Pass rate
84.8%
Around average — 3.1 pts behind the 87.9% that cars this age and mileage manage.
Across 3,178 recorded tests.
Typical repair bill £26–£65
2018 MG Gs MOT pass rate
- 2018
- typical 41,750 mi
Check your postcode
Most common fault
Tyres
30.7% of faults · 19.8% nationally
mostly tread below the limit, cuts and sidewall bulges.
Part only £55–£85 for Tread depth below 1.6 mm. What fitting it takes →
Which year to buy
- Best 2018 84.8% pass · this year
- Avoid 2017 83.0% pass
Across the 4 years on record, a spread of 1.8 points. See every year →
- First-attempt pass
- 82.5%
- Typical mileage
- 42k mi
The 2018 MG Gs MOT pass rate is 84.8% of its MOT tests — 3.1 points behind what its age and mileage predict. Tyres is the biggest single reason it fails, at 30.7% of what testers record.
Expert verdict
Tyres: 1.6× the national share
Tyres make up 30.7% of everything recorded on the 2018 MG Gs, against 19.8% nationally — 10.9 points above. Check all four tyres yourself, including the inner shoulders, and look at the date stamp — a tyre can pass on tread and still be six years old.
- Falls short of its own age and mileage. Like-for-like, cars this age and mileage expect about 87.9%; this one manages 84.8% — 3.1 points below. Age is a fair excuse; this is not age.
Written from this page's own figures: fault shares against the national composition, the like-for-like pass rate, and the priced repair list. How these are worked out
Watching a MG Gs? Get an email when these numbers change .
How does the 2018 MG Gs compare?
Cars of this age and mileage average 87.9%, so this figure is 3.1 points behind what its age and mileage predict. On a first attempt, before any retests, the figure drops to 82.5%. The median 2018 MG Gs in this dataset had covered 41,750 mi.
Pass rates also shift with the test month: tests recorded October–March passed 85.0% of the time, April–September 84.7%.
The single most recorded failure item is "Anti-lock braking system warning lamp indicates an ABS fault", noted on 2.45% of tests.
- 3,178 recorded tests behind this page.
- 84.8% overall pass rate, 82.5% on a first attempt.
- Across every year of the MG Gs, the average is 83.9% — best year 2018 (84.8%), worst 2017 (83.0%).
Figures count every completed test on this vehicle-year in the dataset, including retests. See methodology for the exact definition.
This page's data
- Tests analysed
- 3,178
- Typical mileage (median)
- 41,750 mi
- Make and model
- MG Gs
- Updated
- 2026-11-07
Source: DVSA anonymised MOT test data (2023–2025), OGL v3.0.
Top part to budget for
Bulb
Usually a DIY or independent-garage job.
Does mileage affect the Gs MOT pass rate?
Pass rate by odometer reading. Bar lengths start at 52% so small gaps stay visible.
Where the MG Gs is most common
Across all Gs model years on record (2016–2019): 4,096 MG Gs cars tested in a recordable postcode area, across 9,518 tests. Cardiff (CF) has the most, with 316 cars tested there. Cars are counted by the postcode area of the MOT station, so this is where they were tested, not necessarily where their owners live.
| # | Postcode area | Cars | Pass rate |
|---|---|---|---|
| 1 | Cardiff (CF) | 316 | 78.4% |
| 2 | Swansea (SA) | 160 | 80.7% |
| 3 | Birmingham (B) | 119 | 87.3% |
| 4 | Peterborough (PE) | 112 | 83.9% |
| 5 | Maidstone (ME) | 99 | 86.1% |
| 6 | Dartford (DA) | 91 | 89.4% |
| 7 | Newport (NP) | 88 | 86.2% |
| 8 | Sheffield (S) | 72 | 88.8% |
| 9 | Hull (HU) | 70 | 90.3% |
| 10 | Bristol (BS) | 68 | 82.3% |
| 11 | Newcastle upon Tyne (NE) | 65 | 79.7% |
| 12 | Glasgow (G) | 62 | 80.4% |
| 13 | Gloucester (GL) | 58 | 86.9% |
| 14 | Derby (DE) | 58 | 84.0% |
| 15 | Nottingham (NG) | 55 | 82.1% |
| 16 | London (SE) | 55 | 85.0% |
| 17 | Portsmouth (PO) | 54 | 80.3% |
| 18 | Doncaster (DN) | 54 | 81.2% |
| 19 | Stoke On Trent (ST) | 53 | 86.7% |
| 20 | Chelmsford (CM) | 52 | 90.5% |
The twenty areas with the most MG Gs cars in the record, sorted by car count — sort the columns for a different question. Cars tested at a station whose postcode area could not be resolved are counted in the model's total but in no area, so the shares add up to slightly under 100% even across every area, and an area's cars are a subset of the model's. Pass rate is blank below 30 tests in an area, where a percentage is noise rather than a finding. How this model's pass rate varies by postcode →
Regional pass rates for the Gs
| Region | Tests | Pass rate |
|---|---|---|
| Wales | 654 | 80.3% |
| South East | 555 | 85.8% |
| East of England | 315 | 88.9% |
| South West | 307 | 85.0% |
| West Midlands | 288 | 86.1% |
| Yorkshire | 279 | 87.1% |
| North West | 208 | 86.1% |
| East Midlands | 193 | 86.0% |
| Scotland | 130 | 83.8% |
| London | 129 | 87.6% |
| North East | 120 | 79.2% |
Regions come from the postcode area recorded at the test station. Areas on region borders are assigned to the region with the majority of their population.
