You will need a special set tool set including coil spring compressors, and, I believe, 12, 14 mm, 1 inch sockets, a torque wrench (make sure that it go as much as 211 N*m) and maybe a hammer too. Loosen tire wheel bolts. Lift the car up put it on stand jacks. Remove the wheel. Remove the abs wire if you have it. Remove the bolt attaching the brakes hose. Remove the nut from the stabilizer bar link. If you have electronic suspension you will have more stuff to do. Remove two nuts and then bolts on the lower side of the strut. Remove the strut from steering knuckle. After that remove thee nuts holding the strut on the upper part of it (located under the hood). After that take carefully out the strut (you might have to use a hammer). After that use coil spring compressors, make sure that you compressed the coil enough to remove the upper holding part. After that put the strut bumper on the new strut install the upper part including the bearing. Assembly is reversed to what is written above.
Torque specifications (N*m):
The upper nut: 49
Stabilizer bar link: 39
Lower strut nuts: 211
Upper strut nuts: 80
Brakes hose bolt: 29
Struts in the front, shocks in the rear.
Struts.
The 2011 Toyota Avalon has 55.8 in. of front hip room.
The 2014 Toyota Avalon has 55.1 in. of front hip room.
The 2004 Toyota Avalon has 55.2 in. of front hip room.
The 2003 Toyota Avalon has 41.7 in. of front leg room.
The 2007 Toyota Avalon has 41.3 in. of front leg room.
The 2009 Toyota Avalon has 41.3 in. of front leg room.
The 2011 Toyota Avalon has 38.9 in. of front head room.
The 2011 Toyota Avalon has 59.4 in. of front shoulder room.
The 2014 Toyota Avalon has 58.2 in. of front shoulder room.
The 2004 Toyota Avalon has 41.7 in. of front leg room.