115 selected
- Not filled in
- Macchi
- Mack
- Mack Priestman
- Magirus
- Magirus (Magirus-Deutz)
- Magirus-Deutz (Magirus)
- Magister
- Maico
- Maillet
- Malaguti
- MAN
- MAN Saviem
- Manitou
- Manitowoc
- Manjit
- Map
- March
- Marcos
- Marion
- Marrel
- Marshall, Sons & Co.
- Martin
- Martini
- Marussia
- MAS
- Maserati
- Massey Ferguson
- Massey-Harris
- Massey-Harris Ferguson
- Mastretta
- Matador
- Matford
- Mathis
- Matra
- Matra Simca
- Matra-Simca
- Maudslay
- MAVA-Renault
- Maxim
- Maxwell
- Maybach
- Mazda
- Mazzanti
- MBK
- MBX
- Mc Carthy
- MCA
- McClean
- McCormick
- McDonnell Douglas
- MCI (Motor Coach Industries)
- McLaren
- McLeagle
- Meadows
- Mega
- Melkus
- Menck & Hambrock
- Mercedes
- Mercedes (Mercedes-Benz)
- Mercedes-AMG
- Mercedes-Benz
- Mercedes-Benz (Mercedes)
- Mercedes-Sanber
- Mercer
- Mercury
- Merryweather
- Merzario
- Messerschmitt
- Meteor
- Metrobus
- Meyers Manx
- MG
- MG Lola
- Michigan
- Midland
- Miesse
- MiG
- Mikoyan-Gurevich
- Mikrus
- Mil
- Minardi
- Minerva
- Mini
- Mini Cooper
- Minissima
- Minneapolis-Moline
- Mirage
- Mitsubishi
- Mitsubishi Fuso
- Mitsuhirato
- Mitsuoka
- MLRS
- Mochet
- Momo
- Monarch
- Monica
- Monopole
- Monteverdi
- Morane
- Moretti
- Morgan
- Morgan Olson
- Morita
- Morris
- Moskvitch
- Mosler
- Moto Guzzi
- Motobécane
- Motor Coach Industries (MCI)
- MT-S
- Muir-Hill
- Munch
- MV Agusta
- MVS
- MZ