Ford Focus ST 3 Tdci (2015)
2015 Ford Focus ST 3 Tdci
CarHunch analysed 118 real MOT records for the 2015 Ford Focus ST 3 Tdci. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.
The 2015 Focus ST-3 TDCI has a first-time pass rate of just 61.6%, well below the UK average of 80%, which signals genuine reliability concerns for this generation and engine combination. The good news is that dangerous defects are absent from this cohort, so while these cars fail more often, the failures aren't safety-critical.
At 75,745 miles average, these vehicles are running higher than you'd expect for a 2015 model, which partly explains the elevated failure rate—age and mileage compound wear on the ST-3's more highly-strung diesel engine. With 0.22 average failures per vehicle and no advisories recorded, specific issues are scattered rather than systemic, so before buying, get a pre-purchase inspection focused on turbo condition, fuel injectors, and DPF health on any example you're considering.
What to check before buying a 2015 Ford Focus ST 3 Tdci
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 Focus ST 3 Tdci
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 |
|---|---|---|---|
| Diesel (99%) | 117 | 61.3% | 0.22 |
| Gas Bi-Fuel (1%) | 1 | 100% | 0 |
Mileage Distribution
Most 2015 Ford Focus ST 3 Tdci 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 2015 Ford Focus ST 3 Tdci vehicles fall between 62,719 and 93,274 miles.
2015 Ford Focus ST 3 Tdci — Still on the Road
Strong survival — 51 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 2019–2025.
MOT History Averages
Found a specific Ford Focus ST 3 Tdci?
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Other model years — Ford Focus ST 3 Tdci: