Lexus part #8937333130. Does anyone know where this is located in a 97 ES 300? I've been told that it is located in the trunk and it is roughly the size of a deck of cards but I can't locate. Admittedly, I am no mechanic, but I thought I could at least locate this. I was told it is the reason my tail light failure indicator keeps coming up on my instrument panel.
Any help would be greatly appreciated.

 

in the trunk, driver's side. you're about right on the size of the thing.