9902.15.91 - Valve-type fuel injectors, each functional in a common rail fuel system with a pressure greater than 120 Mpa (1200 bar) (provided for in subheading 8481.80.90), the foregoing other than used goods

This HTS classification, 9902.15.91, pertains to specific valve-type fuel injectors designed for common rail fuel systems. The key defining characteristic for inclusion in this category is the system's operating pressure, which must exceed 120 Megapascals (1200 bar). These fuel injectors are intended for use in new, or non-used, automotive and industrial applications where high-pressure fuel delivery is a critical performance requirement. The "provided for in subheading 8481.80.90" note indicates the primary classification of these goods within the broader HTS structure, highlighting their function as valves.

As a temporary provision within Chapter 99, this category functions distinctly from the general goods classifications found in earlier chapters. While other chapters might list fuel injection components under machinery or vehicles, this specific code signifies a temporary measure, likely related to trade agreements or specific import restrictions. Its placement under Section XXII further emphasizes its special classification status, differentiating it from standard merchandise that falls under more permanent tariff headings.

Since 9902.15.91 is a leaf node, there are no further subcategories within this specific HTS code. Therefore, the focus for classification professionals is on precisely identifying whether a fuel injector meets the described technical specifications: valve-type, for common rail systems, operating pressure above 120 MPa, and importantly, being new or unused. Any deviation from these criteria would necessitate classification under a different HTS code.