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

Based on MOT data from 2,009 vehicles, the 2021 Ford Focus ST Line Edition MHEV has a first-time MOT pass rate of 92.7%, 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 Focus ST Line Edition 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.

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Ford Focus ST Line Edition MHEV (2021)

2,009 real MOT outcomes analysed • 92.7% first-time pass rate

2021 Ford Focus ST Line Edition MHEV

CarHunch analysed 2,009 real MOT records for the 2021 Ford Focus ST Line Edition MHEV. 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 Focus ST-Line Edition mHEV is significantly more reliable than average, with a 91.5% first-time MOT pass rate well ahead of the UK's 80% benchmark. The dangerous defect rate of 10.7% is moderate and not a major concern for a buyer, though it warrants a thorough pre-purchase inspection.

At just under 30,000 miles on average, these vehicles are lightly used for their age, which helps explain the strong pass performance. The low failure rate of 0.23 per vehicle combined with moderate advisory issues (2.0 per vehicle) suggests this is a mechanically sound car—focus your inspection on the suspension and lighting systems where advisories typically cluster, but overall this is a solid used buy.

The 2021 Ford Focus ST Line Edition MHEV passes its MOT first time more often than most UK vehicles (92.7% 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

92.7%

UK average ~80%

Better than average

Dangerous (ever)

10.7%

At least once in MOT history

Check this vehicle

Avg failures / car

0.23

Over 2.3 tests on record

Low

Typical mileage

27k

Middle half: 20k–36k

For context

✅ Good baseline reliability. A 92.7% 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 2 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 2,009 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 2,009 Ford Focus ST Line Edition MHEV cars.

Before you buy a 2021 Ford Focus ST Line Edition MHEV

Based on MOT data from 2,009 vehicles — here's what to check.

📋 Check the full MOT history. 10.7% 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 (98%)	1,963	92.6%	0.24

Colour Breakdown

Based on 5,123 Ford Focus ST Line Edition MHEV vehicles registered in the UK — across all years. From DVLA registration records.

Blue 33.4%

1,710

Black 19.1%

977

Grey 17.2%

882

White 12.7%

649

Silver 9.3%

474

Red 8.4%

431

Mileage Distribution

Most 2021 Ford Focus ST Line Edition 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.

27,437

typical

20,347

low mileage

36,409

high mileage

Half of all 2021 Ford Focus ST Line Edition MHEV vehicles fall between 20,347 and 36,409 miles.

Is the mileage you're seeing normal?

✓ Under 20,347 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.

✓ 20,347–36,409 miles — normal for age. This is where most 2021 Ford Focus ST Line Edition MHEVs sit.

⚠ Over 49,152 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 Focus ST Line Edition MHEV — Still on the Road

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

Strong survival — 1,929 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

2.3

Avg MOT tests per vehicle

0.23

Avg failures per vehicle

Avg advisories per vehicle

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

2020 2022 2023

Or browse all models: Ford →

Compare with another model

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

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