Saab 99 gl vs Saab Sonett 3: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Saab 99 gl
56%
MOT pass rate · 15,388 vehicles
Saab Sonett 3
100%
MOT pass rate · 1 vehicles
Verdict: On MOT pass rate the Saab 99 gl (56%) and Saab Sonett 3 (100%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Head to head
| Measure | Saab 99 gl | Saab Sonett 3 |
|---|---|---|
| MOT pass rate | 56% | 100% ✓ |
| MOT failure rate | 44% | 0% ✓ |
| Faults & advisories per test | 3.0 | 0.3 ✓ |
| Dangerous-fault share | 0% | 0% |
| Average mileage | 135,154 mi | 70,071 mi |
| Sample size (vehicles) | 15,388 | 1 |
Most common faults
Saab 99 gl
- Parking brake: efficiency below requirements (3.7.B.7)
- Exhaust emissions carbon monoxide content excessive (7.3.B.1a)
- Nearside Rear Suspension component mounting prescribed area is excessively corroded (2.4.A.3)
- Offside Rear Suspension component mounting prescribed area is excessively corroded (2.4.A.3)
- Offside Rear fog lamp not working (1.3.2b)
- Parking brake lever has no reserve travel (3.1.6b)
Saab Sonett 3
- Offside Outer Front constant velocity joint gaiter deteriorated, but preventing the ingress of dirt (2.5.C.1a)
Reliability FAQ
On MOT pass rate the Saab 99 gl (56%) and Saab Sonett 3 (100%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Full Saab 99 gl report Full Saab Sonett 3 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.