Should I check the MOT history before buying a 2021 BMW 330i 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 330i 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 330i 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 330i M Sport Auto reliable?

Based on MOT data from 760 vehicles, the 2021 BMW 330i M Sport Auto has a first-time MOT pass rate of 92.8%, 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 BMW 330i 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 330i M Sport Auto (2021)

760 real MOT outcomes analysed • 92.8% first-time pass rate

2021 BMW 330i M Sport Auto

CarHunch analysed 760 real MOT records for the 2021 BMW 330i 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 330i M Sport delivers well above average reliability, with a 91.4% first-time pass rate that sits 11 points ahead of the UK average—only 9.1% of vehicles have ever picked up a dangerous defect, which is reassuringly low. Petrol models achieve a 91.2% pass rate, indicating consistent performance across the cohort.

At 27,723 miles median mileage for three-year-old cars, these are genuinely low-mileage examples, which explains the minimal failure rate of 0.23 per vehicle and modest advisory count of 1.0. When you're shopping, prioritize full service history and check the brakes closely despite the strong data—that's where most advisories cluster on German sports saloons.

The 2021 BMW 330i M Sport Auto passes its MOT first time more often than most UK vehicles (92.8% 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

92.8%

UK average ~80%

Better than average

Dangerous (ever)

9.1%

At least once in MOT history

Check this vehicle

Avg failures / car

0.23

Over 2.3 tests on record

Low

Typical mileage

28k

Middle half: 21k–37k

For context

✅ Good baseline reliability. A 92.8% 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 760 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 760 BMW 330i M Sport Auto cars.

Before you buy a 2021 BMW 330i M Sport Auto

Based on MOT data from 760 vehicles — here's what to check.

📋 Check the full MOT history. 9.1% 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 (98%)	743	92.7%	0.23

Colour Breakdown

Based on 1,245 BMW 330i M Sport Auto vehicles registered in the UK — across all years. From DVLA registration records.

Grey 29.2%

363

Black 26.1%

325

Blue 22.2%

277

White 19.7%

245

Orange 1.8%

Red 0.5%

Silver 0.5%

Mileage Distribution

Most 2021 BMW 330i 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.

27,723

typical

20,803

low mileage

36,664

high mileage

Half of all 2021 BMW 330i M Sport Auto vehicles fall between 20,803 and 36,664 miles.

Is the mileage you're seeing normal?

✓ Under 20,803 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.

✓ 20,803–36,664 miles — normal for age. This is where most 2021 BMW 330i M Sport Autos sit.

⚠ Over 49,496 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

Avg advisories per vehicle

Other model years — BMW 330i M Sport Auto: All 330i M Sport Auto years → Which year to buy? →

2022

Or browse all models: BMW →

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See how the 2021 BMW 330i M Sport Auto stacks up against a rival.

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