Drawbacks to Using Iridium Spark Plugs

A female service worker reconditioning spark plugs at a Navy Air Base

As a crucial part of your gas-powered vehicle’s ignition system, spark plugs serve two maintenance purposes under the hood. Not only do spark plugs ignite the fuel-air mixture within an internal combustion engine, but they also relocate heat from the engine to the cooling system. The metal electrode on a spark plug is typically made of platinum, copper, or an iridium alloy. Are you wondering if there are drawbacks to using iridium spark plugs? Here’s what we know:

A brief history of spark plugs

A female service worker reconditioning spark plugs | HUM Images/Universal Images Group via Getty Images

There doesn’t seem to be a definitive answer as to who exactly invented the very first spark plug. Still, most sources credit the creation to Belgian-born Jean Joseph Lenoir, who invented the internal combustion piston engine around 1860.

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