Do I need to remove the door panel to install this?

Yes. Full door panel removal is required to access the window regulator mounting bolts. Plan for basic hand tools and a few hours, or have a tech handle it — most shops charge between $150–300 for labor on this job.

Will this kit work on either front door, or is it specific to driver/passenger side?

Confirm which side you need before ordering — driver and passenger units are different. Check your part number or vehicle documentation to verify left vs. right fitment.

What if the window still moves slowly after installation?

A sluggish window after replacement usually points to dirt or debris in the track. Run the window up and down a few times, then clean the tracks with a dry brush or compressed air. If binding persists, double-check that the regulator bolts are tight and the assembly isn't catching.