at its 2024 MOT tests, MG 6 owners drive about as much as the UK average.

2015 MG 6 Fuel Costs

The 1900cc diesel engine offers a reasonable balance between performance and economy. Expect around 48 mpg in mixed driving, which works out to roughly £1,397 per year with diesel at 199.33p per litre (GOV.UK weekly average, week of 19 October 2026; based on 7,400 miles per year). Diesel cars of this age should have their DPF (diesel particulate filter) checked, as replacements can be costly.

What does it cost to own a 2015 MG 6?

Total estimated annual running cost is £2,227 (£186/month), broken down as £1,397 fuel, £275 road tax, £55 MOT, and £500 predicted repairs. Repair costs are moderate, reflecting the 77% pass rate. Keeping on top of servicing will help avoid surprises.

MG 6 Reliability Trend

Newer MG 6s 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 2015 MG 6

At 11 years old, the MG 6 is firmly in budget territory. Purchase prices are low, but check for rust, worn suspension bushes, and electrical gremlins. A full service history is especially valuable at this age. If you're flexible on year, the 2016 model has the highest pass rate at 81%.

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.

DPF (Diesel Particulate Filter)

Watch out

Short journeys clog the DPF. Replacement costs £1,000-£2,500. Check the DPF warning light and ask about driving patterns.

Turbo Wear

Watch out

Diesel turbos work harder and wear faster. Listen for whining noises and check for oil leaks around the turbo housing.

AdBlue System

Medium risk

Post-2015 diesels use AdBlue for emissions. Sensor failures and tank heater issues are common. Budget £200-£500 for repairs.

EGR Valve

Watch out

Exhaust Gas Recirculation valves clog with carbon deposits, causing rough running and poor economy. Cleaning costs £150-£300, replacement £300-£600.

Rust and Corrosion

Watch out

At 10+ years, check wheel arches, sills, subframe, and brake lines for rust. Structural corrosion is an MOT failure. Prevention is far cheaper than repair.

Suspension Bushings

Watch out

Rubber suspension bushes harden and crack with age, causing knocking noises and vague handling. A full refresh costs £300-£800 depending on the car.

Service History

Low risk

Always 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 2015 MG 6 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 6(2015)	77%	£1,397	£275	Grp 18-32	£2,227
Volkswagen Golf(2017)	91%	£1,219	£200	Grp 12-25	£1,674-£553
Vauxhall Astra(2013)	79%	£1,397	£275	Grp 18-32	£2,227same
Mercedes A-Class(2017)	88%	£1,219	£200	Grp 12-25	£1,824-£403
Audi A3(2015)	88%	£1,219	£170	Grp 12-25	£1,794-£433

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 2015 MG 6

Is the 2015 MG 6 reliable?

Average reliability. Expect some repairs as it ages. 77% of MOT tests on 2015 MG 6s ended in a pass, from 766 tests (DVSA MOT data for tests in 2024, retests included). That's 5 points below the average of 82% across all models in the same data.

How much does a 2015 MG 6 cost to run?

Our estimate is £2,227 a year (£186 a month): £1,397 fuel, £275 road tax, £55 MOT and £500 predicted repairs, based on 7,400 miles a year. Insurance is not included.

What is the MOT pass rate for a 2015 MG 6?

77% of 766 MOT tests on the 2015 MG 6 ended in a pass (DVSA MOT data for tests in 2024, retests included). That ranks it 457th of 515 models first registered in 2015 (bottom 12%).

Which year MG 6 has the best MOT pass rate?

Of the years with at least 100 tests, the 2016 MG 6 has the highest MOT pass rate at 81% and the 2011 the lowest at 71%. Newer cars usually pass more often simply because they are younger and have done fewer miles.

What is the average mileage for a 2015 MG 6?

The average mileage recorded at MOT tests on the 2015 MG 6 is 74,074 miles, which is in line with the expected 66,600 miles for a 9-year-old car, suggesting normal everyday use.