Toyota Aygo vs Toyota Sienta hybrid auto: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Toyota Aygo
81%
MOT pass rate · 285,772 vehicles
Toyota Sienta hybrid auto
85%
MOT pass rate · 13 vehicles
Verdict: On MOT pass rate the Toyota Aygo (81%) and Toyota Sienta hybrid auto (85%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Head to head
| Measure | Toyota Aygo | Toyota Sienta hybrid auto |
|---|---|---|
| MOT pass rate | 81% | 85% ✓ |
| MOT failure rate | 19% | 15% ✓ |
| Faults & advisories per test | 1.7 | 1.0 ✓ |
| Dangerous-fault share | 3% | 0% ✓ |
| Average mileage | 60,869 mi | 62,086 mi |
| Sample size (vehicles) | 285,772 | 13 |
Most common faults
Toyota Aygo
- Nearside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
- Offside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
- Offside Rear Tyre slightly damaged/cracking or perishing (5.2.3 (d) (ii))
- Nearside Rear Tyre slightly damaged/cracking or perishing (5.2.3 (d) (ii))
- Front Brake disc worn, pitted or scored, but not seriously weakened (1.1.14 (a) (ii))
- Front Brake pad(s) wearing thin (1.1.13 (a) (ii))
Toyota Sienta hybrid auto
- Offside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
- Nearside Front Outer Tyre worn close to legal limit/worn on edge (5.2.3 (e))
- Nearside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
- Rear Registration plate lamp inoperative in the case of multiple lamps or light sources (4.7.1 (b) (i))
- Nearside Rear Suspension arm pin or bush excessively worn (5.3.4 (a) (i))
- Offside Front Anti-roll bar linkage ball joint dust cover no longer prevents the ingress of dirt (5.3.4 (b) (ii))
Reliability FAQ
On MOT pass rate the Toyota Aygo (81%) and Toyota Sienta hybrid auto (85%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Full Toyota Aygo report Full Toyota Sienta hybrid auto 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.