- M -

Mode

A term generally used to describe a particular set operating characteristics.

Mode Door

A diverter door within the duct system for directing air through the heater and / or evaporator core.

Model Year

The year of vehicle manufacture, as designated by the manufacturer; not consistent with the calendar year.

Modem

An abbreviation for modulator-demodulator; a modem is a device and/or program that enables a computer to transmit data over telephone lines.

Modesty Panel

The panel below the bumpers that conceals the chassis components. Also known as modesty skirt.

Modesty Skirt

Same as modesty panel.

Modification

To alter or change from the original.

Modified

A vehicle that has been reworked for high-performance operation.

Modified MacPherson Strut

A type of MacPherson strut suspension that uses shock struts with coil springs mounted between the lower arms and spring pockets in the cross member, to absorb minor road vibrations by the chassis rather than fed back to the driver through the steering system.

Modified Strut

A strut suspension where the coil spring is not part of the assembly and is independently located between the lower control arm and the frame.

Modular Wheel

A wheel made of different sections that are bolted or riveted together.

Modulated Vacuum

A vacuum signal regulated to a particular level.

Modulator

1. A device that varies the frequency amplitude and phase of electromagnetic waves. 2. A device that regulates hydraulic line pressure in a transmission to meet varying load conditions.

Module

A semi-conductor control unit for an electronic-ignition fuel or any other system.

Modulus Of Elasticity

The point at which a material has been bent too far to snap back into shape.

Moisture

Humidity, dampness, wetness, or small droplets of water.

Moisture Ejector

A valve mounted to the bottom or side of the supply and service reservoirs that collects water and expels it every time the air pressure fluctuates.

Mold

1. A hollow form into which molten metal is poured to form a part. 2. A fungus. 3. To form or shape an object.

Mold-bonded Linings

A pad assembly made by applying adhesive to the pad and then pouring the uncured lining material onto the pad in the mold. The assembly is cured at high temperatures to fuse the lining and adhesive to the pad.

Molded

To rejoin body panels using a filler material to conceal the seam.