Why is it essential to check suspension and steering components before alignment?

It is essential to check suspension and steering components before alignment primarily because worn or damaged parts can lead to inaccuracies in alignment adjustments. The suspension and steering system must be in optimal condition to ensure that the alignment settings are accurate and effective. If components are worn, such as ball joints, tie rods, or bushings, they may allow for excessive play or movement, resulting in misalignment even after adjustments have been made. This can cause issues such as uneven tire wear, poor handling, and reduced vehicle stability.

In summary, ensuring that all components are in good condition is crucial for making precise alignment corrections and achieving proper vehicle handling, which directly affects safety and performance. The focus should be on the mechanical integrity of the system to enable accurate alignment adjustments.