Ford Focus Mk4 — Reliability

Mk4 2019–2025 1 engine

Reliability Summary

Engine EcoBoost 2.3 — 74/100 ACCEPTABLE
Known Issues 2

Engine in this model

ACCEPTABLE 74

EcoBoost 2.3

2.3L Turbo I4

Focus RS/Mustang engine. Strong output. RS head gasket recall addressed. Mustang application very re...

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Known Issues Across All Engines

Issue Engine Severity Onset
Carbon buildup (high-output DI) EcoBoost 2.3 moderate 50,000 km – 100,000 km
Turbo wear under hard use EcoBoost 2.3 moderate 80,000 km – 150,000 km