🔧 Renegade - 12V Battery Replacement

Replacing the 12V battery restores reliable starting and prevents random electrical issues. On your Renegade, the battery sits in the engine bay; the job is mostly removing the hold-down, swapping the battery, and reconnecting safely.

Difficulty Level: Beginner | Estimated Time: 0.5-1.0 hours

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⚠️ Safety & Precautions

• ⚠️ Keep keys away from the vehicle while working to prevent modules “waking up.”
• ⚠️ Remove metal jewelry and avoid shorting tools between terminals and body metal.
• ⚠️ Battery acid is corrosive; wear gloves and eye protection.
• ⚠️ Always disconnect negative (-) first and reconnect it last.
• ⚠️ If your Renegade has Stop/Start (ESS), it may require an AGM battery and may benefit from a battery reset.

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🔧 Required Tools

You'll need the following tools for this repair:

• 10mm socket
• 13mm socket
• 3/8" ratchet
• 6" socket extension
• Trim clip tool
• Torque wrench (10–30 ft-lbs range)
• Battery terminal brush
• Battery strap handle
• Protective gloves
• Safety glasses
• Memory saver (12V OBD-II) (specialty)

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• 12V battery (correct fitment for your Renegade) - Qty: 1
• Battery terminal anti-corrosion pads - Qty: 2
• Battery terminal protectant spray - Qty: 1

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📋 Before You Begin

• Park on level ground, turn the ignition OFF, and remove the key/fob from the vehicle.
• Open the hood and let the vehicle sit 5–10 minutes so computers go to sleep.
• If you’re using a memory saver (a device that keeps radio/settings powered during battery swap), connect it now per its instructions.
• Quick check: does your Renegade have a Stop/Start (ESS) button on the dash? If yes, make sure you bought the correct battery type (often AGM).

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Access the battery

• Open the hood and locate the battery in the engine bay.
• If there’s a plastic battery cover or fresh-air duct in the way, remove it using a trim clip tool and/or 10mm socket (fasteners vary by setup).

Step 2: Disconnect the negative terminal (-) first

• Use a 10mm socket to loosen the negative terminal clamp nut.
• Twist and lift the clamp straight up off the battery post.
• Tip: Tuck the cable aside so it can’t spring back.

Step 3: Disconnect the positive terminal (+)

• Flip open the red terminal cover (if equipped).
• Use a 10mm socket to loosen the positive terminal clamp nut.
• Remove the clamp from the battery post and move it safely aside.

Step 4: Remove the battery hold-down

• At the base of the battery, remove the hold-down bolt using a 13mm socket, 3/8" ratchet, and 6" extension.
• Set the hold-down bracket and bolt aside where they won’t get lost.

Step 5: Lift out the old battery

• Use a battery strap handle to lift the battery straight up and out.
• Batteries are heavy; lift with your legs, not your back.

Step 6: Clean and prep the terminals

• Use a battery terminal brush to lightly clean the inside of each cable clamp until shiny.
• Install anti-corrosion pads on the new battery posts (one per post).

Step 7: Install the new battery

• Set the new battery into the tray in the same orientation as the old one (positive and negative in the same positions).
• Reinstall the hold-down bracket and bolt using a 13mm socket.
• Torque to 20 Nm (15 ft-lbs)

Step 8: Reconnect the terminals (positive first)

• Install the positive clamp first and tighten with a 10mm socket.
• Torque to 6 Nm (53 in-lbs)
• Install the negative clamp last and tighten with a 10mm socket.
• Torque to 6 Nm (53 in-lbs)
• Apply a light coat of battery terminal protectant spray after everything is tight.

Step 9: Reinstall any covers/ducts

• Reinstall the battery cover/ducting using the trim clip tool and 10mm socket (as needed).

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✅ After Repair

• Start the engine and confirm the crank is strong and steady.
• Check that the red battery light is OFF on the dash.
• Reset clock and radio presets if you did not use a memory saver.
• If equipped with Stop/Start (ESS): it may take a few drive cycles to relearn and begin working normally.

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💰 DIY vs Shop Cost

Shop Cost: $220-$450 (parts + labor)

DIY Cost: $140-$280 (parts only)

You Save: $80-$170 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.5-1.0 hours.

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🎯 Ready to get started?

Before I tailor the exact battery type and any reset steps, answer these (2) quick questions: (1) Does your Renegade have the Stop/Start (ESS) feature? (2) Are you replacing the battery with the same type as the one currently installed (AGM vs standard lead-acid)?

HowToo makes it easy: same-day/2-day shipping on every part, plus all the tools and specialty tools you need! Check out the parts and tools sections below to add everything to your cart.