A vehicle head unit that combines radio reception with navigation, telephony, and media playback is classified by its principal function. If radio reception is the primary purpose, 852721 or 852729 may apply; if navigation or telephony dominates, the article may fall under a different heading. CBP has issued rulings on multi-function vehicle units, and the specific feature set and marketing of the article are key. A binding ruling is advisable for complex combinations.

Satellite radio receivers receive a radiobroadcast signal and are generally classified under 8527, typically under 852799 (radiobroadcast reception apparatus, NESOI) for home units or 852729 for vehicle-installed units. The satellite delivery method does not change the fundamental classification as a radiobroadcast receiver, though the specific tariff line should be confirmed against the article's design and any applicable CBP guidance.