Seat Leon — MOT statistics 2024

The Seat Leon failed 21.49% of 296,118 first MOT attempts in 2024 ("first-time", excluding retests). Adjusted for the age of the fleet, its initial-failure ratio is 92 (100 = expected for its age profile). This car fails its MOT about 8% less often than expected for its age.

Age-adjusted peer: Audi A1 (index 91.3) — the two published results are 0.7 index points apart.

Seat Leon common problems: what actually fails the MOT

Lamps, reflectors and electrical equipment stand out at 14.2 per 100 tests, against 23.5 per 100 tests nationally.

higher bar = fails more oftenrate per 100 tests

family vs national — top component groups, per 100 tests. Legend: This family · National avg.

Named defects ranked by how much more often they appear than the national average — not by raw rate.

Seat Leon MOT advisories: what gets flagged

Tyres are highest at 77.5 per 100 tests; Body & structure are lowest at 5.9 per 100 tests — the gap is 71.6 per 100 tests.

higher bar = flagged more oftenadvisory items per 100 initial tests

Advisories are wear the tester noted but didn't fail — what will need money soon.

How does the Seat Leon perform as it gets older?

At age 10 stands out at 21.0%, against 27.7% for all cars of the same age.

higher = larger sharecompare shares in percentage points

Chart axes: car age, years · failure-rate scale 0–46%.

Takeaway: a 10-year-old Leon has roughly a 21% chance of failing its MOT; from about age 4 it stays above the national age curve.

Seat Leon petrol vs diesel: which ages best

Diesel is highest at 26.5%; Hybrid is lowest at 11.3% — the gap is 15.3 percentage points.

higher = larger sharecompare shares in percentage points

Chart sample sizes: n=172k · n=117k · n=4,801 · n=2,941.

How dangerous are Seat Leon MOT failures?

Major defects stand out at 41.4 per 100 tests, against 63.3 per 100 tests nationally.

higher bar = fails more oftenrate per 100 tests

Chart values: Minor 25.4 · Major 41.4 · Dangerous 12.5.

Per 100 tests on this family. National average: Minor 24.4 · Major 63.3 · Dangerous 12.9 per 100.

Does the month of a Seat Leon MOT matter?

Nov is highest at 23.0%; May is lowest at 20.3% — the gap is 2.8 percentage points.

higher = larger sharecompare shares in percentage points

Chart scale: 19%–29%.

bars: Seat Leon · dashed: all class-4 cars

Takeaway: the spread between best and worst month is 2.8 percentage points — booking month barely matters for this family. Seasonality partly reflects registration-date clustering, not weather.

Before reading the shape: most of it is not about cars. Britain changes its registration plates twice a year, and 19.5% of these cars were first registered in March with another17% in September — 37% in two months against the 17% an even spread would give. An MOT falls due three years after first registration, so the buying calendar becomes the testing calendar. Peaks here mark when cars are tested, not when they are worse.

Seat Leon average mileage by age

At age 8, the middle half of Leons runs from 53,414 miles to 86,192 miles, against 68,239 miles as the median.

further right = more milesmedian is the typical car; band is p25–p75

Chart axes: car age, years · odometer scale 0–167k mi.

Does high mileage mean more Seat Leon MOT failures?

Same age band (6–14 years), split by odometer — this separates wear from age: 11.4% of the lowest-mileage cars failed versus 35.4% of the highest.

line: median · band: middle half of the fleet (p25–p75)

A typical 8-year-old Leon has ~68,239 miles on the clock. Much more — ask why; much less — check for gaps in the MOT history.

Where in Britain the Seat Leon fails its MOT most

Exeter area is highest at 32.6%; Durham area is lowest at 17.3% — the gap is 15.2 percentage points.

higher = larger sharecompare shares in percentage points

Toughest areas	% failing	vs model overall
Exeter (EX)	32.55%	+11.1 pp
Plymouth (PL)	30.18%	+8.7 pp
Brighton (BN)	29.96%	+8.5 pp
Portsmouth (PO)	26.7%	+5.2 pp
Bristol (BS)	26.17%	+4.7 pp

Easiest areas	% failing	vs model overall
Durham (DH)	17.32%	-4.2 pp
Stevenage (SG)	17.61%	-3.9 pp
Chelmsford (CM)	17.91%	-3.6 pp
Liverpool (L)	17.92%	-3.6 pp
Bolton (BL)	18.11%	-3.4 pp

Why do areas differ?

