FORD FIESTA ST-LINE X EDITION TURBO (2021)
Running costs, reliability data, and common problems from 39 real MOT tests.
Annual Cost
£1,405
£117/month
MOT Pass Rate
90%
Excellent
Road Tax
£195
Flat rate/year
Insurance
Grp 1-8
999cc Petrol
Great Choice
90% pass rate, £1405/year to run. 8 points above average.
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Annual Running Costs
~50 mpg
Flat rate (post-2017)
Low estimate due to excellent reliability
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
Excellent reliability. Very few MOT failures. That's 8 points above the national average of 82%. It also outperforms the FORD brand average of 85%.
At 5 years old, 90% of FORD FIESTA ST-LINE X EDITION TURBOs from 2021 passed their MOT first time in 2026. That's based on 39 tests across the UK. The average mileage at this age is 34,152 miles.
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How Does It Compare?
Mileage Analysis
34,152
Average miles
37,000
Expected for age
The average 2021 FORD FIESTA ST-LINE X EDITION TURBO has 34,152 miles on the clock, which is in line with the expected 37,000 miles for a 5-year-old car, suggesting normal everyday use.
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Best Year to Buy?
The most reliable year is the 2020 model with a 91% MOT pass rate, while the 2019 model has the lowest at 91%. The 2021 sits between the two at 90%.
FORD FIESTA ST-LINE X EDITION TURBO by Year
Similar Cars to Consider
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About the 2021 FORD FIESTA ST-LINE X EDITION TURBO
The 2021 FORD FIESTA ST-LINE X EDITION TURBO is a city car with a 999cc petrol engine. 39 of these vehicles were MOT tested in 2026, making it a rare model on UK roads. It sits in the bottom 78% of 2021 cars for MOT pass rates.
With an average of 34,152 miles at 5 years old, FORD FIESTA ST-LINE X EDITION TURBO owners drive about as much as the UK average.
2021 FORD FIESTA ST-LINE X EDITION TURBO Fuel Costs
The modest 999cc petrol engine keeps fuel costs low, which is a real advantage for a city car. Expect around 50 mpg in mixed driving, which works out to roughly £955 per year at current petrol prices of 142p per litre (based on 7,400 miles per year).
What does it cost to own a 2021 FORD FIESTA ST-LINE X EDITION TURBO?
Total estimated annual running cost is £1,405 (£117/month), broken down as £955 fuel, £195 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 90% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
Buying a Used 2021 FORD FIESTA ST-LINE X EDITION TURBO
At 5 years old, the FORD FIESTA ST-LINE X EDITION TURBO 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 2020 model has the highest pass rate at 91%. Note: with only 39 tests in our data, these figures should be treated as indicative rather than definitive.
Common Issues to Watch For
Based on the 2021 FORD FIESTA ST-LINE X EDITION TURBO's fuel type, age, and engine size, these are the most likely problem areas to check.
Coil Pack Failure
Medium riskSmaller petrol engines are prone to ignition coil failures, causing misfires and rough running. Replacement is £50-£150 per coil.
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 2021 FORD FIESTA ST-LINE X EDITION TURBO stacks up against similar cars for annual running costs, insurance, and tax.
| Car | Pass Rate | Fuel/yr | Tax/yr | Insurance | Total/yr |
|---|---|---|---|---|---|
| FORD FIESTA ST-LINE X EDITION TURBO(2021) | 90% | £955 | £195 | Grp 1-8 | £1405 |
| FORD FIESTA(2019) | 91% | £955 | £190 | Grp 1-8 | £1400-£5 |
| VOLKSWAGEN GOLF(2019) | 92% | £1137 | £190 | Grp 12-25 | £1582+£177 |
| VAUXHALL CORSA(2019) | 88% | £1137 | £190 | Grp 8-20 | £1732+£327 |
| MINI COOPER(2019) | 92% | £1137 | £190 | Grp 12-25 | £1582+£177 |
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 Ford Models
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