Iridium Spark Plug
An iridium spark plug has a very fine centre electrode made of iridium, a hard metal that resists wear.
What is Iridium Spark Plug?
It lasts much longer than a standard nickel plug. The fine tip needs less voltage to spark. Many modern engines are fitted with iridium plugs from the factory. Change intervals are often much longer, but follow the service schedule.
How it works
The high melting point and hardness of iridium let the electrode stay sharp and small for longer.
Why it matters for your car
Fine electrodes break easily; do not adjust the gap unless the maker allows it. Always use the type and heat range specified for the engine.
Other terms
- Actuator Test (Output Test)
- Blower Motor (Heater Fan)
- Brake Fade
- Crankshaft Oil Seal
- Crosswind Assist
- Dual-mass Flywheel
- Flasher Relay (Turn Signal Relay)
- Fuel Level Sensor
- Fuel Rail
- GPS Navigation System
- Hybrid Battery
- Idle Speed Control
- Inline Engine (Straight Engine)
- Maximum Roof Load
- Neutral Safety Switch (Inhibitor Switch)
- SOHC (Single Overhead Camshaft)
- Synchromesh (Synchroniser)
- Timing Chain
- Vehicle Overloading
- Wheel Spacers