chain
The 2003 Toyota Echo takes 22" drivers side and 14" passenger side replacement windshield wiper blades.
108
when it breaks
3.6 litres
Its included in the following instructions for changing out the post cat O2 sensor. http://www.carspace.com/guides/Toyota-Echo-How-to-change-post-catalytic-O2-Sensor
It is underneath
$1500 to $2000
There are none.
4 x 100
Needle nose pliars.
It is 30mm