Commercial Driver’s License (CDL) Practice Exam 2025 - Free CDL Practice Questions and Study Guide

A common defect in the steering system of a vehicle is related to the tie rod. The tie rod connects the steering gear to the steering knuckle and plays a crucial role in ensuring precise directional control of the vehicle. If a tie rod is worn, damaged, or loose, it can lead to steering instability, abnormal tire wear, and difficulty in steering the vehicle. Additionally, a defective tie rod can compromise the overall safety and handling of the vehicle, making it essential to inspect and replace any faulty components during vehicle maintenance.

In contrast, brake pads are part of the braking system, oil leaks typically indicate issues with the engine or transmission, and suspension springs are components of the suspension system, which affects ride quality and stability but are not directly related to steering control. This distinction highlights why the tie rod is specifically identified as a common defect in the steering system.