Specification:
 

Type :Strut & Spring Assembly
Quantity:   2pcs
Interchange Part Number:    172455/172456
Placement on Vehicle:   Left, Rear, Right
Fitment For Type :   Direct Replacement
 

Reference OEM Number:172455/172456

Fitment For:

Make    Model    Year    Engine    Body Style    Location
For toyota    Avalon    2004    V6 3.0L    Sedan    Rear Left and Right
For toyota    Avalon    2005    V6 3.5L    Sedan    Rear Left and Right

Warranty:
 

30 days free return and exchange
5 years warranty

Time to replace your struts if you are troubled by bellow:

The car makes unusual noises.
The car sink when the road is bad or load is heavy. 
Oil Leakage. 
Frequent and irregular tire wear. 
It's hard to control the car. 
Poor stability makes you feel very uncomfortable.

How to Install :

Step 1: Before You Lift the Vehicle, Loosen Lug Nuts One Full Turn.
Step 2: Jack up Vehicle and Use Jack Stands for Safety & Remove the Tire from the Rotor.
Step 3: (Wheel Alignment Is Necessary After Strut Replacement.) Marking the Position of All the Bolts Will Help Keep the Alignment Close to Original and save Time Aligning. Use a Colored Pencil to Mark the Old Strut on the Bolt.
Step 4: Use Penetrating Oil (Such As Wd40) to Coat Any Rusted Fasteners, Let Soak for Approximately 1 Hour.
Step 5: (Optional) While Waiting for Oil to Soak, Take This Time to Inspect All Other Components That May Need Replacement (Brake Pads, Rotors, Brake Hoses, Ball Joints, Cv Boots, Tie Rod Ends, Bushings, Sway Bars, Etc).
Step 6: Remove Any Brake Line or Wire Attachments from the Strut Body. Do Not Disconnect Brake Lines (If Possible)! Opening Brake Lines Will Require Bleeding of the Brake System.
Use Extreme Caution When Removing Brake Lines from Your Struts, As Any Damage to Your Brake Line Can Result in Expensive and Time Consuming Repairs.
Step 7: Remove Sway bar Attached to the Strut Assembly or Control Arm.
Step 8: Remove the Tie Rod (Only If It Attached to the Body of the Strut, If Not Leave It Attached to the Steering Knuckle).
Step 9: Remove the Strut to Knuckle Bolts at the Bottom of the Strut. on some Vehicles, the Brake Caliper and Rotor May Need to Be Removed to Gain Access.
Step 10: Remove the Upper Mounting Plate Bolts Located in the Engine or Trunk Compartment. Do Not Remove the Center Retaining Nut! It Is Not Safe to Unload the Spring from the Assembly in This Position.
Step 11: Carefully Remove the Old Strut Assembly from the Vehicle. Be Very Cautious Not to Let the Strut "Drop" down on Your Brake Line, Rotor or Drum.
Step 12: Install the New Complete Strut Assembly in the Reverse Order As Above (Steps 11-6). Using an Anti-seize Compound on All Fasteners Is Suggested.
Step 13: Carefully Double Check Your Work and Make Sure Everything Is Tightened to Manufacturers Torque Specifications.
Step 14: Replace the Tire the Rotor and Tighten to Manufacturers Torque Specifications.
Step 15: Slowly Lower the Vehicle down After Removing the Jack Stands. Pay Very Close Attention to Any Odd Sounds When the Vehicle Is Lowered Onto the New Complete Strut Assemblies.
Step 16: It Is Very Important That You Immediately "Road Test" Your Vehicle Right Away to Ensure That Installation Was Done Properly. Listen and Feel for Common Signs of Incorrect Installation While Driving Slowly over Speed Bumps, Rough Road or Potholes.