Automakers
308 marques and groups. 186 have US model-year catalog rows (EPA, 1978–2027). Official links are labelled verified only when the site was actually retrieved.
308 in this list, shown a letter at a time.
H
- Harbinger MotorsAutomaker
No catalog rows yet
Official siteverified 29 Sep 2026
- HavalAutomaker
No catalog rows yet
Official siteverified 29 Sep 2026
- Hennessey Special VehiclesManufacturer group
No catalog rows yet
Official siteverified 25 Sep 2026
- HESS & EISENHARDTMarque
1 model family observed
No current official site verified.
- HondaManufacturer group
79 model families observed
Official siteverified 25 Sep 2026
- HongqiMarque
No catalog rows yet
Official siteunverified link
- HummerMarque
2 model families observed
No current official site verified.
- HyptecAutomaker
No catalog rows yet
Official siteverified 29 Sep 2026
- HyundaiMarque
147 model families observed
Official siteverified 25 Sep 2026
- HYUNDAI MOTOR COMPANYMarque
1 model family observed
No current official site verified.
- Hyundai Motor GroupManufacturer group
No catalog rows yet
Official siteverified 25 Sep 2026