Under the back seat
It's located under the back seat.
The Buick LeSabre was produced from 1959 until 2005 by General Motors. This full-size car was based on, and named after, the 1951 Buick Le Sabre concept car that was designed by Harley Earl.
In the back seat...Pull up the actual seat in the middle. Comes up very easily and battery is beaneath it. Very clever place to store a battery and it keeps battery from going dead on those really cold mornings.
NO This site will help you understand what years of buick lesabre are compatible. http://en.wikipedia.org/wiki/Buick_LeSabre Just copy and paste it into your browser, it covers the lesabre from it's birth to it's end in 2005.
0.060" (Although you didn't ask, do consider going with the same "heat range" plugs recommended for the 2005.)
Is there a drain plug on a 2005 Buick century
On a 2005 e320 4matic, the battery is located in the trunk. It is in the rear side, next to the spare wheel.
In your Fuel Tank!
The 2005 Shadow Sabre is Shaft Driven
You have to remove the axle nut, caliper & bracket, and the torx bit type bolts on the hub.
In the trunk.
I got a new battery for the engine and my remote quit working.