Ignition Coils & Modules

Ignition Coils & Modules are part of the ignition system in petrol engines. They help generate and control the high voltage needed to fire the spark plugs at the correct time. When these parts wear or fail, the vehicle may misfire, run roughly, lose power or become harder to start.

Brands such as PAT, AFI, Tridon, NGK and Goss offer ignition components across a wide range of vehicle applications. The correct part depends on the engine, ignition system layout and whether the vehicle uses coil packs, coil-on-plug units, ignition modules or related components.

Why Ignition Coil Condition Matters

A weak or failing ignition coil can affect combustion quality. This can cause rough idle, hesitation, poor fuel economy, reduced performance and increased load on other ignition parts. In some vehicles, a faulty coil can also trigger a check engine light or store misfire-related fault codes.

Ignition coil problems are often confused with spark plug, injector, sensor or fuel delivery issues, so matching the symptom to the correct part is important. If one coil has failed, it may also be worth considering the condition of the spark plugs and other ignition components.

Common Signs You May Need Ignition Coils or Modules

• Engine misfire: The engine runs unevenly, especially under load.
• Rough idle: The vehicle shakes or feels unstable at idle.
• Hard starting: The engine takes longer to start or struggles when cold.
• Loss of power: Acceleration feels flat or inconsistent.
• Poor fuel economy: Incomplete combustion can increase fuel use.
• Check engine light: Misfire or ignition-related codes may be stored.
• Heat-related failure: Some ignition components fail more noticeably when hot.

Choosing the Right Ignition Coil or Module

The easiest way to find the right ignition coil or module is to use our simple rego finder or manually select your vehicle. This helps narrow the product list to options suited to your vehicle, so you are not sorting through ignition parts that may not match your engine or ignition system. Always check the product page for any specific notes.

When comparing suitable options, consider whether the vehicle uses individual coils, a shared coil pack, an ignition module or a complete assembly. Also check whether related parts such as spark plugs, leads or boots should be inspected at the same time.