Should I check the MOT history before buying a 2021 Seat Mii EV?

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 Seat Mii EV?

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 Seat Mii EV?

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 Seat Mii EV reliable?

Based on MOT data from 1,182 vehicles, the 2021 Seat Mii EV has a first-time MOT pass rate of 91.8%, 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 Seat Mii EV?

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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Seat Mii EV (2021)

1,182 real MOT outcomes analysed • 91.8% first-time pass rate

2021 Seat Mii EV

CarHunch analysed 1,182 real MOT records for the 2021 Seat Mii EV. 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 Mileage Distribution MOT Averages Colour Breakdown Compare Models

The 2021 SEAT Mii EV passes its MOT first time at 86.5%, which is comfortably above the UK average of 80%, and dangerous defects are rare at just 9.9%—a good sign of fundamental soundness. This is a genuinely reliable electric city car with minimal structural or safety issues to worry about.

At just under 20,000 miles median mileage, these vehicles are still very fresh, so expect low failure rates (0.25 per car) but don't assume that pattern will hold as they age beyond five years. The 1.1 advisories per vehicle are mostly wear items you'd address gradually, so when evaluating a used example, get a pre-purchase inspection to check the battery health and brake system condition—electric vehicles age differently than combustion cars.

The 2021 Seat Mii EV passes its MOT first time more often than most UK vehicles (91.8% 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

91.8%

UK average ~80%

Better than average

Dangerous (ever)

9.9%

At least once in MOT history

Check this vehicle

Avg failures / car

0.25

Over 2.2 tests on record

Low

Typical mileage

20k

Middle half: 14k–27k

For context

✅ Good baseline reliability. A 91.8% 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 1,182 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 1,182 Seat Mii EV cars.

Before you buy a 2021 Seat Mii EV

Based on MOT data from 1,182 vehicles — here's what to check.

📋 Check the full MOT history. 9.9% 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

Colour Breakdown

Based on 1,480 Seat Mii EV vehicles registered in the UK — across all years. From DVLA registration records.

Black 30.8%

456

White 28.3%

419

Blue 21.4%

317

Red 11.4%

169

Silver 8%

119

Mileage Distribution

Most 2021 Seat Mii EV 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.

19,732

typical

13,915

low mileage

26,518

high mileage

Half of all 2021 Seat Mii EV vehicles fall between 13,915 and 26,518 miles.

Is the mileage you're seeing normal?

✓ Under 13,915 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.

✓ 13,915–26,518 miles — normal for age. This is where most 2021 Seat Mii EVs sit.

⚠ Over 35,799 miles — higher than typical. Not necessarily a problem, but check service history and look out for advisory build-up on tyres and brakes.

MOT History Averages

2.2

Avg MOT tests per vehicle

0.25

Avg failures per vehicle

1.1

Avg advisories per vehicle

Other model years — Seat Mii EV: All Mii EV years → Which year to buy? →

2020

Or browse all models: Seat →

Compare with another model

See how the 2021 Seat Mii EV stacks up against a rival.

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