Car manufacturer M
| Name | Number of models |
|---|---|
| Mac | 2 |
| Mack | 197 |
| Mack Trucks Inc. | 1 |
| Mac Lander | 3 |
| Magic Tilt | 2 |
| Magnum | 10 |
| Mallard | 8 |
| Manac | 11 |
| Mark Iii | 13 |
| Marque | 1 |
| Maserati | 10 |
| Mastercraft | 35 |
| Master Van | 3 |
| Maurer | 5 |
| Maxim | 2 |
| Mazda | 66 |
| Mb | 1 |
| Mci | 51 |
| Mckenzie | 14 |
| Medallion | 1 |
| Medtec | 6 |
| Mercedes | 10 |
| Mercedes Benz | 230 |
| Mercedes-benz | 3 |
| Mercury | 34 |
| Meredes Benz | 1 |
| Merhow | 3 |
| Merkur | 3 |
| Mfi | 8 |
| Mg | 6 |
| Mid Bus | 10 |
| Mid-west Choppers | 1 |
| Mini | 18 |
| Mirage | 18 |
| Mitsubishi | 49 |
| Mitsubishi Caribbean | 15 |
| Mitsubishi Fuso | 91 |
| Mobile Suites | 2 |
| Mobile Traveler | 1 |
| Mobilityworks | 5 |
| Mobil Scout | 1 |
| Monac | 1 |
| Monaco | 19 |
| Monaco Coach | 40 |
| Monaco Rv | 4 |
| Monon | 3 |
| Montana | 1 |
| Monto | 1 |
| Mopar | 5 |
| Morgan Olson | 1 |
| Moto Guzzi | 24 |
| Motor Coach | 18 |
| Motorcycle | 1 |
| Mo Trailer | 2 |
| Mustang | 1 |
| Mv Agusta | 3 |
