A strut bearing is noisy and must be replaced. Technician A says to replace the strut cartridge. Technician B says to replace the front coil spring. Who is correct?

In this scenario, neither technician's response is fully appropriate related to the issue of a noisy strut bearing. A strut bearing, which facilitates the smooth rotation of the strut assembly during steering and suspension movement, typically does not require a replacement of either the strut cartridge or the front coil spring merely because it is noisy.

Replacing the strut cartridge is typically associated with damping issues or fluid leaks, while replacing the coil spring addresses structural integrity or ride height concerns. However, a noisy strut bearing might only necessitate the replacement of the bearing itself. Therefore, since neither technician addresses the core of the problem adequately, the conclusion is that neither is correct.