Parts for your 2021 Ford Fiesta-Spark plugs

2021 Ford Fiesta spark plugs

Based on Ford factory literature and parts catalogues (Owner’s Manual, Workshop Manual/ETIS, and scheduled maintenance guides), the 2021 Ford Fiesta petrol variants—1.0‑litre EcoBoost and 1.5‑litre EcoBoost (ST)—are fitted with spark plugs. Diesel Fiesta models (such as the 1.5 TDCi offered in some regions) use glow plugs instead, not spark plugs. For Australia and New Zealand, the 2021 line-up centred on petrol EcoBoost models, so spark plugs are relevant to servicing.

On a 2021 Fiesta, the spark plugs provide the timed spark that ignites the air–fuel mix in each cylinder. Good plugs mean easy cold starts, smooth idle, crisp throttle response, lower fuel use, and clean emissions. Because the EcoBoost engines run high cylinder pressures and fine fuel control, plugs with the correct heat range, reach and gap are critical. Ford specifies fine-wire iridium/platinum plugs for durability and stable spark under boost