Should I check the MOT history before buying a 2021 Ford Fiesta ST Line Edition Turbo?

Yes. Look for recurring advisories — slow-building issues like corrosion or brake wear patterns show up years before they become failures. A full MOT history analysis will highlight patterns that a single test result won't reveal.

What corrosion should I look for when inspecting a 2021 Ford Fiesta ST Line Edition Turbo?

Check brake pipes, sills, subframes, and chassis legs. Surface rust is normal at this age; structural rust is a serious problem that is expensive to fix and can fail an MOT.

How are tyres and brakes typically on a 2021 Ford Fiesta ST Line Edition Turbo?

Tyres and brakes are the most common advisory items on vehicles of this age. Budget for replacement if they are near the limit, and factor this into your offer price.

Is the 2021 Ford Fiesta ST Line Edition Turbo reliable?

Based on MOT data from 4,157 vehicles, the 2021 Ford Fiesta ST Line Edition Turbo has a first-time MOT pass rate of 91%, indicating generally reliable for its class. Always check the full MOT history of any specific vehicle before buying.

Do I need an HPI check when buying a 2021 Ford Fiesta ST Line Edition Turbo?

Yes. The MOT history will not show outstanding finance, insurance write-offs, or stolen status. An HPI check covers these areas and should be part of any used car purchase.

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Ford Fiesta ST Line Edition Turbo (2021)

4,157 real MOT outcomes analysed • 91% first-time pass rate

2021 Ford Fiesta ST Line Edition Turbo

CarHunch analysed 4,157 real MOT records for the 2021 Ford Fiesta ST Line Edition Turbo. Real test outcomes — pass rates, defect profiles, mileage data — from verified DVLA records. Updated as new MOTs are recorded.
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AI Analysis Reliability Overview Check a Specific Reg Buyer's Checklist Pass Rate by Fuel Mileage Distribution Still on the Road MOT Averages Colour Breakdown Compare Models

The 2021 Ford Fiesta ST-Line Turbo is a reliably built car, with an 87.9% first-time pass rate that sits well above the UK average of 80%, and only 8.7% of vehicles ever developing a dangerous defect—a low concern threshold for buyers. The median mileage of just 24,214 miles is exactly what you'd expect for a three-year-old car, suggesting typical ownership patterns across the fleet.

With an average of only 0.29 failures per vehicle and 1.5 advisories, this Fiesta encounters minimal mechanical problems during its MOT years, indicating that mechanically it's straightforward and doesn't demand expensive early intervention. Before purchasing, check the specific service history and have a pre-buy inspection focus on the turbo system, as that's the most complex component that could become costly if neglected.

The 2021 Ford Fiesta ST Line Edition Turbo passes its MOT first time more often than most UK vehicles (91% vs ~80% average) — and when it does fail, it's usually something minor and cheap to fix.

⚠️ About 1 in 12 of these vehicles have had a dangerous MOT failure at some point — usually tyres or brakes, and often a one-off issue rather than a persistent problem. The group stats won't tell you which one you're looking at.

First-time pass

91%

UK average ~80%

Better than average

Dangerous (ever)

8.7%

At least once in MOT history

Check this vehicle

Avg failures / car

0.29

Over 2.4 tests on record

Low

Typical mileage

24k

Middle half: 17k–33k

For context

✅ Good baseline reliability. A 91% first-time pass rate puts this well above the UK average — it's a well-sorted vehicle in this age bracket.

🔧 Expect consumable spend. An average of 1.5 advisories per vehicle tells you wear items (tyres, brakes) get flagged regularly. Budget for them — they're not surprises.

🔍 The dangerous defect figure is real. Most are one-off tyre failures or brake issues — not structural problems. But it's exactly why checking the individual vehicle's history is essential, not optional.

These stats describe 4,157 vehicles as a group. The specific vehicle you're looking at could be the one good example or the one outlier. Run its registration to find out.

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See this vehicle's full MOT history & AI hunches

Spot recurring advisories, hidden issues, and how it compares to 4,157 Ford Fiesta ST Line Edition Turbo cars.

Before you buy a 2021 Ford Fiesta ST Line Edition Turbo

Based on MOT data from 4,157 vehicles — here's what to check.

📋 Check the full MOT history. 8.7% of these vehicles have had a dangerous defect recorded - recurring advisories often signal problems years before they become failures.
Search the reg on CarHunch for the full MOT history, reliability stats and a free AI-powered analysis of that exact vehicle.
🔍 Brake pipes, sills and subframes are the key areas on a vehicle this age — structural rust is hard to spot without getting underneath. A mechanic will check all of this before you commit, and give you a concrete basis to negotiate on price. Inspection →
📄 Outstanding finance, insurance write-offs and clocking won't appear in the MOT records — a dedicated history check covers all of this. Our link gets you 20% off automatically. History Get 20% off via CarHunch

Pass Rate by Fuel Type

Fuel type	Vehicles	Pass rate	Avg failures
Petrol (99%)	4,115	90.9%	0.29

Colour Breakdown

Based on 11,023 Ford Fiesta ST Line Edition Turbo vehicles registered in the UK — across all years. From DVLA registration records.

Blue 30.1%

3,318

Grey 18.1%

1,997

Black 18.1%

1,995

White 16.6%

1,835

Red 11.2%

1,234

Silver 5.8%

644

Mileage Distribution

Most 2021 Ford Fiesta ST Line Edition Turbo vehicles sit in the blue band. If the vehicle you're looking at is outside it, it's either unusually low or high mileage for its age.

24,214

typical

17,104

low mileage

33,001

high mileage

Half of all 2021 Ford Fiesta ST Line Edition Turbo vehicles fall between 17,104 and 33,001 miles.

Is the mileage you're seeing normal?

✓ Under 17,104 miles — lower than most. Could be great, or could be a vehicle that rarely moved. Check test frequency and mileage progression in the MOT history.

✓ 17,104–33,001 miles — normal for age. This is where most 2021 Ford Fiesta ST Line Edition Turbos sit.

⚠ Over 44,551 miles — higher than typical. Not necessarily a problem, but check service history and look out for advisory build-up on tyres and brakes.

2021 Ford Fiesta ST Line Edition Turbo — Still on the Road

Almost all 2021 Ford Fiesta ST Line Edition Turbos are still on the road.

Strong survival — 3,953 vehicles still getting MOTs in 2025, 100% of the peak.

Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2023–2025.

MOT History Averages

2.4

Avg MOT tests per vehicle

0.29

Avg failures per vehicle

1.5

Avg advisories per vehicle

Other model years — Ford Fiesta ST Line Edition Turbo: All Fiesta ST Line Edition Turbo years → Which year to buy? →

2019 2020

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