Porsche 944 — MOT statistics 2024

The Porsche 944 failed 25.36% of 2,252 first MOT attempts in 2024 ("first-time", excluding retests). Adjusted for the age of the fleet, its initial-failure ratio is 73.4 (100 = expected for its age profile). This car fails its MOT about 27% less often than expected for its age. Small sample — treat with care.

Age-adjusted peer: Audi TT (index 73.4) — the two published results are 0.0 index points apart.

Porsche 944 common problems: what actually fails the MOT

Body, chassis, structure are well below the reference at 7.0 per 100 tests, against 15.1 per 100 tests across UK vehicles of the same ages.

higher bar = fails more oftenrate per 100 tests

family vs national — matched to UK vehicles of the same ages — top component groups, per 100 tests. Legend: This family · National avg. Combined labels: family / national average. A gap here reflects how these vehicles are driven, used and maintained as well as how they were built — an MOT defect is a test outcome, not a breakdown.

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

Porsche 944 MOT advisories: what gets flagged

Brakes are highest at 39.7 per 100 tests; Non-component advisories are lowest at 6.8 per 100 tests — the gap is 32.9 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.

If a car like this fails, does it fail again?

A failure rate does not say whether a failure is a one-off or the start of something. This follows the same vehicles into their next ordinary MOT a year later — retests after a repair are excluded, because they follow a failure by definition. 2019-2024.

A failed test raises next year's chance of failing again by 5.6 percentage points. The failure most likely to come back is steering — 30.1% of those vehicles fail again next year. Some of this is the vehicle and some is the owner: a car that was let go once tends to be let go again. One caveat: a car that fails may be sold or scrapped rather than tested again, so these figures describe the vehicles that came back.

Adjusted for how much these are actually driven

The headline index adjusts for the fleet's age. Wear, though, follows mileage: a three-year-old taxi and a three-year-old garage queen sit in the same age band. These two rows compare every car with vehicles of the same age, and then with vehicles of the same age and the same annual mileage, 2019-2024, on 13,183 tests. Both stand on the six-year corpus so they are measured on identical data — compare them with each other, not with the headline index above, which is measured on 2024 alone.

Split by how much each car is driven. This is a split by annual mileage, not by body type — the MOT record does not say whether a car is a conversion. Within each band the index compares with vehicles of the same age driven as much.

Mileage changes little here (-2.9 points): this fleet is driven about as much as the vehicles it is compared with. One limit to keep in mind: mileage is partly a result of how often a car breaks down — one that spends weeks in the workshop covers fewer miles — so the mileage-matched figure can understate a real weakness. Tests with no usable odometer reading are left out of it.

How does the Porsche 944 perform as it gets older?

The 944 at age 20 is well below the reference at 30.8%, against 41.0% for all vehicles of the same age.

higher = larger sharecompare shares in percentage points

Chart axes: car age, years · failure-rate scale 0–47%.

Takeaway: solid line: this family; dashed: all cars.

How dangerous are Porsche 944 MOT failures?

Major defects stand out at 72.0 per 100 tests, against 52.8 per 100 tests nationally.

higher bar = fails more oftenrate per 100 tests

Chart values: Minor 11.4 · Major 72.0 · Dangerous 6.7.

Per 100 tests on this family. National average: Minor 14.2 · Major 52.8 · Dangerous 11.2 per 100.

Does the month of a Porsche 944 MOT matter?

Jan is highest at 32.6%; May is lowest at 25.1% — the gap is 7.5 percentage points.

higher = larger sharecompare shares in percentage points

Chart scale: 24%–34%.

bars: Porsche 944 · dashed: all class-4 cars

Takeaway: the spread between best and worst month is 7.5 percentage points — noticeable seasonality. 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 18.9% of these cars were first registered in March with another17.1% in September — 36% 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. That shapes how many cars are tested each month — not how often they fail: the busiest months here are not the worst ones, so read the failure line on its own and the volume behind it separately.

Porsche 944 average mileage by age

At age 20+, the middle half of 944s runs from 64,518 miles to 135,192 miles, against 94,512 miles as the median.

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

Does high mileage mean more Porsche 944 MOT failures?

All ages together, split by odometer (the bands are not split by age, so higher-mileage cars are also older and this mixes wear with age): 27.2% of the lowest-mileage cars failed versus 33% of the highest.

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

A typical 20+-year-old 944 has ~94,512 miles on the clock. Much more — ask why; much less — check for gaps in the MOT history.

