A customer brings a car to the repair shop with a complaint of a vibrating steering wheel while braking. Who is correct in the following recommendations: Service Consultant A suggests having the brake technician diagnose the problem; Service Consultant B suggests that the rotors need to be turned or replaced?

Service Consultant A's recommendation to have the brake technician diagnose the problem is correct because the symptoms described—a vibrating steering wheel while braking—typically indicate an issue with the brake system, such as warped rotors, uneven brake pad wear, or other related problems. Diagnosing the issue is an essential first step in the repair process.

It's crucial to understand the importance of a proper diagnosis before proceeding to any repair work. Diagnosing ensures that the technician identifies the exact cause of the problem rather than guessing at the required repairs. If the rotors are warped, then they may need to be turned or replaced, but it is essential to determine this through an inspection.

In this scenario, while Service Consultant B's suggestion about the rotors potentially needing to be turned or replaced can indeed be a part of the solution, it assumes a diagnosis has already been made without assessing the full scope of the issue. Thus, it is more prudent to first have a technician conduct a thorough diagnosis to provide an accurate assessment of what the car truly needs for repair.