Should I check the MOT history before buying a 2021 BMW 320i M Sport Auto?

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 BMW 320i M Sport Auto?

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 BMW 320i M Sport Auto?

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 BMW 320i M Sport Auto reliable?

Based on MOT data from 3,645 vehicles, the 2021 BMW 320i M Sport Auto has a first-time MOT pass rate of 92.9%, 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 BMW 320i M Sport Auto?

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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BMW 320i M Sport Auto (2021)

3,645 real MOT outcomes analysed • 92.9% first-time pass rate

2021 BMW 320i M Sport Auto

CarHunch analysed 3,645 real MOT records for the 2021 BMW 320i M Sport Auto. 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 MOT Averages Colour Breakdown Compare Models

The 2021 BMW 320i M Sport Auto is a strong performer in the MOT box, passing first time at 91.2%—well above the UK average of 80%—with only 9.4% of cars ever recording a dangerous defect, which is reassuringly low. Petrol examples make up the entire cohort and show the same robust 91.1% pass rate, so fuel type isn't a concern here.

At just over 29,000 miles median, these cars are still relatively young and lightly used, yet they're averaging only 0.23 failures per vehicle, suggesting the mechanicals are holding up well. The 1.2 advisories per car (mostly minor wear items) tell you to budget for some routine maintenance as they age, but if you're buying one, a pre-purchase inspection focusing on suspension and brake wear is your main priority.

The 2021 BMW 320i M Sport Auto passes its MOT first time more often than most UK vehicles (92.9% 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

92.9%

UK average ~80%

Better than average

Dangerous (ever)

9.4%

At least once in MOT history

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Avg failures / car

0.23

Over 2.3 tests on record

Low

Typical mileage

29k

Middle half: 21k–38k

For context

✅ Good baseline reliability. A 92.9% 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 3,645 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 3,645 BMW 320i M Sport Auto cars.

Before you buy a 2021 BMW 320i M Sport Auto

Based on MOT data from 3,645 vehicles — here's what to check.

📋 Check the full MOT history. 9.4% 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%)	3,586	92.8%	0.23
Other (2%)	58	96.3%	0.09

Colour Breakdown

Based on 18,713 BMW 320i M Sport Auto vehicles registered in the UK — across all years. From DVLA registration records.

Grey 35.9%

6,709

Black 22.8%

4,265

Blue 20.6%

3,864

White 18.4%

3,448

Red 1.6%

292

Orange 0.6%

109

Silver 0.1%

Mileage Distribution

Most 2021 BMW 320i M Sport Auto 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.

29,153

typical

21,404

low mileage

38,242

high mileage

Half of all 2021 BMW 320i M Sport Auto vehicles fall between 21,404 and 38,242 miles.

Is the mileage you're seeing normal?

✓ Under 21,404 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.

✓ 21,404–38,242 miles — normal for age. This is where most 2021 BMW 320i M Sport Autos sit.

⚠ Over 51,626 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

2.3

Avg MOT tests per vehicle

0.23

Avg failures per vehicle

1.2

Avg advisories per vehicle

Other model years — BMW 320i M Sport Auto: All 320i M Sport Auto years → Which year to buy? →

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