Should I check the MOT history before buying a 2018 MG Gs?

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 2018 MG Gs?

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 2018 MG Gs?

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.

How many 2018 MG Gs vehicles have had dangerous defects recorded?

20% of these vehicles have had a dangerous defect recorded. Search the registration on CarHunch — the full MOT history will show exactly what was flagged and whether it was resolved.

Is the 2018 MG Gs reliable?

Based on MOT data from 946 vehicles, the 2018 MG Gs has a first-time MOT pass rate of 85.9%, indicating generally reliable for its class. Always check the full MOT history of any specific vehicle before buying.

What are common problems with the 2018 MG Gs?

The most frequently recorded MOT issues on the 2018 MG Gs are: Offside Front Tyre worn close to legal limit/worn on edge (36% of vehicles), Nearside Front Tyre worn close to legal limit/worn on edge (35% of vehicles), Rear Brake disc worn, pitted or scored, but not seriously weakened (32.7% 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 2018 MG Gs?

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 Gs (2018)

946 real MOT outcomes analysed • 85.9% first-time pass rate

2018 MG Gs

CarHunch analysed 946 real MOT records for the 2018 MG Gs. 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 Mileage Distribution Still on the Road MOT Averages Colour Breakdown Compare Models

The 2018 MG GS passes its MOT first time at 85.9%, which is a solid 5.9 percentage points above the UK average—a genuine reliability strength for the model. However, one in five vehicles (20.2%) have recorded a dangerous defect at some point, so structural and safety issues do occur and warrant thorough inspection on any used purchase.

At 35,288 miles median, these cars are running below average for their age, suggesting relatively light use across the fleet. The average vehicle picks up 0.96 failures and 6.3 advisories per test, meaning minor wear-and-tear is common but serious problems are the exception—inspect suspension and braking components closely before buying, as these typically dominate the advisory list at this age.

The 2018 MG Gs passes its MOT first time at roughly the UK average rate (85.9%) — solid but worth checking this vehicle's history carefully.

⚠️ Over 1 in 5 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

85.9%

UK average ~80%

Around average

Dangerous (ever)

20.2%

At least once in MOT history

Check this vehicle

Avg failures / car

0.96

Over 6 tests on record

Moderate

Typical mileage

35k

Middle half: 26k–45k

For context

✅ Good baseline reliability. A 85.9% 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 6.3 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 946 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 946 vehicles — figures show how many had each issue flagged at least once in their MOT history.

Tyre wear 36%

Offside Front Tyre worn close to legal limit/worn on edge · Nearside Front Tyre worn close to legal limit/worn on edge · Nearside Rear Tyre slightly damaged/cracking or perishing · …

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

Brake wear 32.7%

Rear Brake disc worn, pitted or scored, but not seriously weakened · Offside Rear Brake disc worn, pitted or scored, but not seriously weakened · Nearside 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 14.9%

Nearside Rear Child Seat fitted not allowing full inspection of adult belt · COVID-19 6 MONTH EXTENSION

Lighting 10.8%

Nearside Headlamp aim too low · Offside Headlamp aim too low

Usually cheap to fix. Worth confirming all lights work before collecting.

Data covers a 3-year window centred on 2018.

See this vehicle's full MOT history & AI hunches

Spot recurring advisories, hidden issues, and how it compares to 946 MG Gs cars.

Before you buy a 2018 MG Gs

Based on MOT data from 946 vehicles — here's what to check.

📋 Check the full MOT history. 20.2% 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 2,808 MG Gs vehicles registered in the UK — across all years. From DVLA registration records.

White 29.4%

826

Black 29.2%

821

Silver 14.5%

406

Orange 10.4%

291

Brown 9.4%

263

Gold 7.2%

201

Mileage Distribution

Most 2018 MG Gs 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.

35,288

typical

26,252

low mileage

44,940

high mileage

Half of all 2018 MG Gs vehicles fall between 26,252 and 44,940 miles.

Is the mileage you're seeing normal?

✓ Under 26,252 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.

✓ 26,252–44,940 miles — normal for age. This is where most 2018 MG Gss sit.

⚠ Over 60,669 miles — higher than typical. Not necessarily a problem, but check service history and look out for advisory build-up on tyres and brakes.

2018 MG Gs — Still on the Road

Almost all 2018 MG Gss are still on the road.

Strong survival — 915 vehicles still getting MOTs in 2025, 99% of the peak.

Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2021–2025.

MOT History Averages

Avg MOT tests per vehicle

0.96

Avg failures per vehicle

6.3

Avg advisories per vehicle

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

2016 2017 2019

Or browse all models: MG →

Compare with another model

See how the 2018 MG Gs stacks up against a rival.

Average reliability — agree?