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Common problems by part

SEAT Altea exhaust, emissions and leaks problems

DVSA MOT tests 2022–2025 · 8,332 MOT tests · Updated

At 15 years, 7.6 in 100 MOT tests of the SEAT Altea failed on exhaust, emissions and leaks, against 5.7 for all class 4 vehicles the same age (all test years; 8,332 MOT tests) [1].

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  • Against all class 4 vehicles the same age: fails 1.2–1.4× as often as all class 4 vehicles the same age (all test years), 636 MOT tests with a fail
  • When it starts: clear of 1.2 times from 15 years and at every older age seen
  • Most common fail: Malfunction indicator lamp: inoperative or indicates a malfunction, 1.5 per 100 MOT tests

Figures are for the model as a whole, not for one car.

What the MOT tests show

What we know

7.6 fails per 100 MOT tests at 15 years, against 5.7 for all class 4 vehicles tested at 15 (all test years). The SEAT Altea fails more often here.

Why it matters

An exhaust, emissions and leaks fail stops the car passing until it is fixed; the most common one is rated major by DVSA.

What to check

Start the car from cold and look for smoke at the exhaust, listen for blowing joints, and look under the engine and gearbox for fresh oil or fluid drips.

SEAT Altea exhaust, emissions and leaks fails by age

SEAT Altea exhaust, emissions and leaks fails per 100 MOT tests by ageSolid line: the SEAT Altea. Dashed line: all cars the same age. The table below lists every value.05108 years: 1.1 per 100 (all cars 2.1), 1,283 MOT tests89 years: 1.8 per 100 (all cars 2.4), 2,837 MOT tests910 years: 2.1 per 100 (all cars 2.8), 4,553 MOT tests1011 years: 2.1 per 100 (all cars 3.2), 5,471 MOT tests1112 years: 3.4 per 100 (all cars 3.7), 6,031 MOT tests1213 years: 4.7 per 100 (all cars 4.3), 6,430 MOT tests1314 years: 5.9 per 100 (all cars 5.1), 7,106 MOT tests1415 years: 7.6 per 100 (all cars 5.7), 8,332 MOT tests1516 years: 8.7 per 100 (all cars 6.2), 7,939 MOT tests1617 years: 9.4 per 100 (all cars 6.5), 6,231 MOT tests1718 years: 10.3 per 100 (all cars 6.8), 4,030 MOT tests1819 years: 9.9 per 100 (all cars 7.0), 1,763 MOT tests19
Fails per 100 MOT tests by age, all first-use years pooled. SEAT Altea All class 4 vehicles the same age Shaded: over 18 years, survivors only.
AgeMOT testsFails per 100All class 4 vehicles the same age
81,2831.12.1
92,8371.82.4
104,5532.12.8
115,4712.13.2
126,0313.43.7
136,4304.74.3
147,1065.95.1
158,3327.65.7
167,9398.76.2
176,2319.46.5
184,03010.36.8
19*1,7639.97.0

All first-use years of the SEAT Altea pooled at each age, against all class 4 vehicles at that age over all 2022–2025 test years. * Only survivors are still tested at this age.

What fails in the exhaust, emissions and leaks at 15 years

Fails

Advisories (not fails)

Diagnose engine warning light cost

Repair figures are estimates, not quotes: how we estimate repair costs.

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  • Model risks for this year and fuel
  • What similar cars did at their next MOT
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See a sample report

How to check on a test drive

Start the car from cold and look for smoke at the exhaust, listen for blowing joints, and look under the engine and gearbox for fresh oil or fluid drips.

The most common advisory here in MOT records: Engine oil leaks: leak, but not excessive.

Check one SEAT Altea, not the average

The figures here describe SEAT Altea cars as a group. These free tools answer for one car. Each line says what the tool reads.

Other SEAT Altea problems

Exhaust, emissions and leaks on rival models

Questions people ask

Does the SEAT Altea have more exhaust, emissions and leaks problems than other cars?

1.2 to 1.4 times the exhaust, emissions and leaks fail rate of all class 4 vehicles the same age at 15 years (all test years), from 8,332 MOT tests. The interval is clear of 1.2 in the same direction at 4 of the 12 ages seen (ages up to 18 with at least 100 MOT tests with a fail).

How common are SEAT Altea exhaust, emissions and leaks problems?

7.6 in 100 MOT tests at 15 years failed on exhaust, emissions and leaks, against 5.7 for all class 4 vehicles the same age (all test years; 8,332 MOT tests).

What is the most common SEAT Altea exhaust, emissions and leaks fail?

1.5 in 100 MOT tests at 15 years: Malfunction indicator lamp: inoperative or indicates a malfunction (127 MOT tests with it).

At what age do SEAT Altea exhaust, emissions and leaks fails start?

15 years: from then on the rate stays clear of 1.2 times all class 4 vehicles the same age at every age seen, 28,295 MOT tests.

Sources

  1. Driver and Vehicle Standards Agency, Anonymised MOT tests and results, 2022 to 2025. DVSA MOT data, Open Government Licence v3.0, 62,006 MOT tests. Accessed 7 Oct 2026.
  2. Office for National Statistics, Consumer price inflation, local price quotes (car repair items). ONS price quotes, series 610236. Accessed 7 Oct 2026.

Parts: against all class 4 vehicles at the same age, all 2022–2025 test years pooled, not adjusted for mileage. Breakdowns and non-MOT faults are not in this data. How we compare