Spark Plug Specifications
| Parameter | Specification |
|---|---|
| Plug Number | NGK ILTR6A-8G (1.6 EcoBoost — confirm by reg/VIN for 1.0/1.5) |
| Type | Iridium |
| Electrode Gap | 0.8 mm |
| Quantity Required | 3 |
| Change Interval | ~60,000–80,000 miles (check Ford schedule) |
Recommended Spark Plugs for Ford Focus
Bosch Iridium Spark Plug Set
Frequently Asked Questions
What spark plugs does a Ford Focus use?
The Ford Focus (Mk4) 1.0/1.5 EcoBoost uses a 3-cylinder iridium plug — confirm the exact NGK part by reg/VIN (the older 1.6 EcoBoost used ILTR6A-8G). The gap should be set to 0.8 mm. You need 3 plugs (the 1.0/1.5 EcoBoost is a 3-cylinder engine).
How often should I change spark plugs on a Ford Focus?
Typically 60,000–80,000 miles for iridium plugs — check your Ford service schedule. Iridium and double iridium plugs last longer than standard copper or nickel plugs.
Can I use a different brand of spark plug in my Ford Focus?
Yes, as long as it matches the exact specification — same heat range, thread size, reach, and gap (0.8 mm). NGK ILTR6A-8G from any major manufacturer (NGK, Denso, Bosch, Champion) will work.
What are the signs of worn spark plugs?
Rough idle, poor fuel economy, hesitation during acceleration, engine misfires, and difficulty starting. If your engine management light comes on with a misfire code, spark plugs are a common culprit.
How we check fitment for this guide
We cross-reference fitment figures against manufacturer specifications and OE-supplier catalogue data where available, and matched to the standard codes that actually govern fit — battery type/group sizes, wiper lengths and fitting types, bulb fitment codes, tyre size markings, and oil specifications. We work by make, model, year, engine, and build date, because a single model can take different parts across its life. Where the right part depends on your exact vehicle, we tell you to confirm by registration or VIN. More on our method →