Ford Fiesta ST-Line X Edition Turbo (2021)

Estimated running costs and MOT pass rates from 39 MOT tests in 2024.

Annual Cost

£1,630

£136/month

MOT Pass Rate

90%

Excellent

Road Tax

£200

Standard rate/year

Est. Insurance

Grp 1-8

999cc Petrol

Great Choice

90% pass rate, £1,630/year to run. 8 points above average.

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Petrol999cc5 years old39 tests34k miles avg

Annual Running Costs

Fuel (Petrol, 999cc)

~50 mpg

£1,175

Road Tax

Standard rate (from April 2017)

£200

MOT Test

£55

Predicted Repairs

Low estimate due to excellent reliability

£200

Total per year£1,630

Per month£136/mo

Per week£31/wk

Estimates based on 7,400 miles/year (UK average), petrol at 174.57p 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. Cars registered from April 2017 pay the £200 standard rate, plus £440 a year for five years (from the second year) if they cost over £40,000 new (over £50,000 for electric cars).

Reliability Verdict

90% MOT pass rate(Excellent)

0%All-model avg: 82%100%

Excellent reliability. Very few MOT failures. That's 8 points above the average of 82% across all models in our data. It also outperforms the Ford brand average of 85%.

90% of MOT tests on Ford Fiesta ST-Line X Edition Turbos from 2021 ended in a pass in 2024, when they were about 3 years old. That's based on 39 tests across the UK, retests included. The average mileage recorded at those tests was 34,152 miles.

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How Does It Compare?

Rank among 2021 models2613th of 3,336(bottom 22%)

Rank among Ford models467th of 1,136(top half)

vs average of all models+8%(82% avg)

vs 2021 models average-2%(92% avg)

vs Ford average+5%(85% avg)

Mileage Analysis

34,152

Average miles

22,200

Expected for age

The average 2021 Ford Fiesta ST-Line X Edition Turbo had 34,152 miles on the clock at its 2024 MOT, which is well above the expected 22,200 miles for a 3-year-old car. Check service history carefully, as high-mileage cars need consistent maintenance to stay reliable.

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Ford Fiesta ST-Line X Edition Turbo by Year

Year	Pass Rate	Tests	Avg Mileage
2021	90%	39	34,152 mi
2020	91%	3,564	29,634 mi
2019	91%	80	38,818 mi

Similar Cars to Consider

Ford Fiesta

2019 · 998cc Petrol

£1,630/year

91%

+1%

Volkswagen Golf

2019 · 1498cc Petrol

£1,853/year

92%

+2%

Vauxhall Corsa

2019 · 1398cc Petrol

£2,003/year

88%

-2%

MINI Cooper

2019 · 1499cc Petrol

£1,853/year

92%

+2%

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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. Our records list a 999cc petrol engine, though engines vary between versions. 39 MOT tests were recorded on this model in 2024, making it a rare model on UK roads. It sits in the bottom 22% of 2021 models for MOT pass rate.

With an average of 34,152 miles recorded at its 2024 MOT tests, Ford Fiesta ST-Line X Edition Turbo owners cover more miles than the average driver. High-mileage examples should be checked carefully for wear on suspension, brakes, and drivetrain components.

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 £1,175 per year with petrol at 174.57p per litre (GOV.UK weekly average, week of 19 October 2026; 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 £1,630 (£136/month), broken down as £1,175 fuel, £200 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. Note: with only 39 tests in our data, these figures should be treated as indicative rather than definitive.

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.

Coil Pack Failure

Medium risk

Smaller petrol engines are prone to ignition coil failures, causing misfires and rough running. Replacement is £50-£150 per coil.

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 2021 Ford Fiesta ST-Line X Edition Turbo 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
Ford Fiesta ST-Line X Edition Turbo(2021)	90%	£1,175	£200	Grp 1-8	£1,630
Ford Fiesta(2019)	91%	£1,175	£200	Grp 1-8	£1,630same
Volkswagen Golf(2019)	92%	£1,398	£200	Grp 12-25	£1,853+£223
Vauxhall Corsa(2019)	88%	£1,398	£200	Grp 8-20	£2,003+£373
MINI Cooper(2019)	92%	£1,398	£200	Grp 12-25	£1,853+£223

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 2021 Ford Fiesta ST-Line X Edition Turbo

Is the 2021 Ford Fiesta ST-Line X Edition Turbo reliable?

Excellent reliability. Very few MOT failures. 90% of MOT tests on 2021 Ford Fiesta ST-Line X Edition Turbos ended in a pass, from 39 tests (DVSA MOT data for tests in 2024, retests included). That's 8 points above the average of 82% across all models in the same data.

How much does a 2021 Ford Fiesta ST-Line X Edition Turbo cost to run?

Our estimate is £1,630 a year (£136 a month): £1,175 fuel, £200 road tax, £55 MOT and £200 predicted repairs, based on 7,400 miles a year. Insurance is not included.

What is the MOT pass rate for a 2021 Ford Fiesta ST-Line X Edition Turbo?

90% of 39 MOT tests on the 2021 Ford Fiesta ST-Line X Edition Turbo ended in a pass (DVSA MOT data for tests in 2024, retests included). That ranks it 2613th of 3,336 models first registered in 2021 (bottom 22%).

What is the average mileage for a 2021 Ford Fiesta ST-Line X Edition Turbo?

The average mileage recorded at MOT tests on the 2021 Ford Fiesta ST-Line X Edition Turbo is 34,152 miles, which is well above the expected 22,200 miles for a 3-year-old car. Check service history carefully, as high-mileage cars need consistent maintenance to stay reliable.