I have a MKIV with the original IRS, Installed the battery before we put the body on. Used a odyssey pc680. After 4 years it will not hold a charge. Car was just finished and the battery sat most of the time.

Looking for a battery size that will fit without removing the body, size 34 looks like it may work, the FFMETAL site says to use the optima 9002-02 red top battery.

Anyone have experience with this or a NON odyssey regular battery, such as a group 34 size. Without taking the body off the car.