For each external factor we correlate the area fail rate with the factor across postcode areas that have ≥800 tests of this family, then compare the bottom vs top fifth (quintile) of the factor. Correlation, not causation — factors travel together (the north is colder and often poorer; urban areas are denser and less salted). Road surface condition is joined now, for the 91 English areas the DfT publishes, and it explains nothing: the correlation with suspension failures is −0.01 and with body and structure failures 0.07. Potholes wreck wheels and tyres between tests, but by the time a car reaches the bay the road it drives on leaves no measurable trace.

In areas with the highest mot centre density this model fails 4.3 pp more often than in the lowest fifth (r=0.41, n=100 areas with ≥800 tests).

In areas with the highest urban share this model fails 4.1 pp less often than in the lowest fifth (r=-0.39, n=100 areas with ≥800 tests).

In the most coastal fifth of areas this model fails 2.3 pp more often than in the most inland fifth (r=-0.29, n=100 areas with ≥800 tests).

Values shown in the quintile chart

Factor	Low Q	High Q	Gap	Correlation
MOT centre density	19.3%	23.6%	+4.3 pp	r=0.41
Urban share	23.0%	18.9%	-4.1 pp	r=-0.39
Distance to coast	23.0%	20.7%	-2.3 pp	r=-0.29

Factors that only mean something combined

Some conditions are useless on their own and informative multiplied together. Frost days alone say little — Britain barely freezes. Salt tonnage alone says little — it tracks frost. Distance to the sea alone says little. Multiply the first two and divide by the third and you get an index of how hard an area attacks a car's underside, and it lines up with the corrosion defects we actually record. We built five such combinations and tested each against our own data. Three survived; two did not, and the failures are listed here on purpose — a proxy that was never checked is decoration. One survivor only survived on the second attempt: built from a crude stand-in for street parking it failed outright, and rebuilt from the census — terraced streets carrying more cars than they have driveways — it works, and carries information the salt index does not.

Composite area indicators, each tested against a defect rate we measure

Composite	Built from	Tested against	r	Verdict
Underbody corrosion	frost days × salt load ÷ (distance to coast + 1)	share of tests with a corrosion defect	+0.42	holds (116 areas)
Tyre wear	rain days × annual miles ÷ age at first tyre advisory	share of tests failing on tyres	+0.45	holds (116 areas)
Overnight corrosion	terraced housing × cars per household × frost days	share with a corrosion defect	+0.41	holds (102 areas) — and adds signal beyond the first index
Deferred maintenance	deprivation × advisory-to-failure conversion ÷ labour rate	cars repeating the same advisory	−0.26	fails (118 areas)
Powertrain stress	engine capacity ÷ kerb weight	suspension, brake and emissions failures	−0.16	fails (22 models)

The deprivation result is the one worth dwelling on. The intuition that poorer areas defer repairs is strong enough that most people treat it as established. We tested it twice — once on raw failure rates (r = 0.04) and again, more fairly, on whether an advisory turns into a failure — and it did not hold any of the three times we tried it — on raw failure rates, on advisory-to-failure conversion, and again with deprivation measured properly inside each nation rather than England alone. We are closing it. What does predict local failure rates is the density of test centres, which is a statement about testing, not about cars.

