Pass rate
95.2%
Above average — 7.3 pts ahead of the 87.9% that cars this age and mileage manage.
Across 6,482 recorded tests.
Typical repair bill £47–£119
2018 Porsche 911 MOT pass rate
- 2018
- typical 16,841 mi
Most common fault
Tyres
59.4% 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 2022 96.6% pass
- Avoid 2003 85.5% pass
Across the 23 years on record, a spread of 11.1 points. See every year →
- First-attempt pass
- 95.1%
- Typical mileage
- 17k mi
The 2018 Porsche 911 MOT pass rate is 95.2% of its MOT tests — 7.3 points ahead of what its age and mileage predict. Tyres is the biggest single reason it fails, at 59.4% of what testers record.
Check your postcode
MOT pass rates are national — type your postcode to see how Porsche 911 does in your corner of the country.
Expert verdict
Tyres: 3.0× the national share
Tyres make up 59.4% of everything recorded on the 2018 Porsche 911, against 19.8% nationally — 39.6 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.
- Beats its own age and mileage. Once you allow for how old and how far these cars have been driven, the expected pass rate is 87.9% and this one manages 95.2% — 7.3 points ahead of what its age and mileage predict.
- When it fails, it costs. Only 9% 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 Porsche 911? Get an email when these numbers change .
How does the 2018 Porsche 911 compare?
Cars of this age and mileage average 87.9%, so this figure is 7.3 points ahead of what its age and mileage predict. On a first attempt, before any retests, the figure drops to 95.1%. The median 2018 Porsche 911 in this dataset had covered 16,841 mi.
Pass rates also shift with the test month: tests recorded October–March passed 94.9% of the time, April–September 95.5%.
The single most recorded failure item is "Windscreen damaged but not adversely affecting driver's view", noted on 1.20% of tests.
- 6,482 recorded tests behind this page.
- 95.2% overall pass rate, 95.1% on a first attempt.
- Across every year of the Porsche 911, the average is 91.0% — best year 2022 (96.6%), worst 2003 (85.5%).
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
- 6,482
- Typical mileage (median)
- 16,841 mi
- Make and model
- Porsche 911
- Updated
- 2026-11-05
Source: DVSA anonymised MOT test data (2023–2025), OGL v3.0.
Top part to budget for
Windscreen
Typically a garage job — get quotes before committing.
Does mileage affect the 911 MOT pass rate?
Pass rate by odometer reading. Bar lengths start at 67% so small gaps stay visible.
Regional pass rates for the 911
| Region | Tests | Pass rate |
|---|---|---|
| South East | 1,715 | 95.9% |
| East of England | 895 | 95.6% |
| South West | 669 | 94.5% |
| North West | 581 | 94.7% |
| East Midlands | 528 | 95.1% |
| West Midlands | 507 | 96.1% |
| Yorkshire | 497 | 95.6% |
| London | 449 | 94.0% |
| Scotland | 326 | 93.9% |
| North East | 173 | 94.8% |
| Wales | 139 | 94.2% |
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 911
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 911
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 1.2% 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 number plates 0.4% of tests
“registration plates does not conform to the specified requirements”
Check both plates are present, legible and correctly spaced, with the postcode of the supplier and the BS AU 145e mark. A private plate in the wrong style is a fail before the car is even looked at.
-
Check the tyre tread 0.3% of tests
“tread depth below requirements of 1.6mm”
Check all four tyres cold, including the inner shoulder where wear hides — 1.6mm across the central three-quarters is the legal limit, and most testers fail at 1.6mm without argument.
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 911 through its MOT
Across the 10 items that are recorded most often on this model, the average repair comes to £47–£119 — and 9% of those repairs are parts that cost under £30.
- Average repair across the 10 common items
- £47–£119
- Cheapest common item: washers provides insufficient washer liquid
- £5–£15
- Dearest common item: catalyst emissions lambda reading after 2nd…
- £60–£250
- Common items a careful owner can do at home
- 70%
- Repairs that still cost under £30
- 9%
Estimates from typical UK parts prices, weighted by how often each item appears in 6,482 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 911, side by side
23 model years on record, from 2000 to 2022. Across them the pass rate runs from 85.5% to 96.6% — a spread of 11.1 points. The bar under each year is the item that failed it most often.
