Which of the following is NOT a feature aimed at reducing maintenance in the JLTV?

The correct choice highlights a feature that is counterproductive to the goal of reducing maintenance. Complex hydraulic systems typically involve more intricate components, connections, and operational procedures, which can lead to increased chances of failure and more extensive maintenance requirements. In contrast, the other options—modular component design, an accessible engine compartment, and simple wiring layout—are all designed with maintainability in mind.

Modular component design allows for easy replacement and upgrading of individual parts without needing to disassemble large sections of the vehicle, thereby significantly reducing downtime and maintenance complexity. An accessible engine compartment ensures that mechanics can easily reach engine components for routine checks and repairs, minimizing labor time. A simple wiring layout reduces the potential for electrical issues and streamlines troubleshooting and repairs. Each of these features aligns with the objective of reducing maintenance efforts, underscoring why complex hydraulic systems would not fit within this framework.