Can't say for sure re passenger seat, but when I removed the driver's seat I got an SRS code displayed that will need clearing with a carsoft or star diagnostic scan tool.
FYI: You do not have to remove the passenger seat to gain access to the battery bay. Just move the seat forward as far as it can go.
Also to come full circle and put a coda on this
ancient thread:
The reason the batteries are mid-car under the passenger seat instead of in the traditional location, is because it's safer and better overall! You need power to fire airbags, shift gears, unlock doors, roll down windows, open sunroofs, turn on hazard lights, etc. Things you might need to do after having a major collision. Having the battery mid-ship dramatically increases the odds it will remain intact and operational after a major accident. It also keeps it free from exposure to the outside world and thus clean and relatively temperature stable. If you have ever looked at your battery under the seat, you will see it looks brand new...clean & pristine with no corrosion. I believe this is part of the reason that my battery has lasted so long.
I can't find any negatives to this location. There are jump start points under the hood, so that isn't a concern. And if you need to do electrical work on the car, you don't have to remove it to pull the negative cable. Just roll the seat forward, pop the plastic cover and there it is...easy to get to.
