The Pacifica uses a standard 12-volt automotive lead-acid battery. For replacements, the common group size is 58 (58R-compatible) with typical cold-cranking amps around 600–750, depending on climate. Always verify the exact specification on your current battery or in the owner's manual.
Battery type and replacement size
The 2004 Pacifica relies on a conventional 12-volt flooded lead-acid battery. The most commonly required group size is 58, with some listings calling out 58R depending on the terminal arrangement. This size supports the 3.5L V6 engine typically found in early 2004 models. CCA and RC values vary by climate and equipment, but replacements generally fall in the 600–750 CCA range and about 100–120 minutes of reserve capacity.
When replacing, always verify the exact size and specs from the battery label, the owner's manual, or a Chrysler dealer to ensure proper fit and performance.
Shopping considerations
Before you buy a replacement, consider these factors:
- Group size: Look for 58 (58R variants may be listed; ensure fit in the battery tray and terminal layout).
- Battery type: Standard flooded lead-acid is the norm; AGM is available as an aftermarket option but is not typically required for this model year.
- CCA: Choose a battery with adequate cold-cranking amps for your climate; higher CCA helps in very cold conditions.
- RC: A higher reserve capacity can help during long trips or when frequently idling in cold weather.
- Fit and terminals: Confirm the battery’s terminal layout and polarity match your vehicle’s cables.
In short, selecting a Group 58 flooded lead-acid battery with specs meeting or exceeding the OEM values will ensure reliable starting and electrical performance in a 2004 Pacifica.
Installation and verification
Proper installation helps maintain battery life and charging system health. If you’re unsure, have a professional check the alternator and electrical system during replacement.
- Check the current battery label or owner's manual to confirm group size and CCA.
- Choose a replacement that matches or exceeds the original specs and fits the tray.
- Ensure terminal layout and polarity match; disconnect negative cable first, then positive, and reconnect in reverse order after installation.
- Test the charging system after installation to confirm the alternator is charging properly.
With installation completed, test drive and monitor for starting performance and any electrical issues.
Summary
The 2004 Chrysler Pacifica relies on a standard 12-volt lead-acid automotive battery. The common replacement group size is 58 (with 58R variants in some listings), offering roughly 600–750 CCA and 100–120 minutes RC depending on climate and equipment. Always verify with the vehicle’s manual or the existing battery label and ensure proper fit and terminal configuration when replacing.