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Ignition Coils and Coil Packs

Shop OEM replacement ignition coils and coil packs for Toyota, Holden, Ford, Mitsubishi, Nissan, Hyundai, Kia, BMW, Mazda and more. Direct plug-in fit with no modifications required. Use the Vehicle Part Finder to confirm the right coil for your vehicle.

Shop Our Ignition Coils and Coil Packs

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What Does an Ignition Coil Do?

The ignition coil is an induction transformer that converts your battery's 12-volt supply into the high-voltage charge - typically 20,000 to 45,000 volts - needed to fire the spark plugs and ignite the air-fuel mixture in each cylinder. There are two common types: coil packs where a single coil serves multiple cylinders, and coil-on-plug (COP) units where each cylinder has its own dedicated coil. Modern engines almost universally use COP systems for more precise ignition timing control.

Symptoms of a Failing Ignition Coil

A failing coil typically affects one or more cylinders and causes noticeable drivability problems. Common symptoms include:

  • Rough idle or engine shaking - especially at a standstill
  • Misfires under acceleration or load
  • Hesitation or stumbling when pulling away
  • Increased fuel consumption
  • Check Engine light with codes P0300 to P0312 (cylinder-specific misfire codes)
  • Engine cuts out under hard acceleration

A prolonged misfire from a faulty coil forces unburnt fuel into the exhaust system and can damage your catalytic converter - turning a straightforward coil replacement into a much more expensive repair.

Fitment and Technical Accuracy

Ignition coils are not universal. Primary and secondary resistance values, connector type, mounting configuration, and output voltage all vary between makes, models, and engine variants. Every coil in our range is matched to OEM specifications and cross-referenced against factory part numbers for an exact fit. If you are unsure which coil suits your vehicle, use the Vehicle Part Finder or filter by make and model on this page.

Why Buy From SensorGal?

SensorGal is a 100% Australian owned family business stocking aftermarket OEM replacement ignition coils and coil packs for Toyota, Holden, Ford, Mitsubishi, Nissan, Hyundai, Kia, BMW, Mazda, Subaru, Mercedes-Benz and Suzuki. Every order placed before 12 noon is dispatched same day from our Cranbourne VIC warehouse via express post. All parts carry a 1-Year Australian warranty and our no-fuss returns policy.

Frequently Asked Questions

How do I know if my ignition coil has failed?

The most reliable way is to scan for fault codes with an OBD2 scanner - codes P0300 to P0312 indicate cylinder-specific misfires. You can also swap the suspect coil with one from a different cylinder and check if the misfire moves with the coil. A coil that is cracked, carbon-tracked, or producing a visible spark to the engine block has failed.

Should I replace all ignition coils at once or just the faulty one?

If one coil has failed due to age or heat damage on a high-mileage vehicle, the remaining coils are likely in similar condition. Replacing all coils at the same time prevents repeat breakdowns and is more economical than multiple call-outs. If the failure was caused by a specific fault such as a leaking valve cover gasket, replace only the affected coil once the root cause is fixed.

Do I need to replace spark plugs when I replace ignition coils?

It is good practice to inspect spark plugs when replacing ignition coils. A worn or fouled spark plug increases the load on the coil and can cause premature coil failure. If the plugs are approaching their service interval or show signs of wear, replacing both at the same time saves labour and reduces the risk of repeat ignition issues.

What are the symptoms of a failing crankshaft angle sensor on ignition?

A failing crank angle sensor causes ignition timing to be incorrect or absent, resulting in misfires, hard starting, rough idle, stalling, or a no-start condition. Fault codes P0335-P0338 are commonly associated with this fault.

How often should I replace ignition leads?

Ignition leads typically last 60,000-100,000 km depending on the vehicle and operating conditions. Signs of worn leads include misfires, rough idle, poor fuel economy, and visible cracking or carbon tracking on the lead insulation.

What is the difference between a coil pack and a coil-on-plug ignition coil?

A coil pack serves multiple cylinders from one unit via ignition leads. Coil-on-plug (COP) ignition has one individual coil per cylinder sitting directly on the spark plug. COP systems are more common on modern vehicles and generally provide stronger, more precise spark.

Can a faulty ignition coil damage my catalytic converter?

Yes. A misfiring cylinder caused by a faulty ignition coil sends unburnt fuel into the exhaust, which can overheat and damage the catalytic converter. If you have a misfire fault code, address it promptly to protect your catalytic converter.