Pass rate
90.0%
Above average — 2.1 pts ahead of the 87.9% that cars this age and mileage manage.
Across 810 recorded tests.
Typical repair bill £37–£95
2018 Mercedes-Benz G-Class MOT pass rate
- 2018
- typical 39,352 mi
Most common fault
Tyres
28.5% of faults · 19.8% nationally
mostly tread below the limit, cuts and sidewall bulges.
Which year to buy
- Best 2020 96.2% pass
- Avoid 2015 83.5% pass
Across the 10 years on record, a spread of 12.7 points. See every year →
- First-attempt pass
- 89.1%
- Typical mileage
- 39k mi
The 2018 Mercedes-Benz G-Class MOT pass rate is 90.0% of its MOT tests — 2.1 points ahead of what its age and mileage predict. Tyres is the biggest single reason it fails, at 28.5% of what testers record.
Check your postcode
MOT pass rates are national — type your postcode to see how Mercedes-Benz G-Class does in your corner of the country.
Expert verdict
Tyres: 1.4× the national share
Tyres make up 28.5% of everything recorded on the 2018 Mercedes-Benz G-Class, against 19.8% nationally — 8.7 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.
- When it fails, it costs. Only 6% of this model’s typical repairs come in under £30 in parts — the failures here tend to be the kind that need a garage rather than a bulb.
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 Mercedes-Benz G-Class? Get an email when these numbers change .
How does the 2018 Mercedes-Benz G-Class compare?
Cars of this age and mileage average 87.9%, so this figure is 2.1 points ahead of what its age and mileage predict. On a first attempt, before any retests, the figure drops to 89.1%. The median 2018 Mercedes-Benz G-Class in this dataset had covered 39,352 mi.
67% of the tests on this vehicle ran on Petrol, which passed 91.5% of the time. Pass rates also shift with the test month: tests recorded October–March passed 89.8% of the time, April–September 90.3%.
The single most recorded failure item is "Has a cut in excess of the requirements deep enough to reach the ply or cords", noted on 1.98% of tests.
- 810 recorded tests behind this page.
- 90.0% overall pass rate, 89.1% on a first attempt.
- Across every year of the Mercedes-Benz G-Class, the average is 87.9% — best year 2020 (96.2%), worst 2015 (83.5%).
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
- 810
- Typical mileage (median)
- 39,352 mi
- Make and model
- Mercedes-Benz G-Class
- Updated
- 2026-11-05
Source: DVSA anonymised MOT test data (2023–2025), OGL v3.0.
Top part to budget for
Tyres
Usually a DIY or independent-garage job.
Does mileage affect the G-Class MOT pass rate?
Pass rate by odometer reading. Bar lengths start at 67% so small gaps stay visible.
Fuel type and reliability
Pass rate by fuel type. Petrol is the most common here (67% of tests).
Regional pass rates for the G-Class
| Region | Tests | Pass rate |
|---|---|---|
| South East | 236 | 88.6% |
| London | 98 | 95.9% |
| West Midlands | 87 | 90.8% |
| East of England | 83 | 89.2% |
| North West | 80 | 86.3% |
| South West | 65 | 84.6% |
| Yorkshire | 63 | 92.1% |
| Scotland | 37 | 86.5% |
| East Midlands | 29 | 93.1% |
| Wales | 21 | 100.0% |
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 G-Class
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 G-Class
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 windscreen 1.6% 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 the coil springs 1.0% of tests
“coil spring fractured or broken”
Look up inside each wheel arch with a torch, all the way round the spring. A snapped spring usually breaks at the very bottom coil, where a quick glance will not reach.
-
Check the suspension joints 0.9% of tests
“drag link end ball joint has excessive play”
With the car parked on level ground, rock the top of each front wheel in and out while someone watches the suspension arm. Clunks, or rubber boots split and greasy, are what testers record here.
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 G-Class through its MOT
Across the 10 items that are recorded most often on this model, the average repair comes to £37–£95 — and 6% of those repairs are parts that cost under £30.
- Average repair across the 10 common items
- £37–£95
- Cheapest common item: position lamp not working
- £5–£25
- Dearest common item: windscreen damaged
- £80–£200
- Common items a careful owner can do at home
- 70%
- Repairs that still cost under £30
- 6%
Estimates from typical UK parts prices, weighted by how often each item appears in 810 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 G-Class, side by side
10 model years on record, from 2011 to 2020. Across them the pass rate runs from 83.5% to 96.2% — a spread of 12.7 points. The bar under each year is the item that failed it most often.
