Begin by removing the front quarter panel retaining bolts. The front quarter panel's will come off. Reverse the process to install your new front quarter panels.
Tucked into the quarter panels on the front of the car
You don't need to remove front door panels, the speaker grills come out.
See below article-
Replace the bulb.
Yes, I have had to replace both on my van.
Rear or front? rear
You need to be more specific as to front or rear.
Pull the inside door panels off and you will see there bolted in the door.
Pull the inner door panels off and the speakers are mounted in the door.
The kick panels are the interior trim panels , in front of the doors , at the drivers and front passengers feet
To replace the front speakers in a Toyota Sienna the door panels must first be removed. With the door panels removed the speakers will be easily accessible and the mounting screws can be loosen. Unplug the speakers and remove them. Install the new speakers.
The kick panels are the interior trim panels in front of the front doors where the driver ( left kick panel ) and the passenger ( right kick panel ) have their feet