hobbs

Besides a Optima Red Top. My experience with the Red Top on my wife's IS300 tells me that they are not the same quality they once were.

duffster

Optimas have been crap for a while. I just put in a Batteries Plus AGM, sealed so no water/corrosion issues. 3 or 4 year warranty, cant remember but they have 2 different types for the G37.

hobbs

Tips for getting it out and back in, as it looks like a PITA. Does the surrounding trim need to be removed?

duffster

That's easy. Remove the battery cover, then remove all the plastic push pins that hold that trim piece in place (use a small screw driver to pop up the center pin a bit then grab the outer piece with your fingers and pull straight up). If you have to remove the plastic cowl section I believe it comes out with 1 push pin hidden on the fender seam and a clip holding it to the drivers side section which is easy to see how it comes undone.

Surfnazi

Well interstate and optima are same company. You'll get a bad battery from and manufacturer. Last redtop optima lasted 6 years cause car was sold with it.