Ford Fiesta Mk4/Mk5 (JA/JB) — Reliability

Mk4/Mk5 (JA/JB) 1996–2002 1 engine

Reliability Summary

Engine Sigma 1.4 — 89/100 BEST
Known Issues 4

Engine in this model

BEST 89

Sigma 1.4

Sigma 1.4 16V (Zetec-SE / Duratec)

Ford 1.4 16V Sigma petrol, sold as Zetec-SE and later Duratec (75-96 hp): Fiesta, Fusion, Focus Mk1 ...

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Known Issues Across All Engines

Issue Engine Severity Onset
Thermostat and thermostat housing failure Sigma 1.4 minor —
Exhaust manifold leak or crack Sigma 1.4 minor —
Unstable idle or failure to start (idle control valve) Sigma 1.4 minor —
Ignition coil or lead failure - misfire Sigma 1.4 minor —