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

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 T MHEV?

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 T MHEV?

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 T MHEV reliable?

Based on MOT data from 4,643 vehicles, the 2021 Ford Fiesta ST Line Edition T MHEV has a first-time MOT pass rate of 91.9%, 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 T MHEV?

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.

CarHunch

Get Started

Ford Fiesta ST Line Edition T MHEV (2021)

4,643 real MOT outcomes analysed • 91.9% first-time pass rate

2021 Ford Fiesta ST Line Edition T MHEV

CarHunch analysed 4,643 real MOT records for the 2021 Ford Fiesta ST Line Edition T MHEV. Real test outcomes — pass rates, defect profiles, mileage data — from verified DVLA records. Updated as new MOTs are recorded.
Which year to buy? →

On this page

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 Edition T MHEV is a reliably robust first-time MOT performer, with a 90.8% pass rate that sits well above the UK average of 80%, and only 7.1% of vehicles have ever recorded a dangerous defect—a reassuringly low figure. Petrol and alternative fuel versions perform almost identically, both clearing their tests at rates above 90%.

At 23,500 miles median age, these Fiestas are running relatively light for their age, suggesting careful ownership, and they're showing minimal structural trouble with just 0.26 failures per vehicle on average. The 1.3 advisories per car point to minor wear items rather than systemic faults, so when buying used, focus your inspection on routine maintenance history and brake fluid condition—this generation simply doesn't carry the hidden gremlins that plague older hot hatchbacks.

The 2021 Ford Fiesta ST Line Edition T MHEV passes its MOT first time more often than most UK vehicles (91.9% vs ~80% average) — and when it does fail, it's usually something minor and cheap to fix.

⚠️ Around 1 in 20 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

91.9%

UK average ~80%

Better than average

Dangerous (ever)

7.1%

At least once in MOT history

Check this vehicle

Avg failures / car

0.26

Over 2.4 tests on record

Low

Typical mileage

23k

Middle half: 17k–32k

For context

✅ Good baseline reliability. A 91.9% first-time pass rate puts this well above the UK average — it's a well-sorted vehicle in this age bracket.

🔍 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 4,643 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.

A solid choice — agree?

See this vehicle's full MOT history & AI hunches

Spot recurring advisories, hidden issues, and how it compares to 4,643 Ford Fiesta ST Line Edition T MHEV cars.

Before you buy a 2021 Ford Fiesta ST Line Edition T MHEV

Based on MOT data from 4,643 vehicles — here's what to check.

📋 Check the full MOT history. 7.1% 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 (97%)	4,507	91.8%	0.27
Other (2%)	114	97.4%	0.05

Colour Breakdown

Based on 12,261 Ford Fiesta ST Line Edition T MHEV vehicles registered in the UK — across all years. From DVLA registration records.

Blue 25.9%

3,171

Black 21.1%

2,588

Grey 19.7%

2,413

White 17.2%

2,113

Red 10.2%

1,256

Silver 5.9%

720

Mileage Distribution

Most 2021 Ford Fiesta ST Line Edition T MHEV 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.

23,493

typical

16,672

low mileage

31,640

high mileage

Half of all 2021 Ford Fiesta ST Line Edition T MHEV vehicles fall between 16,672 and 31,640 miles.

Is the mileage you're seeing normal?

✓ Under 16,672 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.

✓ 16,672–31,640 miles — normal for age. This is where most 2021 Ford Fiesta ST Line Edition T MHEVs sit.

⚠ Over 42,714 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 T MHEV — Still on the Road

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

Strong survival — 4,520 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

0.26

Avg failures per vehicle

1.3

Avg advisories per vehicle

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

2020 2022 2023 2024

Or browse all models: Ford →

Compare with another model

See how the 2021 Ford Fiesta ST Line Edition T MHEV stacks up against a rival.

A solid choice — agree?