M
- Morgan
- Mitsubishi
- Mastretta
- Mini
- Maico
- Marcos
- Mitsubishi Fuso
- Moto Guzzi
- Marquette
- MG
- Mercruiser
- Maybach
- Moretti
- Maserati
- Marmon
- Marmon Herrington
- Moon
- Mack
- Moto-Ski
- Moskvich
- Mazda
- Marauder
- Marathon
- Mercedes-Benz
- Messerschmitt
- Maxwell
- Matra
- Morris
- Mercury
- Midwest Motor Vehicles
- Motor Trike
- Metropolitan
- McLaren
- Motor Coach Industries
- Mustang
C
- CZ
- Christini AWD Motorcycles
- Case
- CAT
- CFMOTO
- Citroën
- Cushman
- California Scooter Co.
- Coleman Powersports
- Case IH
- Club Car
- Can-Am
- Checker
- Cunningham
- Cleveland
- Country Coach Motorhome
- Crosley
- Cole
- Coda
- Chandler Limited
- Cisitalia
- Campagna
- Crown Coach
- Covington Cycle City
- Cleveland CycleWerks
- Cagiva
- Cannondale
- Cub Cadet
- Chevrolet
- Chrysler
- Cubik Scooters
- CPI USA
- Chop Shop Customs
- Cadillac
- Cobra Motorcycle
- Champion Sidecars
- Continental
- Cord
A
- Argo ATV
- Arctic Cat
- Auburn
- Autocar
- AC
- Aston Martin
- Alfa Romeo
- Avanti
- American LaFrance
- Austin Healey
- Audi
- Alvis
- Acura
- Amphicar
- Ariel
- Abarth
- Apollo
- AM General
- Allstate
- American Classic Motors
- Alpine
- Arnolt-MG
- ATK North America
- American Austin
- Amen Chassis Works
- Arnolt-Bristol
- Autocar LLC.
- Apperson
- AlphaSports
- Armstong Siddeley
- American Lifan Industry
- ASÜNA
- Accurate Cycle Engineering
- Adly Moto
- Austin
- Allard
- Aprilia