Which statement is true about unitized control arms?

Unitized control arms are designed to integrate multiple components into a single assembly, which significantly simplifies the installation process. This design reduces the number of individual parts that need to be handled and assembled, streamlining both production and maintenance. As a result, mechanics can perform replacements and repairs more efficiently, leading to time and labor savings.

In the context of the other options, separate ball joints are not a requirement for unitized control arms, as these arms often incorporate the ball joint directly into the assembly. The weight of unitized control arms can vary, but they are generally engineered to be lighter than traditional multi-piece arms, which often leads to improved vehicle handling and fuel efficiency. Finally, while compatibility can be an issue with any automotive part due to design and manufacturer specifications, unitized control arms are often designed to fit specific models, and as such, they are not inherently incompatible. Thus, the option stating that these arms simplify installation is indeed the most accurate statement regarding their characteristics.