1Open the hood and find the battery
The 12V battery is under the hood. Remove any plastic cover over it.
FREE REPAIR GUIDEJeep Wrangler
Jeep Wrangler
Battery replacement.
A little guidance for your next fix. Follow five steps to replace the main 12V battery in your 2018–2024 Wrangler.
DIFFICULTYEasy
ESTIMATED TIME~30 min
TOOLS10mm / 13mmSocket set + extension
POTENTIAL SAVINGS$60–120Labour estimate · varies
Know what you’re replacing.
A slow crank, clicking, or electrical glitches on start-up usually mean your Jeep Wrangler needs a new battery. Most of these swaps take about 30 minutes. If your vehicle has Auto Start-Stop, it needs an AGM battery. Wranglers with Engine Stop-Start (ESS) have a second, smaller auxiliary battery under the main one. This guide covers the main battery; the aux battery is a separate job.
Main battery only. Wranglers with Engine Stop-Start (ESS) have an auxiliary battery too. Its replacement is a separate job. Check the procedure for your exact engine and trim before starting.
What you’ll need.
Battery for 2018–2024 Jeep WranglerConfirm group size and AGM vs flooded for your engine ~$150–300
View on Amazon →
Battery terminal brushCleans corrosion · ~$6
View on Amazon →Socket set with extensionReaches hold-down bolts · ~$25
View on Amazon →As an Amazon Associate, RepairAI may earn from qualifying purchases. Confirm fitment for your exact year, engine and trim before buying.
A little preparation first.
- Match the group size and type on your old battery's label, or look it up by VIN at a parts store.
- Engine off, key or smart key away from the vehicle, glasses and gloves on.
- Note radio presets; some settings may reset.
One step at a time.
2Disconnect the negative (–) terminal first
Loosen the black terminal and move the cable away from the post. If there's a sensor on the negative clamp, disconnect at the clamp, not the sensor plug.
3Disconnect positive and remove the hold-down
Remove the red terminal, then unbolt the hold-down with a socket and extension.
4Lift out the old battery
Lift straight up with both hands — expect 40–55 lb — and keep it upright.
5Install the new battery
Seat it the same way, refit the hold-down, connect positive first, negative last, and tighten both clamps.
Log in 
Troubleshooting
Warning messages after the swapMany Ford and Ram/Jeep vehicles use a battery monitoring system that relearns after the vehicle sits locked for several hours; a shop scan tool can reset it right away.Auto Start-Stop doesn't workNormal until the system relearns, or the battery isn't the right AGM type.Still slow to crankHave the alternator and cables checked — record the start-up sound for a diagnosis.
FAQ
Which battery does my Jeep Wrangler take?It depends on engine and options. Check the old label or a parts-store VIN lookup.What do I do with the old battery?Return it to the store for the $10–20 core refund.
General guidance only. Procedures vary by year, engine and trim; if unsure, consult a qualified mechanic or your owner’s manual.