Ford Fiesta ST Line Edition Turbo (2021)
2021 Ford Fiesta ST Line Edition Turbo
CarHunch analysed 4,157 real MOT records for the 2021 Ford Fiesta ST Line Edition Turbo. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.
The 2021 Ford Fiesta ST-Line Turbo is a reliably built car, with an 87.9% first-time pass rate that sits well above the UK average of 80%, and only 8.7% of vehicles ever developing a dangerous defect—a low concern threshold for buyers. The median mileage of just 24,214 miles is exactly what you'd expect for a three-year-old car, suggesting typical ownership patterns across the fleet.
With an average of only 0.29 failures per vehicle and 1.5 advisories, this Fiesta encounters minimal mechanical problems during its MOT years, indicating that mechanically it's straightforward and doesn't demand expensive early intervention. Before purchasing, check the specific service history and have a pre-buy inspection focus on the turbo system, as that's the most complex component that could become costly if neglected.
What to check before buying a 2021 Ford Fiesta ST Line Edition Turbo
Practical pre-purchase checks for this age and model.
- 📋 Check the full MOT history. Look for recurring advisories — slow-building issues like corrosion or brake wear patterns show up years before they become failures. Enter the reg below for a full AI analysis.
- 🔍 Inspect for corrosion in person. Brake pipes, sills, subframes, and chassis legs. Surface rust is normal at this age; structural rust is a serious problem that's expensive to fix and can fail an MOT.
- 🛞 Check tyres and brakes. The most common advisory items at this age. Budget for replacement if they're near the limit — factor this into your offer price.
- 📄 Run an HPI check. The MOT history won't show outstanding finance, insurance write-offs, or stolen status — an HPI check will.
Before you buy a Ford Fiesta ST Line Edition Turbo
MOT history is one piece of the puzzle. These checks can reveal what CarHunch can't.
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Pass Rate by Fuel Type
| Fuel type | Vehicles | Pass rate | Avg failures |
|---|---|---|---|
| Petrol (99%) | 4,115 | 87.8% | 0.29 |
| Other (1%) | 42 | 97.6% | 0.05 |
Mileage Distribution
Most 2021 Ford Fiesta ST Line Edition Turbo vehicles sit in the blue band. If the car you're looking at is outside it, it's either unusually low or high mileage for its age.
Half of all 2021 Ford Fiesta ST Line Edition Turbo vehicles fall between 17,104 and 33,001 miles.
2021 Ford Fiesta ST Line Edition Turbo — Still on the Road
Strong survival — 3,953 vehicles still getting MOTs in 2025, 100% of the peak.
Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2023–2025.
MOT History Averages
Found a specific Ford Fiesta ST Line Edition Turbo?
Enter the reg to see its individual MOT history, AI Hunches, and how it compares to this cohort.