Toyota Corolla 180i 1ZZ-FE Ignition Coil 02 onwards

Ignition Coil – What It Does

The ignition coil is a key part of your vehicle’s ignition system. It transforms the low voltage from your battery into the high voltage needed to ignite the air-fuel mixture in the engine. Without it, your car won’t start or run smoothly. A healthy ignition coil means reliable starting, smooth acceleration, and better fuel efficiency.

Why Replace Your Ignition Coil?

Over time, ignition coils wear out from heat, vibration, and electrical stress. A failing coil can cause engine misfires, increased fuel consumption, and even damage to components such as the catalytic converter. Replacing faulty coils keeps your engine running at its best.

Common Symptoms of a Bad Ignition Coil

• Engine misfires or rough idle
• Poor acceleration and loss of power
• Difficulty starting the vehicle
• Check Engine Light with misfire codes
• Reduced fuel economy
• Strong fuel smell or black smoke from the exhaust
• Jerking, stalling, or backfiring during driving

Maintenance Tips

Always check your ignition coils when replacing spark plugs. For consistent performance, replace coils in sets or at least in pairs. Ensure that spark plugs and wiring are also in good condition for optimal results.

FAQs About Ignition Coils

How long does an ignition coil last?
Most ignition coils last between 80,000–100,000 km, but heat and poor maintenance can shorten their lifespan.

Can I drive with a bad ignition coil?
You can, but it’s not recommended. A faulty coil can cause engine misfires, which may damage your catalytic converter and reduce performance.

Do I need to replace all coils at once?
It’s best to replace them in sets or at least in pairs. This keeps engine performance balanced and prevents uneven wear.

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