Where in Britain the Porsche 944 fails its MOT most

Gloucester area is highest at 42.0%; Southend-on-Sea area is lowest at 10.2% — the gap is 31.8 percentage points.

higher = larger sharecompare shares in percentage points

Toughest areas	% failing	vs model overall
Gloucester (GL)	42.02%	+14.4 pp
Bristol (BS)	41.46%	+13.9 pp
Bath (BA)	40.32%	+12.7 pp
Bournemouth (BH)	39.15%	+11.6 pp
Newport (NP)	38.68%	+11.1 pp

Easiest areas	% failing	vs model overall
Southend-on-Sea (SS)	10.24%	-17.4 pp
Dartford (DA)	17.09%	-10.5 pp
Wakefield (WF)	18.31%	-9.3 pp
Bradford (BD)	18.7%	-8.9 pp
Chester (CH)	19.72%	-7.9 pp

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: 22%–41% failing.

How many miles does a Porsche 944 last?

100,000+ miles is highest at 58.6%; 150,000+ miles is lowest at 20.1% — the gap is 38.5 percentage points.

higher = larger sharecompare shares in percentage points

Of 15,250 tests of this family with a usable odometer in 2024, 58.6% had reached 100k miles, 20.1% had reached 150k miles. This is a cross-section of cars still presenting for MOT, not a full birth cohort.

Porsche 944 faults that come together

Seatbelts & SRS + Suspension stand out at 7.69×, against 1.00× if the faults were independent.

above 1.0× = more than expectedbelow 1.0× = less

Defects in «Lamps, reflectors and electrical equipment» and «Visibility» appear together 3.74× more often than chance (701 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. A pair is listed from 5 tests with both faults; the lift is shown from 20, and called above chance only when its 95% interval excludes 1 (see rough estimates).

Porsche 944 MOT repair costs

The MOT-failure repair budget per test runs from £97.35 to £184.97, 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 £97 to £185, 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.

Porsche 944 rust problems: where they corrode

Age-standardised corrosion susceptibility is well below the reference at 0.64×, against 1.00× for the national age-standardised rate.

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

This Porsche 944 fails on corrosion much less often than average once age is held constant, and its owners live in areas that are about typical for the models we publish.

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 Porsche 944 advisory become a failure?

Brakes are highest at 13.4%; Non-component advisories are lowest at 0.0% — the gap is 13.4 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 13 in 100 cars, and the median gap is 12.4 months and roughly 222 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 Porsche 944?

Lamps, reflectors and electrical equipment after a failure at age 20+ are highest at 18.1%; Visibility after a passed at age 20+ is lowest at 5.2% — the gap is 12.9 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.

Porsche 944 ownership: what six years of MOTs show

The ten-day re-test pass rate is highest at 65.9%; The later re-test pass rate is lowest at 13.5% — the gap is 52.3 percentage points.

higher = larger sharecompare shares in percentage points

Failing is usually a same-week event, not a disaster. Of 2,369 failures followed through to their re-test, 20.64% were repaired and passed the same day and 65.85% within ten days; the median gap is 3 days. 6,559 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 1.858 failures per 10,000 miles, on a median of 383 miles a year across 3,109 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. 43.72% of these cars strung together three or more tests with nothing recorded at all, while 26.4% 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: 3.643% of 3,349 chains show a reading lower than the previous test, with a median drop of 9,911 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.

Porsche 944 MOT: quick answers

Porsche 944 MOT Risk Index is well below the reference at 73.4, 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 Porsche 944 first-time MOT pass rate?

74.64% of first attempts passed in 2024 (2,252 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 25.36% figure is the first-time initial failure rate, using 2,252 primary tests as the denominator (first-time, excluding retests). The age-adjusted MOT initial-failure ratio 73.4 is shown separately because raw rates compare fleet age as well as cars.

Compare the Porsche 944 with other cars

BMW X5 is highest at 73.5; Toyota Estima is lowest at 73.2 — the gap is 0.3 points.

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

Same brand

All Porsche MOT statisticsPorsche Taycan MOT statsPorsche Cayenne MOT stats

Similar risk

Audi TT (index 73.4)BMW X5 (index 73.5)Toyota Estima (index 73.2)

Same size class

how Saab 900 compareshow BMW I8 compareshow Toyota Vellfire compares

By area

Porsche 944 MOT failure rate by postcode area

By failure group

Porsche 944 body, chassis and structure failuresPorsche 944 brakes failuresPorsche 944 vehicle identification failuresPorsche 944 lamps, reflectors and electrics failuresPorsche 944 noise, emissions and leaks failuresPorsche 944 road wheels failuresPorsche 944 seat belts and airbags failuresPorsche 944 steering failuresPorsche 944 suspension failuresPorsche 944 tyres failuresPorsche 944 visibility failures