It's generally a good idea to replace the strut mounts when replacing the struts. Much in the same manner that the struts and shocks should be replaced together (when applicable), you should consider ...

It's quite common for strut top bearings of MacPherson Strut front suspension to need replacing after a few years. As you steer, the suspension strut turns in this bearing and eventually wear occurs.

On many vehicles with strut-type suspension designs, the front struts (which include the springs and shock absorbers) are mounted with bearings or bearing plates that serve as the upper pivot points ...

A car making noise when turning often points to issues in the steering, suspension, or brakes, with common culprits being whining from low power steering fluid, clunking from bad tie rods/ball joints, ...