- 2011 88.6% windscreen damaged but not…
- 2012 84.5% malfunction indicator lamp…
- 2013 89.8% coil spring fractured or broken
- 2014 86.6% coil spring fractured or broken
- 2015 83.5% windscreen damaged but not…
- 2016 88.1% coil spring fractured or broken
- 2017 87.3% windscreen damaged but not…
- 2018 90.0%has a cut in excess of the…
- 2019 90.9% windscreen damaged but not…
- 2020 96.2% door condition cannot be opened…
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 Mercedes-Benz G-Class 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
- Jaguar E-Pace 90.0%
- BMW 320 90.0%
- BMW X4 90.0%
- Kia Stinger 90.0%
- Toyota C-Hr 90.1%
- Land Rover Range Rover Evoque 89.9%
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 Mercedes-Benz G-Class 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 478 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 | 138 | 28.50% | 19.76% | +8.74 |
| Brakes | 72 | 14.90% | 20.89% | −5.99 |
| Non-component advisories | 53 | 11.00% | 4.18% | +6.82 |
| Lamps, reflectors and electrical equipment | 52 | 10.70% | 12.21% | −1.51 |
| Steering | 48 | 9.90% | 2.57% | +7.33 |
| Suspension | 43 | 8.90% | 20.98% | −12.08 |
| Visibility | 37 | 7.60% | 4.97% | +2.63 |
| Noise, emissions and leaks | 23 | 4.80% | 5.52% | −0.72 |
| Identification of the vehicle | 8 | 1.70% | 1.76% | −0.06 |
| Body, chassis, structure | 4 | 0.80% | 5.57% | −4.77 |
The exact failure items, in the tester's words
| Recorded item | Severity | Tests | Est. cost |
|---|---|---|---|
| Has a cut in excess of the requirements deep enough to reach the ply or cords Tyres | Major | 2.0% | £45–95 |
| Windscreen damaged but not adversely affecting driver's view Visibility | Minor | 1.6% | £80–200 |
| Coil spring fractured or broken Suspension | Major | 0.99% | £25–65 |
| Drag link end ball joint has excessive play Steering | Major | 0.86% | £18–45 |
| Headlamp aim too high Lamps, reflectors and electrical equipment | Major | 0.62% | £30–80 |
| Track rod end ball joint dust cover damaged or deteriorated, but preventing the ingress of dirt Steering | Minor | 0.62% | £18–45 |
| Window excessively tinted but not adversely affecting driver's view Visibility | Minor | 0.62% | £20–80 |
| Headlamp aim too low Lamps, reflectors and electrical equipment | Major | 0.49% | £30–80 |
| Position lamp not working Lamps, reflectors and electrical equipment | Major | 0.49% | £5–25 |
| Registration plates does not conform to the specified requirements Identification of the vehicle | Major | 0.49% | £20–80 |
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 |
|---|---|---|---|
| Tread depth below requirements of 1.6mm Tyres | Advisory | 6.8% | £45–95 |
| Brake pads less than 1.5 mm thick Brakes | Advisory | 4.1% | £18–45 |
| Has a tear, caused by separation or partial failure of its structure Tyres | Advisory | 2.7% | £45–95 |
| Brake discs in such a condition that it is seriously weakened Brakes | Advisory | 2.6% | £45–110 |
| Non-component advisories Nail in tyre Non-component advisories | Advisory | 2.5% | £45–95 |
| Non-component advisories Child Seat fitted not allowing full inspection of adult belt Non-component advisories | Advisory | 2.0% | £20–80 |
Pass rate by mileage
| Mileage | Tests | Pass rate | Median odometer |
|---|---|---|---|
| 0-30k | 233 | 94.8% | 20,933 mi |
| 30-60k | 441 | 89.1% | 42,871 mi |
| 60-90k | 117 | 83.8% | 70,471 mi |
| 90-120k | 15 | 93.3% | 101,406 mi |
| 120k+ | 4 | 75.0% | 165,355 mi |
Source: 810 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 G-Class MOT questions
What is the MOT pass rate for a 2018 Mercedes-Benz G-Class?
90.0% of the 810 2018 Mercedes-Benz G-Class tests in this dataset passed, against a national average of 87.9% for cars first used in 2018. First-attempt pass rate: 89.1%.
What are the most common MOT failures on a 2018 Mercedes-Benz G-Class?
The three most recorded items are has a cut in excess of the requirements deep enough to reach the ply or cords (1.98%), windscreen damaged but not adversely affecting driver's view (1.60%), coil spring fractured or broken (0.99%). Percentages are the share of tests on this vehicle that recorded the item.
Does mileage affect the 2018 Mercedes-Benz G-Class MOT pass rate?
Yes. Cars under 30,000 miles passed 94.8% of the time, falling to 75.0% for those over 120,000 miles. The median 2018 Mercedes-Benz G-Class in this dataset had covered 39,352 mi.
Which fuel type is most reliable for a 2018 Mercedes-Benz G-Class?
Petrol: 91.5% pass rate across 540 tests. Diesel: 87.0% pass rate across 270 tests. Shares are of the tests on this vehicle that recorded each fuel type.
Does the season affect the 2018 Mercedes-Benz G-Class MOT pass rate?
Tests recorded in the winter months (October–March) passed 89.8% of the time; summer months (April–September) passed 90.3%. Brakes, tyres and lights are tested harder in bad weather, but the difference is small on most models.