All external-factor correlations (machine-readable)

Factor	r	n areas	Low-Q fail %	High-Q fail %	Gap pp	Low-Q factor	High-Q factor
MOT centre density (per 10k vehicles)	0.408	100	19.3	23.6	+4.3	5.2	8.3
Urban share (0–1)	-0.385	100	23.0	18.9	-4.1	0.4	1
Distance to coast (km)	-0.290	100	23.0	20.7	-2.3	5.8	80.8
Income deprivation (score)	-0.223	86	21.8	19.8	-1.9	0.1	0.2
Terrain gradient (% grade)	0.217	60	20.7	22.6	+2.0	0.5	3.7
Road-salt proxy (g/m²-yr)	-0.046	100	21.9	21.6	-0.3	225.8	642.6
Frost days (days/year)	-0.045	100	22.9	21.7	-1.2	11.8	36.5

Deprivation uses England IMD 2019 income score only (Scotland SIMD is a different scale). Salt proxy is a simplified NWSRG-style dry-salt sum from air Tmin; coastalness is distance from the area centroid to the nearest coastline.

Every dot is a postcode area — size = how many were tested there, colour = share failing. These figures are not age-adjusted: coastal and rural areas often run older fleets and salted roads, so higher raw fail rates do not automatically mean a worse local stock of this model.

Map labels: Scotland · N. England · Wales · London · S. West. Colour scale: 17%–29% failing.

Seat Leon survival: which cars are still on the road

By age 19 stands out at 9.1%, against 100% at the ages 4–6 reference level.

higher = larger sharecompare shares in percentage points

Chart axes: car age, years · survival vs ages 4–6 · scale 0–105%.

By age 19, only about 9% as many cars of this family present for MOT as at ages 4–6 (reference n≈29,486); survivors still fail at 38.0% vs 12.2% at age 4. Older cars that still appear are a selected subset — weaker ones have already left.

How many miles does a Seat Leon last?

100,000+ miles is highest at 26.5%; 200,000+ miles is lowest at 0.8% — the gap is 25.7 percentage points.

higher = larger sharecompare shares in percentage points

Of 296,027 tests of this family with a usable odometer in 2024, 26.5% had reached 100k miles, 5.9% had reached 150k miles, 0.8% had reached 200k miles. This is a cross-section of cars still presenting for MOT, not a full birth cohort.

How many years is a Seat Leon likely to last?

Bought at age 5 is highest at 7.8 years; Bought at age 15 is lowest at 3.2 years — the gap is 4.6 years.

bigger number = longer remaining lifeyears on the observed survival curve

estimateEstimate only — not a warranty: a typical 10-year-old example of this family (~89,485 miles median) has about 3.3 expected years of further MOT-present life on the 2024 survival curve. Derived from how many cars of each age still appear for test, not from a longitudinal panel.

Seat Leon faults that come together

Body & structure + Emissions & leaks stand out at 11.83×, against 1× if the faults were independent.

above 1.0× = more than expectedbelow 1.0× = less

Defects in «Body, chassis, structure» and «Noise, emissions and leaks» appear together 11.83× more often than chance (1,174 co-occurrences in the same test; lift≥1.3, n≥500).

Lift = how many times more often both groups appear on the same test than if independent. Thresholds: lift ≥ 1.3, co-occurrences ≥ 300.

Is low mileage better for a Seat Leon?

Cars driven under 5,000 miles a year stands out at 11.9%, against 21.3% for cars driven 8,000–12,000 miles a year.

higher = larger sharecompare shares in percentage points

At matched ages 5–14, cars averaging under 5k miles/year fail at 11.9% vs 21.3% for 8–12k miles/year — 9.3 pp lower (n_low=19,642, n_normal=93,663). In this family low annual use is associated with fewer MOT fails, not more — the ‘garage queen’ penalty is not visible in overall fail rates. Diesel alone: 13.7% low-use vs 23.4% normal (-9.8 pp).

Which Seat Leon engine is best?

diesel 1.5–1.8 is highest at 115.9; petrol 1.8–2.0 is lowest at 70.9 — the gap is 45 points.

below 100 is betterabove 100 is worse100 = normal for this model at that age

Splitting this model by fuel alone hides the thing that actually differs. Within the same badge, the diesel 1.5–1.8 runs at 115.9 against this model's own age norm while the petrol 1.8–2.0 runs at 70.9 — a spread of 45 points between two cars that share a name.

