Automotive Glossary

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B

Battery Carrier

A tray to hold the battery, usually under the bonnet.

Battery Grease

Petroleum jelly used on battery terminals.

Battery module

A generic term meaning a collection of battery cells and control systems. Often relates to EVs or HEVs.

Battery Posts

The main connections on a battery.

Battery terminal

See Battery Post

Battery Volts

A term used to describe the voltage of the particular system. This is often 12V - but could be 14V when the engine is running.

BCM

Body Control Module

BDC

Bottom dead centre. The position of the crankshaft when the piston is at its lowest position in the cylinder. The crankshaft is at 180° of rotation from the top dead centre 0° position.

Bead

Part of the tyre.

Beam Axle

Type of non-independent suspension.

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