The most reliable Ford engines by the numbers
Ford's most reliable engines come from two families: the proven Duratec naturally aspirated range and the post-2018 revised EcoBoost units. Both prioritise real-world durability over headline specifications — exactly what used car buyers need.
Complete ranking
| Rank | Engine | Score | Verdict |
|---|---|---|---|
| 1 | Duratec 2.0 | 88/100 | BEST |
| 2 | Duratec 2.5 | 82/100 | BUY |
| 3 | Coyote 5.0 V8 | 82/100 | BUY |
| 4 | Zetec-SE | 80/100 | BUY |
| 5 | Sigma 1.25 | 78/100 | BUY |
Duratec 2.0 — 88/100
2.0L NA I4
Found in: Fiesta, Focus, Mondeo, Mondeo 2.0 Duratec
Even the best engines have some issues to watch:
- Timing chain (long life, minor at high mileage) — severity minor, typically appears around 150.000 km
- Coolant system maintenance (age) — severity minor, typically appears around 100.000 km
Full Duratec 2.0 reliability report →
Duratec 2.5 — 82/100
2.5L NA I5
Found in: Focus, Kuga, Mondeo
Even the best engines have some issues to watch:
- Coolant system (same family as 2.0) — severity minor, typically appears around 100.000 km
Full Duratec 2.5 reliability report →
Coyote 5.0 V8 — 82/100
Coyote 5.0 V8 (Gen 1-4)
Found in: Mustang
Even the best engines have some issues to watch:
- Oil consumption on track use — severity minor, typically appears around 40.000 km
- Timing chain/phaser tick (Gen 1) — severity moderate, typically appears around 80.000 km
Full Coyote 5.0 V8 reliability report →
Zetec-SE — 80/100
Zetec-SE 1.25/1.4/1.6
Found in: Fiesta, Focus
Even the best engines have some issues to watch:
- Head gasket (rare) — severity moderate, typically appears around 120.000 km
Full Zetec-SE reliability report →
Sigma 1.25 — 78/100
Sigma 1.25 (FUJA/SNJA/STJA)
Found in: Fiesta
Even the best engines have some issues to watch:
- Thermostat housing crack — severity minor, typically appears around 60.000 km
Full Sigma 1.25 reliability report →
Generated from EngineScope's reliability database. Reviewed by the editorial team. Methodology →