Read this one with more care than the rest of the page. Age is held constant, but who buys which engine is not: the largest capacity in a range is often a performance or executive variant that is garaged, cherished and lightly driven, while the smallest is frequently a fleet or entry car worked hard from new. The gap below is real in the test records; how much of it is the engine and how much is the owner, this data cannot separate. Bands under 5,000 tests are not shown.

Best year for a Seat Leon, and the years to avoid

Build year 2019 is highest at 110.6; Build year 2014 is lowest at 91.8 — the gap is 18.8 points.

below 100 is betterabove 100 is worse100 = normal for this model at that age

build year vs the same model at the same age · 100 = as expected

The best build year here is 2014 and the weakest is 2019. Comparing build years sounds simple and is not: within a single year of testing, a car's build year and its age are the same number, so a naive comparison of years is a comparison of ages wearing a disguise. Each year below is measured against the same model at the same age in other cohorts, across six years of testing — 16 of 19 years come out distinguishable from their own model's age norm.

Two limits worth knowing before you act on this. Age, test year and build year are locked together by arithmetic, so the test-year effect is taken from the observed national failure level of each year rather than estimated — it is an adjustment, not a solution.

Seat Leon MOT repair costs

The MOT-failure repair budget per test runs from £73.34 to £139.35, against £54.85 for the test itself.

bigger number = costs morepounds per test, MOT-failing faults only

Multiply how often each component fails on this model by what that repair usually costs, and you get the amount an owner should expect to budget per test for MOT-failing faults only — roughly £73 to £139, on top of the test fee itself. It is a budgeting figure, not a quote: the spread between a set of pads and a set of discs is most of the range.

Prices are modal quotes from a hand-kept catalogue of published UK garage guides — we do not scrape the booking sites, their terms forbid it, so this list is short and updated by hand with a source and date against each line. Each line prices one typical repair in that group, not a full remedy, and only groups our catalogue actually covers are counted. The contrast worth noticing is the second card: the legal maximum for the test has been £54.85 since 2010, while the repairs it uncovers have followed inflation the whole time.

For scale from a different direction: Warrantywise, which sees used-car warranty claims rather than test failures, puts the average claim at £2,052 across the ten highest-claim models it ranks and £539 for Honda, the lowest-claim make in its index (Warrantywise index 2026, 1.6 million claims, cars aged 3–15). Those sit an order of magnitude above the figures in this table, and the gap is the point: a warranty claim is a gearbox or an engine, which almost never fails an MOT, while the faults that do fail one are corrosion, lamps and tyres, which no warranty pays for. The two numbers answer different questions and neither replaces the other.

Seat Leon running costs for a fleet

Vehicles failing at age 10 stand out at 21%, against 16% at age 5 in the same 100-vehicle fleet.

higher = larger sharecompare shares in percentage points

The number a fleet manager needs is not the failure rate, it is the year the car starts costing more. Between age 11 and 12 the failure rate of this model jumps by 6.75 percentage points — the steepest single step in its life, and the natural planning point for replacement.

Repair spend uses the same modal prices as the section above, so it inherits the same limits: one typical repair per component group, not a full remedy. Downtime is the gap between the failed test and the passed re-test, which is the window a vehicle is legally off the road.

Seat Leon rust problems: where they corrode

Age-standardised corrosion susceptibility stands out at 0.77×, against 1× for the national age-standardised rate.

above 1.0× = rusts more than averagebelow 1.0× = rusts less

This Seat Leon fails on corrosion at about the average rate once age is held constant, and its owners live in areas that are saltier than most for the models we publish. Both point the same way and reinforce each other: it resists corrosion even though its owners live in saltier areas than most.

Corrosion is the one failure mode that is as much about geography as about the car. We keep the two apart on purpose: a model can look rusty simply because it is popular in Scotland, and a model can look clean simply because it is bought in Surrey. Blending them into a single score would hide which of the two is doing the work.

