Ford Sierra 1991
Cars aged 34 · Data updated: 2026-11-09 (week 46) · source: VDA / Transeksta, CC BY 4.0
Pass the inspection first time
36.3% ±7.7 pp
M1 average at 34 years – 38.3%
n = 146 inspections
Expected mileage now (median)
208,152 km
Percentiles · cars aged 34
p10 45k
p25 118k
p50 208k
p75 265k
p90 317k
| km | |
|---|---|
| p10 | 44,903 km |
| p25 | 117,668 km |
| p50 | 208,152 km |
| p75 | 264,819 km |
| p90 | 316,749 km |
Too few readings for this model – class mileage is shown.
Inspection verdicts
Sierra 1991, n = 146
| % | |
|---|---|
| No defects | 13.0% |
| Minor defects | 23.3% |
| Major defects | 58.9% |
| Dangerous defects | 4.8% |
Odometer inconsistencies
26.8%
cars whose reading dropped between inspections
CO (petrol, idle)
0.60%
53.8% over the limit · n = 132
What these numbers say
36.3% of 1991 Ford Sierra cars pass the technical inspection at the first attempt (n = 146), against an average of 38.3% for all 34-year-old M1 cars.
This model has too few odometer readings at this age, so the comparison is all 34-year-old M1 cars: typical mileage 208,152 km, half of them between 117,668 km and 264,819 km.
An odometer inconsistency was recorded for 11 cars, 26.8% of those assessed.
The median idle CO reading is 0.60% vol; 53.8% of measurements exceed the limit.
Figures are not adjusted for how intensively cars are used. How we calculate