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Automotive Acronyms M

Acronym Definition Notes / What Is / Who Is
MACS Mobile Air Conditioning Society Worldwide Founded in 1981, a non-profit trade association for the mobile air conditioning, heating and engine cooling system segment of the automotive aftermarket.
MAF mass airflow sensor Detects the mass air flow in a air intake duct or a intake manifold. Air flow sensor. Also called AFM or VAF
MAMA Midwest Automotive Media Assn. Non profit media association formed in 1991 bringing together journalists and public relations professionals involved in the automotive industry.
MAP manifold absolute pressure sensor Senses different altitudes of the vehicle. Air entering the engine is directly proportional to the air density, which is proportional to the manifold absolute pressure.
MAT manifold air temperature Temperature of the air flow inside the intake manifold.
MC mixture control Air / fuel mixture
MDP manifold differential pressure Tells the ECM how much pressure is in the intake manifold.
MECP Mobile Electronics Certification Program Certification program that was developed in 1991, by several 12-volt industry volunteers, who wanted to bring a higher level of professionalism to mobile electronics installation technician career through a national certification program.
MEMA Motor and Equipment Manufacturers Association Represented parts suppliers since 1904. Serves members through its three affiliate associations: AASA, HDMA and OESA
MERA Mobile Enhancement Retailers Association Exists to elevate the success of specialty retailers in the mobile electronics industry.
MFI multiport fuel injection See MPFI below
MIL malfunction indicator lamp Check engine light on the dash.
mm millimeters Unit of measurement
MPFI multi port fuel injection A fuel injector for each piston of the engine.
MPG miles per gallon How many miles a vehicle can run on one gallon of gas.
MPH miles per hour Speed measurement
MPI multi port injection See MPFI
MPMC Motorsports Parts Manufacturers Council A SEMA council.
ms millisecond Unit of time measurement
MSDS material safety data sheet A form with data regarding the properties of a particular substance or chemicals toxicity, health effects, first aid, reactivity, storage, disposal, protective equipment list and spill-handling procedures.
MST manifold surface temperature Intake manifold sensor
mV millivolts Unit of electrical measurement

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Note: An Acronym is a abbreviation that is formed using the individual letter components in a phrase, name, organization or thing. Listings on this page are used throughout the automotive industry.

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