- 2000 85.5% registration plate lamp(s)…
- 2001 86.3% windscreen damaged but not…
- 2002 85.5% catalyst emissions lambda reading…
- 2003 85.5% windscreen damaged but not…
- 2004 87.2% registration plate lamp(s)…
- 2005 88.6% windscreen damaged but not…
- 2006 88.6% windscreen damaged but not…
- 2007 89.7% windscreen damaged but not…
- 2008 91.0% windscreen damaged but not…
- 2009 91.3% windscreen damaged but not…
- 2010 92.7% windscreen damaged but not…
- 2011 93.4% windscreen damaged but not…
- 2012 93.4% windscreen damaged but not…
- 2013 94.6% windscreen damaged but not…
- 2014 95.1% windscreen damaged but not…
- 2015 95.5% windscreen damaged but not…
- 2016 95.7% windscreen damaged but not…
- 2017 95.2% windscreen damaged but not…
- 2018 95.2%windscreen damaged but not…
- 2019 95.8% windscreen damaged but not…
- 2020 96.5% windscreen damaged but not…
- 2021 96.2% has a cut in excess of the…
- 2022 96.6% has a cut in excess of the…
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 Porsche 911 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
- Levc Tx Vista Comfort 95.5%
- Lexus Rx 95.9%
- Lexus Nx 93.9%
- Audi A8 93.9%
- Mazda Mx-5 93.7%
- Honda Jazz 93.4%
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 Porsche 911 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 1,737 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 | 1,034 | 59.40% | 19.76% | +39.64 |
| Brakes | 163 | 9.40% | 20.89% | −11.49 |
| Visibility | 136 | 7.80% | 4.97% | +2.83 |
| Non-component advisories | 130 | 7.50% | 4.18% | +3.32 |
| Lamps, reflectors and electrical equipment | 84 | 4.80% | 12.21% | −7.41 |
| Identification of the vehicle | 68 | 3.90% | 1.76% | +2.14 |
| Suspension | 55 | 3.20% | 20.98% | −17.78 |
| Noise, emissions and leaks | 51 | 2.90% | 5.52% | −2.62 |
| Body, chassis, structure | 12 | 0.70% | 5.57% | −4.87 |
| Seat belts and supplementary restraint systems | 4 | 0.20% | 0.82% | −0.62 |
The exact failure items, in the tester's words
| Recorded item | Severity | Tests | Est. cost |
|---|---|---|---|
| Windscreen damaged but not adversely affecting driver's view Visibility | Minor | 1.2% | £80–200 |
| Has a cut in excess of the requirements deep enough to reach the ply or cords Tyres | Major | 0.82% | £45–95 |
| Has ply or cords exposed Tyres | Major | 0.74% | £45–95 |
| Registration plates does not conform to the specified requirements Identification of the vehicle | Major | 0.40% | £20–80 |
| Tread depth below requirements of 1.6mm Tyres | Major | 0.35% | £45–95 |
| Headlamp aim too high Lamps, reflectors and electrical equipment | Rectified | 0.31% | £30–80 |
| Washers provides insufficient washer liquid Visibility | Major | 0.23% | £5–15 |
| Catalyst emissions Lambda reading after 2nd fast idle outside specified limits Noise, emissions and leaks | Major | 0.20% | £60–250 |
| Coil spring fractured or broken Suspension | Major | 0.19% | £25–65 |
| Headlamp cleaning device for LED or HID headlamp inoperative Lamps, reflectors and electrical equipment | Major | 0.17% | £5–25 |
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 | 7.3% | £45–95 |
| Has a tear, caused by separation or partial failure of its structure Tyres | Advisory | 3.9% | £45–95 |
| Non-component advisories Nail in tyre Non-component advisories | Advisory | 1.5% | £45–95 |
| Brake discs in such a condition that it is seriously weakened Brakes | Advisory | 1.2% | £45–110 |
| Tread depth tread pattern not visible over the whole tread area when minimum depth required is 1.0mm Tyres | Advisory | 1.2% | £45–95 |
| Has a cut in excess of the requirements deep enough to reach the ply or cords Tyres | Advisory | 0.88% | £45–95 |
Pass rate by mileage
| Mileage | Tests | Pass rate | Median odometer |
|---|---|---|---|
| 0-30k | 5,402 | 95.9% | 14,676 mi |
| 30-60k | 1,002 | 92.2% | 39,290 mi |
| 60-90k | 64 | 87.5% | 70,259 mi |
| 90-120k | 9 | 77.8% | 100,888 mi |
| 120k+ | 4 | 75.0% | 194,897 mi |
Source: 6,482 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 911 MOT questions
What is the MOT pass rate for a 2018 Porsche 911?
95.2% of the 6,482 2018 Porsche 911 tests in this dataset passed, against a national average of 87.9% for cars first used in 2018. First-attempt pass rate: 95.1%.
What are the most common MOT failures on a 2018 Porsche 911?
The three most recorded items are windscreen damaged but not adversely affecting driver's view (1.20%), has a cut in excess of the requirements deep enough to reach the ply or cords (0.82%), has ply or cords exposed (0.74%). Percentages are the share of tests on this vehicle that recorded the item.
Does mileage affect the 2018 Porsche 911 MOT pass rate?
Yes. Cars under 30,000 miles passed 95.9% of the time, falling to 75.0% for those over 120,000 miles. The median 2018 Porsche 911 in this dataset had covered 16,841 mi.
Does the season affect the 2018 Porsche 911 MOT pass rate?
Tests recorded in the winter months (October–March) passed 94.9% of the time; summer months (April–September) passed 95.5%. Brakes, tyres and lights are tested harder in bad weather, but the difference is small on most models.