What fails a 2018 Gs
Everything a tester recorded on this vehicle, grouped into the inspection sections that produced it. The notch on each bar is the national share, so you can see at a glance whether this car is unusual or just ordinary.
A test can record several items, so these percentages do not add up to 100%. The exact strings, with prices, are in the full DVSA record at the bottom of this page.
Before your test
Three checks worth doing on a 2018 Gs
These are not generic tips — they are the faults recorded most often on this exact model, rewritten as things you can check yourself. All three take about ten minutes and cost nothing.
-
Check the lights 2.5% of tests
“anti-lock braking system warning lamp indicates an ABS fault”
Switch everything on and walk round the car: both headlamps on dip and main, every indicator, both brake lights, reverse, fog and the two number-plate lamps. A bulb is a few pounds and a five-minute job.
-
Check the windscreen 2.0% of tests
“windscreen damaged”
Check the driver’s side of the screen within the swept area for chips and cracks; anything larger than 10mm in the driver’s central view is a fail. Most chips can be resin-repaired for far less than a new screen.
-
Check tyre pressures and valves 1.9% of tests
“tyre pressure monitoring system malfunctioning or obviously inoperative”
Set the pressures to the figures on the door pillar, not the tyre wall, and check the valves do not hiss. A leaking valve is a two-minute fix that fails a test.
Shares are the proportion of tests on this vehicle that recorded the item, so they overlap: one test can record several.
What it costs to get a 2018 Gs through its MOT
Across the 10 items that are recorded most often on this model, the average repair comes to £26–£65 — and 41% of those repairs are parts that cost under £30.
- Average repair across the 10 common items
- £26–£65
- Cheapest common item: srs malfunction indicator lamp warning lamp…
- £3–£12
- Dearest common item: windscreen damaged
- £80–£200
- Common items a careful owner can do at home
- 70%
- Repairs that still cost under £30
- 41%
Estimates from typical UK parts prices, weighted by how often each item appears in 3,178 MOT tests on this vehicle. They exclude diagnostics, retest fees and garage labour where the part is a DIY fit, and they are not figures from the DVSA dataset. Older and higher-mileage examples cost more than the average. How these estimates are built → · All MOT repair costs → · Cheapest cars to put through a test →
Every year of the Gs, side by side
4 model years on record, from 2016 to 2019. Across them the pass rate runs from 83.0% to 84.8% — a spread of 1.8 points. The bar under each year is the item that failed it most often.
- 2016 83.7% registration plate lamp(s)…
- 2017 83.0% windscreen damaged but not…
- 2018 84.8%anti-lock braking system warning…
- 2019 84.0% anti-lock braking system warning…
Colour is the pass rate on a fixed scale, so a block means the same thing on any model. Each year links to its own page with the full fault breakdown.
Compare the 2018 MG Gs with another year
The raw pass rate mostly measures age. The year comparison adds the like-for-like figure, the mileage bands and the repair bill.
Other 2018 cars with a similar record
- Volvo V40 84.8%
- Renault Kadjar 84.8%
- Vauxhall Crossland 84.7%
- Peugeot 308 84.9%
- Citroen C4 84.6%
- BMW 640 85.0%
Closest pass rates among 2018 cars with at least 2,000 tests, so a small sample cannot flatter itself into the list. See the full rankings: best and worst MOT pass rates.
