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:
Spark Plug Wire
Negative Terminal
Spark Plug
Engine Computer

Diagnose Your Car's Problem

Engine won't start? Weird sound? Strange smoke? Got something going on with your car but not sure what it is? The easy to use DriverSide Diagnostic Tool is here to help you figure it out.

Enter Zip: