What kind of battery for 2004 grand marquis?

A 2004 Ford Grand Marquis requires a Group 65 battery. However, you might find slightly different group sizes that are cross-referenced as compatible depending on the specific trim level and available space in your vehicle's battery tray. Always double-check the sticker on your battery or your owner's manual for the exact recommended group size. When buying a replacement, you can use the group size to find a suitable battery at most auto parts stores.