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Fiat 500 12V Automotive Battery Replacement Guide
How to change a dead 12 volt car battery in the engine bay of a 2008 to 2015 Fiat 500 with photo illustrated steps.

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2015 Fiat 500 12V Battery
Hold Down Clamp Bolt
Loosen Counterclockwise
This automotive maintenance tutorial was specifically written to assist owners of the "new" Type 312 (2008, 2009, 2010, 2011, 2012, 2013, 2014 and 2015) Fiat 500 hatchback supermini car in changing a dead 12 volt car battery in the engine bay.

Owners of other Fiat, Alfa Romeo, Chrysler, Dodge, Jeep and RAM vehicles such as the 4C, Giulia, 200, 300, Town & Country, Challenger, Charger, Dart, Durango, Journey, Grand Caravan, Compass, Grand Cherokee, Wrangler, Renegade, Cherokee, Patriot, 1500, C/V Tradesman and ProMaster may also find these DIY instructions to be helpful.

The OEM battery is a "Group Size" H5 or 47. A few compatible replacement batteries with their part numbers are as follows: ACDelco 47AGM, Mopar BB0H5500AA, EverStart MAXX-H5 (Walmart), AutoCraft Gold 47H5 and AutoCraft Platinum H5-AGM.

The tools needed to complete this procedure include a 13mm socket, a 6" or 9" extension bar, a 3/8" drive ratchet, a 10mm socket and a 1/4" drive ratchet.

Loosen "-" Terminal
Pull Off Negative Terminal
Cover & Tuck Away
The first two steps are to open the hood and then move to the right (driver side) of the engine bay.

Loosen the single bolt holding the battery hold down bar in place by turning it counterclockwise with the 13mm socket attached to an extension bar and a 3/8" drive ratcheting wrench.

You may not need to entirely remove the 13mm bolt in order to lift out the old battery.

Then loosen the nut on the negative terminal by turning it counterclockwise with the 10mm socket and 1/4" drive ratcheting wrench.

Then carefully pull off the negative terminal, wrap it in a small towel and tuck it away on the side of the battery to help prevent accidental contact.

Pull Off Red Plastic Cover
Loosen 10mm "+" Nut
Pull Off Positive Terminal
Gently pull off the red plastic cover on the positive terminal and set it aside in a safe place.

Loosen the 10mm nut on the positive terminal a few turns in the counterclockwise direction.

Tuck Away "+" Terminal
Lift Out Old 12V Battery
Old Battery Removed
Carefully pull the positive terminal off the "+" battery post and tuck it away on the left side of the battery to help prevent accidental contact.

Raise the handle on the top of the battery and lift it out of the engine bay. Gently rest it on the ground.

Try to avoid dropping or tipping over the old battery to prevent from having battery acid leak out.

Foam Heat Shield Removed
Johnson Controls Battery
OEM Part # 56029742AA
Remove the foam heat shield from the OEM battery.

The OEM 12V battery is a Johnson Controls part number 56029742AA.

Two compatible batteries on Amazon are the ACDelco 47AGM and the Mopar BB0H5500AA.


Clean Off Battery Tray
Replace Heat Shield
Lower In New H5 Battery
Clean off any debris from the plastic battery tray so that the new battery will rest evenly on it.

Slip the foam heat shield over the new battery.

Carefully lower the new 12V battery in to the engine bay with the positive post on the left side and the negative post on the right (driver side).

If you've had an issue with corrosion (white or blue powder) building up on the terminals or battery posts, consider installing some felt anti-corrosion washers over the battery posts.

Push On Positive Terminal
Tighten 10mm Clockwise
Replace Red Plastic Cover
First push the positive terminal on to the "+" battery post.

Tighten the 10mm terminal nut in the clockwise direction until it is snug.

Try to avoid over tightening the terminal to prevent from damaging the battery post.

Push the red plastic cover over the positive terminal.

"+" Terminal Cover Secured
Push On Negative Terminal
Tighten 10mm Clockwise
Then push the negative terminal on to the "-" battery post.

Tighten the 10mm terminal nut in the clockwise direction until it is snug.

Terminals Secured To Posts
Tighten 13mm Clockwise
12V Battery Replaced
Tighten the 13mm battery hold down bar bolt in the clockwise direction until it is snug.

Double check that the new battery can not be moved, wiggled or slid around. If the battery can be moved, tighten the 13mm bolt an extra turn or two.

Test the new 12 volt battery by starting the engine and turning on the headlights.

Be sure to adjust the time on the clock and program your favorite radio station presets before driving.

For more, check out my other 2008-2015 Fiat 500 DIY Repair & Maintenance Guides.

If you found this guide to be helpful, please consider making a small donation by clicking on the "Donate" button located to the right of this paragraph. Thank you!
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