Should I check the MOT history before buying a 2021 Mazda Cx 30?

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 Mazda Cx 30?

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 Mazda Cx 30?

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 Mazda Cx 30 reliable?

Based on MOT data from 1,853 vehicles, the 2021 Mazda Cx 30 has a first-time MOT pass rate of 94.8%, indicating generally reliable for its class. Always check the full MOT history of any specific vehicle before buying.

What are common problems with the 2021 Mazda Cx 30?

The most frequently recorded MOT issues on the 2021 Mazda Cx 30 are: Nearside Front Tyre worn close to legal limit/worn on edge (21.9% of vehicles), Front Brake pad(s) wearing thin (21.4% of vehicles), Offside Front Tyre worn close to legal limit/worn on edge (19.9% of vehicles). These figures are based on actual MOT test records — search a specific registration on CarHunch to see its individual history.

Do I need an HPI check when buying a 2021 Mazda Cx 30?

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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Mazda Cx 30 (2021)

1,853 real MOT outcomes analysed • 94.8% first-time pass rate

2021 Mazda Cx 30

CarHunch analysed 1,853 real MOT records for the 2021 Mazda Cx 30. Real test outcomes — pass rates, defect profiles, mileage data — from verified DVLA records. Updated as new MOTs are recorded.
Which year to buy? →

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AI Analysis Reliability Overview Common Issues Check a Specific Reg Buyer's Checklist Pass Rate by Fuel Mileage Distribution MOT Averages Colour Breakdown Compare Models

The 2021 Mazda CX-30 is a notably reliable proposition, with a 94.8% first-time pass rate that substantially outperforms the UK average of 80%—and only 4.4% of vehicles have ever recorded a dangerous defect, which is well below the concern threshold. It's essentially a petrol-only cohort here, so no fuel-type trade-offs to consider.

At just over 25,000 miles median for a three-year-old vehicle, these cars are running light, which explains why they're averaging only 0.16 failures per test and 2.0 advisories—typical wear items rather than systemic problems. If you're buying one, check the service history carefully despite the strong pass rates, as that low mileage means some may be poorly maintained despite light use.

The 2021 Mazda Cx 30 passes its MOT first time more often than most UK vehicles (94.8% vs ~80% average) — and when it does fail, it's usually something minor and cheap to fix.

First-time pass

94.8%

UK average ~80%

Better than average

Dangerous (ever)

4.4%

At least once in MOT history

Check this vehicle

Avg failures / car

0.16

Over 2.2 tests on record

Low

Typical mileage

25k

Middle half: 19k–33k

For context

✅ Good baseline reliability. A 94.8% 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.

These stats describe 1,853 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?

What tends to go wrong

Across 1,853 vehicles — figures show how many had each issue flagged at least once in their MOT history.

Tyre wear 21.9%

Nearside Front Tyre worn close to legal limit/worn on edge · Offside Front Tyre worn close to legal limit/worn on edge · Nearside Rear Tyre worn close to legal limit/worn on edge · …

Budget for a full set — on a vehicle this age, tyres are expected consumables. An inspection will confirm how much is left.

Brake wear 21.4%

Front Brake pad(s) wearing thin · Rear Brake disc worn, pitted or scored, but not seriously weakened · Offside Rear Brake disc worn, pitted or scored, but not seriously weakened · …

Ask the seller when brakes were last serviced. If they don't know, factor in the cost.

Suspension & steering 19.8%

Offside Rear Shock absorbers has light misting of oil · Nearside Rear Shock absorbers has light misting of oil

Harder to spot without a ramp — this is a good reason to book a pre-purchase inspection.

Other issues 6%

Nearside Rear Child Seat fitted not allowing full inspection of adult belt

Data covers a 3-year window centred on 2021.

See this vehicle's full MOT history & AI hunches

Spot recurring advisories, hidden issues, and how it compares to 1,853 Mazda Cx 30 cars.

Before you buy a 2021 Mazda Cx 30

Based on MOT data from 1,853 vehicles — here's what to check.

📋 Check the full MOT history. 4.4% 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 (100%)	1,846	94.8%	0.16

Colour Breakdown

Based on 4,389 Mazda Cx 30 vehicles registered in the UK — across all years. From DVLA registration records.

Grey 29.6%

1,300

Red 28%

1,229

Blue 15.4%

674

White 10.5%

461

Black 10.1%

443

Silver 6.4%

282

Mileage Distribution

Most 2021 Mazda Cx 30 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.

25,048

typical

18,715

low mileage

32,962

high mileage

Half of all 2021 Mazda Cx 30 vehicles fall between 18,715 and 32,962 miles.

Is the mileage you're seeing normal?

✓ Under 18,715 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.

✓ 18,715–32,962 miles — normal for age. This is where most 2021 Mazda Cx 30s sit.

⚠ Over 44,498 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

0.16

Avg failures per vehicle

Avg advisories per vehicle

Other model years — Mazda Cx 30: All Cx 30 years → Which year to buy? →

2020 2022

Or browse all models: Mazda →

Compare with another model

See how the 2021 Mazda Cx 30 stacks up against a rival.

A solid choice — agree?