Spark Plugs Replacement Repair - Get an online auto repair estimate

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Sometimes refered to as Spark Plugs, Spark Plug, Replace Spark Plugs, Replace Spark Plug, Spark Plug Replace, Spark Plugs Replace, Plugs, Replace Plugs

Spark plugs are part of the vehicle's ignition system; they contain two electrodes across which electricity jumps to produce a spark that ignites the gas in the engine. The energy caused by the combustion is converted into energy used to power the wheels.

Spark plugs generally come one per engine cylinder and are replaced every 30,000 to 60,000 miles.

Worn spark plugs can cause poor fuel economy, poor drivability, difficulty starting the engine, and high pollution emissions.

To replace the spark plugs, the spark plug wire or ignition coil is removed from each spark plug. The spark plug is unscrewed from the engine, and a new spark plug is installed.

Mechanics' Corner: More Technical Detail

Access to the spark plugs can be very limited on modern vehicles. Some require the removal of major components—the intake manifold, pipes, and hoses—while others can be straightforward.