Exposure is this model's tests weighted by an area corrosion index built from frost days, salt load and distance to the coast — the composite validated at r = 0.42 against corrosion defects we actually record. It is published as a rank, not a raw score, because every mainstream model skews towards low-corrosion areas for the simple reason that most of Britain's cars are in the south. Susceptibility is standardised to the national age profile, so an old fleet does not get labelled a rusty model.

Does a Seat Leon advisory become a failure?

Lamps, reflectors and electrical equipment are highest at 22.5%; Identification of the vehicle is lowest at 3.4% — the gap is 19.1 percentage points.

higher = more likelypercentage is the observed transition probability

chance the same component fails at the next MOT, given an advisory now

This is the question an advisory note actually raises, and it needs six years of test history to answer. We followed the same vehicles from one MOT to the next across 2019–2024 and measured how often a component that was merely advised came back as a genuine failure at the next test.

Read it as a budgeting horizon, not a prophecy: the most likely component above turns into a failure for about 22 in 100 cars, and the median gap is 12 months and roughly 6,164 miles. The rest were repaired, sold, scrapped, or simply held. Rows with fewer than 500 tracked advisories are not shown.

What will fail next on a Seat Leon?

Lamps, reflectors and electrical equipment after a failure at age 15-19 are highest at 24.8%; Suspension after a passed at age <3 is lowest at 1.8% — the gap is 23.0 percentage points.

higher = more likelypercentage is the observed transition probability

The same chains, cut differently: given a car's age and how its last test went, which component most often causes trouble at the following one.

The pattern that repeats across every family: a failure at one test roughly doubles the chance of a failure on the same component at the next one, and an advisory sits about half-way between a clean pass and a failure. Age bands in years; probabilities are per car, not per defect item.

Seat Leon ownership: what six years of MOTs show

The ten-day re-test pass rate is highest at 49.8%; The later re-test pass rate is lowest at 2.5% — the gap is 47.3 percentage points.

higher = larger sharecompare shares in percentage points

Failing is usually a same-week event, not a disaster. Of 180,402 failures followed through to their re-test, 47.73% were repaired and passed the same day and 49.77% within ten days; the median gap is 1 day. 427,373 defect items were cleared in the process.

Per mile driven, not per year. Dividing failures by the miles that actually went onto the odometers between consecutive tests gives 0.316 failures per 10,000 miles, on a median of 6,822 miles a year across 207,093 chains. This is the number to compare between models — an annual rate quietly rewards cars that barely leave the drive.

Two populations hide inside one model. 31.58% of these cars strung together three or more tests with nothing recorded at all, while 30.5% carried the same advisory three times or more — the same fault, noted, ignored, noted again. When you buy used you are buying one of those two histories, and the MOT record shows which.

Odometer anomalies: 0.688% of 207,187 chains show a reading lower than the previous test, with a median drop of 20,486 miles. We call this an anomaly and not fraud on purpose — instrument swaps, imports, unit mix-ups and keying errors all land in the same bucket. Obvious typos (drops under 100 miles or over 90% of the reading) are already excluded.

Seat Leon MOT: quick answers

Seat Leon MOT Risk Index stands out at 92, against 100 for a car with the same age profile.

below 100 is betterabove 100 is worse100 = normal for this model at that age

What is the Seat Leon first-time MOT pass rate?

78.51% of first attempts passed in 2024 (296,118 tests). This is the first-time figure: retests after repair are excluded. Basis: first-time, excluding retests.

Why does this number differ from other sites?

Other sites often report a pass rate that includes retests or counts all attempts. Our 21.49% figure is the first-time initial failure rate, using 296,118 primary tests as the denominator (first-time, excluding retests). The age-adjusted MOT initial-failure ratio 92 is shown separately because raw rates compare fleet age as well as cars.

Compare the Seat Leon with other cars

Seat Leon is highest at 92; Audi A1 is lowest at 91.3 — the gap is 0.7 points.

below 100 is betterabove 100 is worse100 = normal for this model at that age

Same brand

All Seat MOT statisticsSeat Ibiza MOT stats

Similar risk

Audi A1 (index 91.3)Ford Kuga (index 91.3)Mercedes A Class (index 91.3)

Same size class

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