Ignition coils and spark plugs Ford: problems by model and engine

Documented faults, from most to least important

Severity × frequency. Below each one, the Ford models it appears in.

- Medium severityFrequency: Occasional1.0 EcoBoostMisfires and engine warning light caused by the wiring harnessFord documented in a technical service bulletin that the engine wiring harness can rub against the exhaust heat shield on the 2018-2019 automatic EcoSport, which turns on the engine warning light with misfire fault codes. Spark plugs and coils are also common wear items on this turbocharged three-cylinder.
In C-Max II, EcoSport, Fiesta VIII, Focus III, Focus IV and Puma and 3 more models
- Low severityFrequency: Common1.0-1.6 8v Endura-E, Duratec 8v and RoCamCoil and ignition leads: misfiresThe ignition coil is a recurring fault in these engines: Oficina Brasil describes it as a common defect of the Zetec RoCam (one cylinder starts to misfire), and fiches-auto.fr records it on the Ka 1.3 and on the Fiesta IV and V 1.3. Old leads shorten the life of a new coil.
In Escort V, Fiesta IV, Fiesta V and Ka I
- Low severityFrequency: Occasional1.25/1.4/1.6 Ti-VCTMisfires from coils or spark plugsThere are documented cases of ignition coils replaced several times on the Ford Focus II (1.6 Ti-VCT) and of spark plugs changed at 60,000 km on the Ford Fiesta 1.25, which points to earlier-than-expected ignition system wear on some units.Appears at around 60,000 km
In B-Max, C-Max I, C-Max II, EcoSport, Fiesta IV and Fiesta V and 6 more models
- Low severityFrequency: Occasional1.0, 1.2 and 1.4 FireFaulty ignition coil (misfire, engine warning light)The 1.2 8v Fire's ignition coil can fail and switch on the engine warning light, with rough running; there is one documented case replaced at 40,000 km in the Fiat 500. It is one of the issues that recurs most in the sources consulted for this engine, though always in a minority of cases.
In Ka II
- Low severityFrequency: OccasionalMZR gasolinaMisfires from spark plugs and ignition coils in petrol MZR enginesSpark plugs appear among the fault points of the Mazda2 DE in the ADAC statistics cited by gebrauchtwagenberater.de, and fiches-auto.fr attributes the misfires of the Mazda3 1.6 to coils, spark plugs or sensors.
In Mondeo III

By Ford model

Open yours to see only the faults that affect it, by engine and by year.

Engines and gearboxes involved

Parts for your Ford for faults with the ignition coils

Add the model and engine in the shop, or better still the registration plate or VIN, to see only the parts that fit.

Ignition coil
- Buy part at Autodoc (affiliate link, opens in a new tab)

Affiliate links: if you buy from these shops, MotorFiable may receive a commission at no cost to you. Check compatibility against the registration plate or VIN before ordering. Affiliate links

Frequently asked questions

What faults with the ignition coils do Ford cars have?

In 22 models from Ford there are 5 documented faults with the ignition coils. The most important: misfires and engine warning light caused by the wiring harness, coil and ignition leads: misfires and misfires from coils or spark plugs. Each fault has its own page with the affected years and versions, the symptoms and the repair cost.

Which Ford models have the most problems with the ignition coils?

Ford Fiesta IV (2 faults), Ford Fiesta V (2 faults), Ford C-Max II (2 faults) and Ford Focus III (2 faults).

Which Ford engines have faults with the ignition coils?

1.0 EcoBoost (1 fault), 1.0-1.6 8v Endura-E, Duratec 8v and RoCam (1 fault), 1.0, 1.2 and 1.4 Fire (1 fault), 1.25/1.4/1.6 Ti-VCT (1 fault) and MZR gasolina (1 fault).