The full DVSA record for the 2018 MG Gs 10 failure items · 6 advisories · 10 inspection categories · mileage brackets · all of it in the page, none of it above the fold
Every inspection category
Shares of the 4,005 individual items recorded on this vehicle, and the same share across all cars nationally. A single test can record several items, so a row is not a percentage of tests.
| Category | Items | This car | Nationally | Difference |
|---|---|---|---|---|
| Tyres | 1,236 | 30.70% | 19.76% | +10.94 |
| Brakes | 1,181 | 29.30% | 20.89% | +8.41 |
| Lamps, reflectors and electrical equipment | 435 | 10.80% | 12.21% | −1.41 |
| Non-component advisories | 346 | 8.60% | 4.18% | +4.42 |
| Suspension | 267 | 6.60% | 20.98% | −14.38 |
| Visibility | 175 | 4.30% | 4.97% | −0.67 |
| Noise, emissions and leaks | 122 | 3.00% | 5.52% | −2.52 |
| Body, chassis, structure | 101 | 2.50% | 5.57% | −3.07 |
| Seat belts and supplementary restraint systems | 93 | 2.30% | 0.82% | +1.48 |
| Identification of the vehicle | 49 | 1.20% | 1.76% | −0.56 |
The exact failure items, in the tester's words
| Recorded item | Severity | Tests | Est. cost |
|---|---|---|---|
| Anti-lock braking system warning lamp indicates an ABS fault Brakes | Major | 2.5% | £3–15 |
| Headlamp aim too low Lamps, reflectors and electrical equipment | Rectified | 2.5% | £30–80 |
| Windscreen damaged but not adversely affecting driver's view Visibility | Minor | 2.0% | £80–200 |
| Tyre pressure monitoring system malfunctioning or obviously inoperative Tyres | Major | 1.9% | £45–95 |
| Srs malfunction indicator lamp warning lamp indicates a fault Seat belts and supplementary restraint systems | Major | 1.9% | £3–12 |
| Brake pads less than 1.5 mm thick Brakes | Major | 1.9% | £18–45 |
| Registration plate lamp(s) inoperative in the case of multiple lamps or light sources Lamps, reflectors and electrical equipment | Minor | 1.8% | £5–20 |
| Electronic stability control warning lamp indicates a fault Brakes | Major | 1.7% | £3–15 |
| Tread depth below requirements of 1.6mm Tyres | Major | 1.5% | £45–95 |
| Headlamp aim too low Lamps, reflectors and electrical equipment | Major | 1.4% | £30–80 |
Severity is as recorded: Major and Dangerous fail the test outright; Minor and Advisory do not. Costs are estimates from typical UK parts prices — see how they are built.
What testers noted without failing the car
Advisories are the early warnings — the same parts a year or two before they fail. Reading them is how you tell a car that has been maintained from one that has been patched.
| Recorded item | Severity | Tests | Est. cost |
|---|---|---|---|
| Has a tear, caused by separation or partial failure of its structure Tyres | Advisory | 18.8% | £45–95 |
| Brake discs in such a condition that it is seriously weakened Brakes | Advisory | 16.6% | £45–110 |
| Tread depth below requirements of 1.6mm Tyres | Advisory | 11.5% | £45–95 |
| Brake pads less than 1.5 mm thick Brakes | Advisory | 8.5% | £18–45 |
| Non-component advisories Child Seat fitted not allowing full inspection of adult belt Non-component advisories | Advisory | 4.4% | £20–80 |
| Coil spring corroded so that its cross sectional area is reduced and seriously weakened Suspension | Advisory | 3.7% | £25–65 |
Pass rate by mileage
| Mileage | Tests | Pass rate | Median odometer |
|---|---|---|---|
| 0-30k | 736 | 88.9% | 22,158 mi |
| 30-60k | 1,832 | 84.6% | 43,463 mi |
| 60-90k | 529 | 81.3% | 70,870 mi |
| 90-120k | 76 | 76.3% | 101,132 mi |
| 120k+ | 5 | 60.0% | 126,731 mi |
Source: 3,178 recorded tests on this vehicle-year. Every row above is recomputed from the same DVSA extract as the rest of the page — see the methodology.
2018 Gs MOT questions
What is the MOT pass rate for a 2018 MG Gs?
84.8% of the 3,178 2018 MG Gs tests in this dataset passed, against a national average of 87.9% for cars first used in 2018. First-attempt pass rate: 82.5%.
What are the most common MOT failures on a 2018 MG Gs?
The three most recorded items are anti-lock braking system warning lamp indicates an abs fault (2.45%), headlamp aim too low (2.45%), windscreen damaged but not adversely affecting driver's view (2.01%). Percentages are the share of tests on this vehicle that recorded the item.
Does mileage affect the 2018 MG Gs MOT pass rate?
Yes. Cars under 30,000 miles passed 88.9% of the time, falling to 60.0% for those over 120,000 miles. The median 2018 MG Gs in this dataset had covered 41,750 mi.
Does the season affect the 2018 MG Gs MOT pass rate?
Tests recorded in the winter months (October–March) passed 85.0% of the time; summer months (April–September) passed 84.7%. Brakes, tyres and lights are tested harder in bad weather, but the difference is small on most models.