Glossary of Auto Terms

DriverSide's Car Dictionary has the most comprehensive definitions of automotive terms. This auto glossary can help you decipher what your mechanic is fixing and what the purpose or function of the particular auto part or accessory is for. We have taken the mystery out of automotive service jargon, so that you don't have to.



This important little guy amplifies a small amount of electrical current and sends it to the spark plugs by way of the distributor, making it a critical part of the ignition system.

See Also:
Starter Solenoid
Open Circuit
Spark Plug Gap
Ignition System
Spark Advance
Spark Plug Cable
Knock Sensor

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