Genuine Ford Spark Plugs

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What Is a Ford Spark Plug?

A Ford spark plug is a critical engine component responsible for igniting the air-fuel mixture inside the combustion chamber. It delivers an electrical spark that starts combustion, powering the engine and keeping your vehicle running smoothly. Spark plugs play a major role in engine performance, fuel efficiency, and reliable starting—making them essential for the overall health of your Ford.

How Often Should You Change Ford Spark Plugs?

Most Ford spark plugs should be replaced every 60,000–100,000 km, depending on the plug type and driving conditions. High‑performance or turbocharged engines may require more frequent replacement. Always refer to your Ford service schedule for exact intervals. It is also recommended to get it inspected every 30,000km.

Signs of Bad or Worn Spark Plugs

If your spark plugs are failing, you may notice:

  • Rough idling or vibration
  • Hard starting
  • Reduced fuel economy
  • Poor acceleration or sluggish performance
  • Engine misfires
  • Increased exhaust emissions

Replacing worn spark plugs can greatly improve engine performance, restore smooth acceleration, and improve fuel efficiency. Using genuine Ford spark plugs ensures the correct heat range, material, and fitment—designed specifically for your Ford’s engine.

How to Change Ford Spark Plugs

Changing spark plugs can be done at home, but Ford recommends having the job performed at an authorised service centre to ensure proper installation and engine safety. However, for experienced DIY car owners, here is a general guide:

On most Ford engines, spark plugs are located at the top or side of the cylinder head or under ignition coils on modern coil-on-plug systems. You may require some basic hand tools to replace spark plugs. Here are the basic steps:

  1. Remove engine cover (if fitted).
  2. Disconnect ignition coil harness and unbolt the coil.
  3. Clean around the spark plug hole using compressed air to prevent debris entering the engine.
  4. Remove the old spark plug using the spark plug socket.
  5. Check the new spark plug gap (if applicable—many come pre‑gapped).
  6. Install the new spark plug gently by hand, then torque to the manufacturer’s recommended setting.
  7. Reinstall ignition coil and reconnect the wiring harness.
  8. Repeat for each cylinder and replace the engine cover.

Important: Over‑tightening can crack the cylinder head; under‑tightening can cause misfires. Always follow Ford torque specifications.

Jefferson Ford Parts Spark Plug Range

At Jefferson Ford Parts, we stock a complete range of genuine Ford spark plugs for all models and years. Whether you drive a Ford Ranger, Focus, Mustang, Fiesta, Everest, Territory, or Transit, we have the right spark plug designed specifically for your engine.

If you can't find the exact part you need, just reach out via webchat, and our team will be happy to assist you.