Car manufacturer I
| Name | Number of models |
|---|---|
| Ic | 26 |
| Ic Corporation | 2 |
| Independence | 3 |
| Independent Mobility | 3 |
| Indian | 10 |
| Infiniti | 35 |
| Infinity | 2 |
| Innovative | 3 |
| Interco | 1 |
| International | 113 |
| International Harvester | 244 |
| Interstate | 5 |
| Intrigue | 9 |
| Isuzu | 56 |
| Isuzu Truck | 1 |
| Itasca | 74 |
| Iveco | 25 |