🔧 Edge - 12V Battery Replacement

On your Edge, the 12V battery sits under the cowl area at the back of the engine bay, so you’ll remove a few plastic covers to access it. The job is mostly careful disassembly, then swapping the battery and resetting the Battery Monitoring System (BMS) so charging works correctly.

Difficulty Level: Intermediate | Estimated Time: 0.8-1.5 hours

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⚠️ Safety & Precautions

• ⚠️ Keep the key far away and ignition OFF before touching battery cables.
• ⚠️ Disconnect the negative (-) terminal first and reconnect it last to reduce short-circuit risk.
• ⚠️ Do not let a tool touch both the battery post and metal body parts at the same time.
• ⚠️ Battery acid is corrosive; wear gloves and safety glasses.
• ⚠️ If your Edge has auto up/down windows, you may need to relearn them after power loss.
• ⚠️ Battery disconnect is required for this repair.

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🔧 Required Tools

You'll need the following tools for this repair:

• 10mm socket
• 13mm socket
• 1/4" ratchet
• 3/8" ratchet
• 6" socket extension
• Trim clip removal tool
• Flat-blade screwdriver
• Torque wrench (in-lb)
• Torque wrench (ft-lb)
• Battery terminal cleaning brush
• Shop rags
• Nitrile gloves
• Safety glasses
• 12V memory saver (specialty)

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• 12V battery (Group H6/48 size, correct terminals) - Qty: 1
• Battery terminal anti-corrosion washers or spray - Qty: 1
• Dielectric grease - Qty: 1

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📋 Before You Begin

• Park on level ground, shift to P, and set the parking brake.
• Open the hood and keep it supported securely.
• If you’re using a 12V memory saver (a device that keeps settings alive during battery removal), connect it now per its instructions.
• Make sure all lights/accessories are OFF and the ignition is OFF.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Access the battery under the cowl

• Remove the rubber weatherstrip at the rear of the engine bay by pulling it up by hand.
• Use a trim clip removal tool to pop up any plastic push-clips holding the upper cowl cover(s).
• Use a flat-blade screwdriver to gently release any locking tabs, then lift the plastic cowl cover(s) out of the way.
• Go slow—plastic clips break easily.

Step 2: Disconnect the negative (-) battery terminal

• Locate the negative (-) cable (usually black, marked “-”).
• Use a 10mm socket to loosen the terminal pinch bolt.
• Wiggle and lift the terminal off the battery post, then tuck it aside so it cannot spring back.
• Torque to 7 Nm (62 in-lb) when reinstalling.
• If it’s stuck, twist—don’t pry hard.

Step 3: Disconnect the positive (+) battery terminal

• Flip open/remove the positive terminal cover (if equipped).
• Use a 10mm socket to loosen the positive terminal pinch bolt.
• Remove the terminal from the battery post and position it safely aside.
• Torque to 7 Nm (62 in-lb) when reinstalling.

Step 4: Remove the battery hold-down

• At the base of the battery, remove the hold-down bolt using a 13mm socket and ratchet.
• Lift out the hold-down bracket/wedge and set it aside.
• Torque to 10 Nm (89 in-lb) when reinstalling.

Step 5: Remove the old battery

• Lift the battery straight up and out. Batteries are heavy—use good lifting posture.
• Set the old battery on the ground upright.

Step 6: Clean the terminals and prep for install

• Use a battery terminal cleaning brush to clean the inside of both cable terminals.
• Wipe with shop rags.
• Install anti-corrosion washers/spray, then apply a thin layer of dielectric grease to help prevent corrosion.
• Clean metal-to-metal contact is key.

Step 7: Install the new battery

• Place the new battery into the tray in the same orientation as the old one (terminals matching the cables).
• Reinstall the hold-down bracket and bolt using a 13mm socket.
• Torque to 10 Nm (89 in-lb).

Step 8: Reconnect the battery cables (positive first)

• Install the positive (+) terminal first. Use a 10mm socket to tighten.
• Torque to 7 Nm (62 in-lb).
• Install the negative (-) terminal last. Use a 10mm socket to tighten.
• Torque to 7 Nm (62 in-lb).

Step 9: Reinstall the cowl cover(s) and weatherstrip

• Reposition the cowl cover(s) and press them into place.
• Reinstall push-clips by pressing them in by hand (use the trim clip removal tool only if needed to align).
• Press the rubber weatherstrip back into place along the rear edge.

Step 10: Reset the Battery Monitoring System (BMS)

• Turn ignition to ON (engine OFF).
• Within 10 seconds, flash the high beams 5 times (pull the stalk toward you 5 times).
• Then press and release the brake pedal 3 times.
• Watch the battery/charging indicator on the cluster; it should flash to confirm the reset (if equipped).
• This helps charging strategy match the new battery.

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✅ After Repair

• Start the engine and confirm normal cranking and no warning messages.
• Check that headlights, wipers, and HVAC blower all work normally.
• If power windows act weird, relearn them: fully down, hold 2 seconds; fully up, hold 2 seconds.
• Verify radio clock/settings; restore presets if needed.
• Recheck battery terminals after a short drive—make sure they’re fully seated and not loose.

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💰 DIY vs Shop Cost

Shop Cost: $250-$450 (parts + labor)

DIY Cost: $180-$320 (parts only)

You Save: $70-$130 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.8-1.2 hours.

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🎯 Ready to get started?

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.