FIAT 500X (2018)
Running costs, reliability data, and common problems from 4,809 real MOT tests.
Annual Cost
£1,737
£145/month
MOT Pass Rate
87%
Good
Road Tax
£195
Flat rate/year
Insurance
Grp 12-25
1598cc Petrol
Solid Option
87% pass rate, £1737/year to run. 5 points above average.
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Annual Running Costs
~42 mpg
Flat rate (post-2017)
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
Good reliability. Occasional issues but generally solid. That's close to the national average of 82%. It also outperforms the FIAT brand average of 83%.
At 8 years old, 87% of FIAT 500Xs from 2018 passed their MOT first time in 2026. That's based on 4,809 tests across the UK. The average mileage at this age is 40,545 miles.
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How Does It Compare?
Mileage Analysis
40,545
Average miles
59,200
Expected for age
The average 2018 FIAT 500X has 40,545 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 92% MOT pass rate, while the 2015 model has the lowest at 80%. The 2018 sits between the two at 87%.
FIAT 500X by Year
Similar Cars to Consider
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About the 2018 FIAT 500X
The 2018 FIAT 500X is a small family car with a 1598cc petrol engine. 4,809 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 falls short of that benchmark.
With an average of 40,545 miles at 8 years old, FIAT 500X owners tend to use this car less than the typical driver.
2018 FIAT 500X Fuel Costs
The 1598cc 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 2018 FIAT 500X?
Total estimated annual running cost is £1,737 (£145/month), broken down as £1137 fuel, £195 road tax, £55 MOT, and £350 predicted repairs. Repair costs are moderate, reflecting the 87% pass rate. Keeping on top of servicing will help avoid surprises.
FIAT 500X Reliability Trend
Newer FIAT 500Xs show better MOT pass rates than older ones, with an average improvement of 8 percentage points.
Buying a Used 2018 FIAT 500X
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 92%.
Common Issues to Watch For
Based on the 2018 FIAT 500X's fuel type, age, and engine size, these are the most likely problem areas to check.
Suspension Wear
Medium riskShock 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 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 2018 FIAT 500X stacks up against similar cars for annual running costs, insurance, and tax.
| Car | Pass Rate | Fuel/yr | Tax/yr | Insurance | Total/yr |
|---|---|---|---|---|---|
| FIAT 500X(2018) | 87% | £1137 | £195 | Grp 12-25 | £1737 |
| VAUXHALL CORSA(2016) | 81% | £1137 | £30 | Grp 8-20 | £1572-£165 |
| FORD FOCUS(2016) | 87% | £1137 | £135 | Grp 12-25 | £1677-£60 |
| NISSAN QASHQAI(2017) | 86% | £955 | £190 | Grp 5-15 | £1550-£187 |
| VOLKSWAGEN POLO(2016) | 84% | £955 | £30 | Grp 5-15 | £1390-£347 |
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.
Related Fiat Models
Explore other Fiat cars or similar models in the same category.
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2009 · 1248cc Petrol
FIAT PUNTO
2007 · 1368cc Petrol
VAUXHALL CORSA
2016 · 1398cc Petrol
FORD FOCUS
2016 · 1596cc Petrol
NISSAN QASHQAI
2017 · 1200cc Petrol
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