The rear brakes on the Toyota Sienna are drum brakes. This means, a drum that resembles a bowl rests on the wheel hub. When you press on the brake pedal, two brake shoes press against the inside of the drum pad. This slows your vehicle down to a stop. The brakes are responsible for 20% of the braking. The front brakes do the rest of the work. Therefore, you will not have to change the rear brakes often.
Place a bottle jack under the frame just in front of the driver' side rear tire, jack the vehicle up, place a jack stand under the frame in front of the jack and then lower the vehicle onto the jack stand.
Remove the lug nuts using the tire iron supplied with the Sienna. Pull the wheel off and place it off to the side.
Pull out on the brake drum to remove it. Often, the brake drum seizes onto the wheel hub and you must use a brake drum puller to remove it. Place the three fingers of the brake drum onto the backside of the brake drum and place the threaded post of the brake drum puller in the center of the wheel hub. Turn the threaded post with a socket and ratchet until the brake drum pulls free of the wheel hub.
Remove the spring that holds each brake shoe onto the wheel hub using a pair of pliers.
Pull the brake shoes off the wheel hub, place the new ones onto the wheel hub and secure them using the springs and pliers.
Place the new brake drum onto the wheel studs and center on the wheel hub. Pound it into place using a rubber mallet.
Place the wheel back onto the Sienna, secure it using the lug nuts, tire iron, and then lower the vehicle to the ground using the jack.
Repeat the process on the passenger side drum brake.
