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Renault Laguna exhaust, emissions and leaks problems

DVSA MOT tests 2022–2025 · 7,225 MOT tests · Updated

At 14 years, 2.8 in 100 MOT tests of the Renault Laguna failed on exhaust, emissions and leaks, against 5.1 for all class 4 vehicles the same age (all test years; 7,225 MOT tests) [1].

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  • Against all class 4 vehicles the same age: fails less often than all class 4 vehicles the same age (0.5–0.6×) (all test years), 201 MOT tests with a fail
  • By age: seen at 10 ages from 11 to 20 years, 39,310 MOT tests
  • MOT tests at 14 years: 7,225 for the Renault Laguna

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

What the MOT tests show

What we know

2.8 fails per 100 MOT tests at 14 years, against 5.1 for all class 4 vehicles tested at 14 (all test years). The Renault Laguna fails less often here.

Why it matters

An exhaust, emissions and leaks fail stops the car passing until it is fixed.

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.

Renault Laguna exhaust, emissions and leaks fails by age

Renault Laguna exhaust, emissions and leaks fails per 100 MOT tests by ageSolid line: the Renault Laguna. Dashed line: all cars the same age. The table below lists every value.024611 years: 2.4 per 100 (all cars 3.2), 2,067 MOT tests1112 years: 2.1 per 100 (all cars 3.7), 3,979 MOT tests1213 years: 2.6 per 100 (all cars 4.3), 5,219 MOT tests1314 years: 2.8 per 100 (all cars 5.1), 7,225 MOT tests1415 years: 3.0 per 100 (all cars 5.7), 6,662 MOT tests1516 years: 3.3 per 100 (all cars 6.2), 5,004 MOT tests1617 years: 3.7 per 100 (all cars 6.5), 3,826 MOT tests1718 years: 4.7 per 100 (all cars 6.8), 2,300 MOT tests1819 years: 4.8 per 100 (all cars 7.0), 1,719 MOT tests1920 years: 5.4 per 100 (all cars 7.0), 1,309 MOT tests20
Fails per 100 MOT tests by age, all first-use years pooled. Renault Laguna All class 4 vehicles the same age Shaded: over 18 years, survivors only.
AgeMOT testsFails per 100All class 4 vehicles the same age
112,0672.43.2
123,9792.13.7
135,2192.64.3
147,2252.85.1
156,6623.05.7
165,0043.36.2
173,8263.76.5
182,3004.76.8
19*1,7194.87.0
20*1,3095.47.0

All first-use years of the Renault Laguna 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 14 years

Advisories (not fails)

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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 Renault Laguna, not the average

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

Other Renault Laguna problems

Exhaust, emissions and leaks on rival models

Questions people ask

Does the Renault Laguna have more exhaust, emissions and leaks problems than other cars?

0.5 to 0.6 times the exhaust, emissions and leaks fail rate of all class 4 vehicles the same age at 14 years (all test years), from 7,225 MOT tests. The interval is clear of 0.8 in the same direction at 5 of the 10 ages seen (ages up to 18 with at least 100 MOT tests with a fail).

How common are Renault Laguna exhaust, emissions and leaks problems?

2.8 in 100 MOT tests at 14 years failed on exhaust, emissions and leaks, against 5.1 for all class 4 vehicles the same age (all test years; 7,225 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, 39,310 MOT tests. 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