It is important to check the **vehicle's steering** when it becomes **too stiff or loose**. This may indicate a problem in the steering system, which is crucial for maintaining control of the vehicle and ensuring safety while driving. A steering that does not respond adequately can make maneuvers difficult and increase the risk of accidents.

On the other hand, if the vehicle does not veer off when releasing the steering wheel, this indicates that the steering is functioning correctly, and it would not be necessary to check it for this reason. Additionally, regular tire wear is normal and is not directly related to steering problems, but rather to tire maintenance, such as ensuring they are properly inflated and not overly worn.

Therefore, checking the steering is essential when specific problems such as stiffness or looseness occur, to ensure safe and efficient vehicle handling.