Renault Laguna vs Renault Unknown: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Renault Laguna
65%
MOT pass rate · 305,568 vehicles
Renault Unknown
79%
MOT pass rate · 107,113 vehicles
More reliable
Verdict: On MOT pass rate, the Renault Unknown is the more reliable of the two — 79% pass first time versus 65%. It's one signal among several; check the full breakdown below.
Head to head
| Measure | Renault Laguna | Renault Unknown |
|---|---|---|
| MOT pass rate | 65% | 79% ✓ |
| MOT failure rate | 35% | 21% ✓ |
| Faults & advisories per test | 2.2 | 1.4 ✓ |
| Dangerous-fault share | 0% ✓ | 3% |
| Average mileage | 121,362 mi | 104,332 mi |
| Sample size (vehicles) | 305,568 | 107,113 |
Most common faults
Renault Laguna
- Nearside Front Tyre worn close to the legal limit (4.1.E.1)
- Offside Front Tyre worn close to the legal limit (4.1.E.1)
- Nearside Rear Tyre worn close to the legal limit (4.1.E.1)
- Offside Rear Tyre worn close to the legal limit (4.1.E.1)
- Oil leak
- Front Brake pad(s) wearing thin (3.5.1g)
Renault Unknown
- Offside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
- Nearside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
- Windscreen damaged but not adversely affecting driver's view (3.2 (a) (i))
- Oil leak, but not excessive (8.4.1 (a) (i))
- Parking brake efficiency below requirements (1.4.2 (a) (i))
- Rear Brake pad(s) wearing thin (1.1.13 (a) (ii))
Reliability FAQ
On MOT pass rate, the Renault Unknown is the more reliable of the two — 79% pass first time versus 65%. It's one signal among several; check the full breakdown below.
Full Renault Laguna report Full Renault Unknown report Most reliable cars
Pass rates are computed over completed (pass/fail) MOT tests. Reliability also depends on age, mileage and upkeep — see each model's page for the full picture.