Should I check the MOT history before buying a 2020 MG Zs?

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 2020 MG Zs?

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 2020 MG Zs?

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 2020 MG Zs reliable?

Based on MOT data from 4,203 vehicles, the 2020 MG Zs has a first-time MOT pass rate of 87.2%, indicating generally reliable for its class. Always check the full MOT history of any specific vehicle before buying.

What are common problems with the 2020 MG Zs?

The most frequently recorded MOT issues on the 2020 MG Zs are: Nearside Front Tyre worn close to legal limit/worn on edge (20.3% of vehicles), Offside Front Tyre worn close to legal limit/worn on edge (19.7% of vehicles), Rear Brake disc worn, pitted or scored, but not seriously weakened (15.2% 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 2020 MG Zs?

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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MG Zs (2020)

4,203 real MOT outcomes analysed • 87.2% first-time pass rate

2020 MG Zs

CarHunch analysed 4,203 real MOT records for the 2020 MG Zs. 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 Still on the Road MOT Averages Colour Breakdown Compare Models

The 2020 MG ZS passes its MOT first time in 87.2% of cases, which is comfortably above the UK average of 80%—a solid reliability signal for a Chinese-market car that's still relatively young. However, 16.8% of vehicles have experienced a dangerous defect at some point, which is notably high and worth taking seriously when inspecting any used example.

At an average mileage of 27,611 miles for a four-year-old car, these ZS models are running well within typical wear patterns, yet they're accumulating an average of 4.2 advisories per test, suggesting minor wear items need watching. Before buying, get a pre-purchase inspection focused on suspension, brakes, and electrical systems—the advisories suggest these areas need closer attention than the headline pass rate alone would indicate.

The 2020 MG Zs passes its MOT first time at roughly the UK average rate (87.2%) — solid but worth checking this vehicle's history carefully.

⚠️ Around 1 in 8 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

87.2%

UK average ~80%

Around average

Dangerous (ever)

16.8%

At least once in MOT history

Check this vehicle

Avg failures / car

0.59

Over 3.7 tests on record

Moderate

Typical mileage

26k

Middle half: 19k–35k

For context

✅ Good baseline reliability. A 87.2% 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 4.2 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 4,203 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.

Average reliability — agree?

What tends to go wrong

Across 4,203 vehicles — figures show how many had each issue flagged at least once in their MOT history.

Tyre wear 20.3%

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 15.2%

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

Other issues 7.4%

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

Data covers a 3-year window centred on 2020.

See this vehicle's full MOT history & AI hunches

Spot recurring advisories, hidden issues, and how it compares to 4,203 MG Zs cars.

Before you buy a 2020 MG Zs

Based on MOT data from 4,203 vehicles — here's what to check.

📋 Check the full MOT history. 16.8% 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%)	4,193	87.1%	0.59

Colour Breakdown

Based on 38,683 MG Zs vehicles registered in the UK — across all years. From DVLA registration records.

Blue 26.7%

10,339

Red 16.9%

6,551

Silver 13%

5,028

White 11.9%

4,615

Grey 11.6%

4,470

Black 10.4%

4,019

Green 5.1%

1,962

Orange 2.5%

951

Yellow 1.9%

737

Turquoise 0%

Purple 0%

Mileage Distribution

Most 2020 MG Zs 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.

25,969

typical

18,840

low mileage

34,578

high mileage

Half of all 2020 MG Zs vehicles fall between 18,840 and 34,578 miles.

Is the mileage you're seeing normal?

✓ Under 18,840 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.

✓ 18,840–34,578 miles — normal for age. This is where most 2020 MG Zss sit.

⚠ Over 46,680 miles — higher than typical. Not necessarily a problem, but check service history and look out for advisory build-up on tyres and brakes.

2020 MG Zs — Still on the Road

Almost all 2020 MG Zss are still on the road.

Strong survival — 4,105 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 2022–2025.

MOT History Averages

3.7

Avg MOT tests per vehicle

0.59

Avg failures per vehicle

4.2

Avg advisories per vehicle

Other model years — MG Zs: All Zs years → Which year to buy? →

2001 2002 2003 2004 2005 2006 2017 2018 2019

Or browse all models: MG →

Compare with another model

See how the 2020 MG Zs stacks up against a rival.

Average reliability — agree?