Morris Isis vs Morris Marina 1.3 deluxe: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Morris Isis
84%
MOT pass rate · 167 vehicles
More reliable
Morris Marina 1.3 deluxe
74%
MOT pass rate · 129,396 vehicles
Verdict: On MOT pass rate, the Morris Isis is the more reliable of the two — 84% pass first time versus 74%. It's one signal among several; check the full breakdown below.
Head to head
| Measure | Morris Isis | Morris Marina 1.3 deluxe |
|---|---|---|
| MOT pass rate | 84% ✓ | 74% |
| MOT failure rate | 16% ✓ | 26% |
| Faults & advisories per test | 1.1 ✓ | 1.9 |
| Dangerous-fault share | 0% | 0% |
| Average mileage | 38,033 mi | 54,327 mi |
| Sample size (vehicles) | 167 | 129,396 |
Most common faults
Morris Isis
- Brakes imbalanced across an axle (3.7.B.5b)
- Nearside Front Tyre worn close to the legal limit (4.1.E.1)
- Nearside Headlamp not working on dipped beam (1.7.5a)
- Horn not working (1.6.2a)
- Offside Front Shock absorbers light misting of oil or has limited damping effect (5.3.2 (b))
- Parking brake: efficiency below requirements (3.7.B.7)
Morris Marina 1.3 deluxe
- Parking brake: efficiency below requirements (3.7.B.7)
- Offside Front wheel bearing has slight play (2.5.A.3c)
- Offside Front Brake pipe slightly corroded (3.6.B.2c)
- Brakes imbalanced across an axle (3.7.B.5b)
- Windscreen washer provides insufficient washer liquid (8.2.3)
- Offside Front Suspension component mounting prescribed area is excessively corroded (2.4.A.3)
Reliability FAQ
On MOT pass rate, the Morris Isis is the more reliable of the two — 84% pass first time versus 74%. It's one signal among several; check the full breakdown below.
Full Morris Isis report Full Morris Marina 1.3 deluxe 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.