Is the 2018 MITSUBISHI ASX reliable?

Excellent reliability. Very few MOT failures. 91% of MITSUBISHI ASXs from 2018 passed their MOT first time in 2026, based on 3,708 tests. That's 9 points above the national average of 82%.

How much does a 2018 MITSUBISHI ASX cost to run?

Estimated annual running cost is £1,355 (£113/month), including £905 fuel, £195 road tax, £55 MOT, and £200 predicted repairs.

What is the MOT pass rate for a 2018 MITSUBISHI ASX?

The 2018 MITSUBISHI ASX has a 91% MOT pass rate based on 3,708 tests in 2026. This ranks 286 out of 649 cars from 2018.

Which year MITSUBISHI ASX is most reliable?

The 2020 MITSUBISHI ASX has the highest MOT pass rate at 94%. The least reliable year is 2010 at 74%.

MITSUBISHI ASX (2018)

Q: What is the average mileage for a 2018 MITSUBISHI ASX?

The average mileage for a 2018 MITSUBISHI ASX is 45,741 miles, which is below the expected 59,200 miles for a 8-year-old car. This suggests lighter use than average, which generally means less wear on major components.

Running costs, reliability data, and common problems from 3,708 real MOT tests.

Annual Cost

£1,355

£113/month

MOT Pass Rate

91%

Excellent

Road Tax

£195

Flat rate/year

Insurance

Grp 12-25

1560cc Diesel

Great Choice

91% pass rate, £1355/year to run. 9 points above average.

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Diesel1560cc8 years old3,708 tests46k miles avg

Annual Running Costs

Fuel (Diesel, 1560cc)

~55 mpg

£905

Road Tax

Flat rate (post-2017)

£195

MOT Test

£55

Predicted Repairs

Low estimate due to excellent reliability

£200

Total per year£1,355

Per month£113/mo

Per week£26/wk

Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT data. Insurance not included.

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Reliability Verdict

91% MOT pass rate(Excellent)

0%National avg: 82%100%

Excellent reliability. Very few MOT failures. That's 9 points above the national average of 82%. It also outperforms the MITSUBISHI brand average of 80%.

At 8 years old, 91% of MITSUBISHI ASXs from 2018 passed their MOT first time in 2026. That's based on 3,708 tests across the UK. The average mileage at this age is 45,741 miles.

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How Does It Compare?

Rank among 2018 cars286th of 649(top 44%)

Rank among MITSUBISHI models66th of 408(top 16%)

vs national average+9%(82% avg)

vs 2018 cars average+2%(89% avg)

vs MITSUBISHI average+11%(80% avg)

Mileage Analysis

45,741

Average miles

59,200

Expected for age

The average 2018 MITSUBISHI ASX has 45,741 miles on the clock, which is below the expected 59,200 miles for a 8-year-old car. This suggests lighter use than average, which generally means less wear on major components.

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Best Year to Buy?

The most reliable year is the 2020 model with a 94% MOT pass rate, while the 2010 model has the lowest at 74%. The 2018 sits between the two at 91%.

MITSUBISHI ASX by Year

Year	Pass Rate	Tests	Avg Mileage
2020	94%	247	31,938 mi
2019	92%	1,859	35,106 mi
2018	91%	3,708	45,741 mi
2017	88%	6,595	54,506 mi
2016	85%	5,479	63,408 mi
2015	83%	7,809	73,315 mi
2014	79%	6,761	83,266 mi
2013	81%	4,448	88,927 mi
2012	78%	3,865	99,698 mi
2011	77%	3,899	109,320 mi
2010	74%	2,955	115,701 mi

Similar Cars to Consider

VOLKSWAGEN GOLF

2017 · 1598cc Diesel

£1,350/year

91%

same

FORD FOCUS

2019 · 1499cc Diesel

£1,500/year

89%

-2%

MERCEDES A

2019 · 1461cc Diesel

£1,350/year

91%

same

MERCEDES A-CLASS

2017 · 1461cc Diesel

£1,500/year

88%

-3%

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About the 2018 MITSUBISHI ASX

The 2018 MITSUBISHI ASX is a small family car with a 1560cc diesel engine. 3,708 of these vehicles were MOT tested in 2026, making it a reasonably common sight on UK roads. Among all cars from 2018, the average MOT pass rate is 89%, and this model beats that benchmark.

With an average of 45,741 miles at 8 years old, MITSUBISHI ASX owners tend to use this car less than the typical driver.

2018 MITSUBISHI ASX Fuel Costs

The 1560cc diesel engine offers a reasonable balance between performance and economy. Expect around 55 mpg in mixed driving, which works out to roughly £905 per year at current diesel prices of 148p per litre (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 2018 MITSUBISHI ASX?

Total estimated annual running cost is £1,355 (£113/month), broken down as £905 fuel, £195 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.

MITSUBISHI ASX Reliability Trend

Newer MITSUBISHI ASXs show better MOT pass rates than older ones, with an average improvement of 11 percentage points.

Buying a Used 2018 MITSUBISHI ASX

At 8 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 2020 model has the highest pass rate at 94%.

Common Issues to Watch For

Based on the 2018 MITSUBISHI ASX's fuel type, age, and engine size, these are the most likely problem areas to check.

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.

Suspension Wear

Medium risk

Shock absorbers, springs, and anti-roll bar links typically need attention around this age. Listen for clunks over bumps and check for uneven tyre wear.

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 2018 MITSUBISHI ASX stacks up against similar cars for annual running costs, insurance, and tax.

Car	Pass Rate	Fuel/yr	Tax/yr	Insurance	Total/yr
MITSUBISHI ASX(2018)	91%	£905	£195	Grp 12-25	£1355
VOLKSWAGEN GOLF(2017)	91%	£905	£190	Grp 12-25	£1350-£5
FORD FOCUS(2019)	89%	£905	£190	Grp 12-25	£1500+£145
MERCEDES A(2019)	91%	£905	£190	Grp 12-25	£1350-£5
MERCEDES A-CLASS(2017)	88%	£905	£190	Grp 12-25	£1500+£145

Estimates based on 7,400 miles/year, current fuel prices, and MOT data. Insurance groups are indicative. Actual costs vary by driver, location, and usage.