🔧 Explorer - Battery Replacement

You’ll be replacing the 12V battery under the hood on your Explorer. This restores reliable starting and protects the electronics from low-voltage problems.

Difficulty Level: Beginner | Estimated Time: 45-75 minutes

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⚠️ Safety & Precautions

• 🛑 Always work with the engine OFF, ignition OFF, and key fob away from the vehicle.
• 🧤 Wear safety glasses and gloves; batteries contain acid and can spark.
• ⚡ Never let tools touch both battery posts at the same time; that can cause a short (big spark).
• ⚡ Always disconnect the negative (-) cable first and reconnect it last to reduce short-circuit risk.
• 🔥 Keep metal jewelry (rings, watches, bracelets) away from the battery area.
• 🧯 Have good ventilation; do not smoke or use open flames near the battery.
• 🔋 Your Explorer has a Battery Monitoring System (BMS); after replacement it should be reset with a scan tool so charging works correctly.

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🔧 Required Tools

You'll need the following tools for this repair:

• 🧰 10mm socket
• 🧰 13mm socket
• 🧰 1/4" drive ratchet
• 🧰 3/8" drive ratchet
• 🧰 6" socket extension
• 🧰 Small flathead screwdriver
• 🧰 Plastic trim tool
• 🧰 Battery terminal brush
• 🧰 12V memory saver tool (OBD or power outlet type) (specialty)
• 🧰 Battery carrier strap or handle (specialty)
• 🧰 Torque wrench (inch‑pound, 30–120 in‑lb range) (specialty)
• 🧰 Digital multimeter (basic voltage tester)
• 🧰 Shop towels or rags
• 🧰 Baking soda and water mix container
• 🧰 Safety glasses
• 🧰 Mechanic gloves

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• 🔩 12V AGM battery (correct group size for Explorer Platinum) - Qty: 1
• 🔩 Battery terminal protector spray - Qty: 1
• 🔩 Dielectric grease - Qty: 1
• 🔩 Battery hold‑down bolt and clamp kit - Qty: 1 (optional, if yours is rusty or damaged)
• 🔩 Battery anti‑corrosion felt washers - Qty: 2 (optional but recommended)

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📋 Before You Begin

• 🚗 Park the Explorer on level ground, shift to Park, and set the parking brake.
• 🔑 Turn ignition OFF and open the hood with the hood prop rod securely in place.
• 💾 If you have a memory saver tool (keeps radio presets and window settings), connect it now following its instructions.
• 📱 Keep metal tools away from the battery until you’re ready to loosen the clamps.
• 🧪 Mix a little baking soda and water in a small container for neutralizing any corrosion on the battery tray.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Locate and uncover the battery

• Open the hood and look near the front driver side; you’ll see the battery with a plastic cover on top.
• Use the plastic trim tool or your fingers to release the clips and lift off the plastic battery cover.
• Set the cover aside somewhere clean.

Step 2: Identify positive and negative terminals

• The positive (+) terminal usually has a red cover and more cables.
• The negative (-) terminal is usually black and goes to the body or engine metal.
• Double‑check signs before loosening anything.

Step 3: Disconnect the negative (-) cable first

• Use the 10mm socket and 1/4" ratchet to loosen the clamp bolt on the negative (-) battery terminal.
• You only need to loosen the bolt a few turns; do not remove it all the way.
• Gently twist the clamp side‑to‑side and lift it off the battery post.
• Move the cable away from the battery and tuck it to the side so it cannot spring back to the post. You can wrap it in a rag for extra safety.

Step 4: Disconnect the positive (+) cable

• Flip open or remove the red protective cap on the positive (+) terminal using the small flathead screwdriver if needed.
• Use the 10mm socket and 1/4" ratchet to loosen the positive clamp bolt a few turns.
• Twist the clamp gently and lift it off the battery post.
• Move the positive cable away from the battery so it cannot touch either post.

Step 5: Remove the battery hold‑down

• At the base of the battery, you’ll see a metal or plastic clamp holding the battery to the tray.
• Use the 13mm socket, 3/8" ratchet, and extension to remove the hold‑down bolt.
• Lift off the hold‑down clamp and set it aside.
• Torque spec for reassembly: 7–9 Nm (62–80 in‑lb)

Step 6: Lift out the old battery

• Batteries are heavy. Use a battery carrier strap if you have one, attaching it to the battery handle or posts as designed.
• Lift the battery straight up and out of the engine bay, being careful not to hit nearby wiring or hoses.
• Set the old battery on the ground in an upright position.
• Use your legs, not your back, when lifting.

Step 7: Clean the battery tray and cables

• Inspect the battery tray for white or green corrosion.
• Dip a towel in the baking soda and water mix and wipe the tray and surrounding area. This neutralizes any acid.
• Use the battery terminal brush to clean the inside of the cable clamps until bare, shiny metal is visible.
• Wipe dry with a clean rag.

Step 8: Place the new battery in position

• Check that the new battery’s positive (+) and negative (-) posts are on the same sides as the old one.
• Use the battery carrier strap to lower the new battery into the tray, keeping it level.
• Make sure it sits flat and fully into the tray locating features.
• Install anti‑corrosion felt washers over the posts now if you’re using them.

Step 9: Reinstall the battery hold‑down

• Reposition the hold‑down clamp at the base of the battery.
• Install the hold‑down bolt by hand to avoid cross‑threading.
• Use the 13mm socket, extension, and 3/8" ratchet to snug the bolt.
• Then tighten with the torque wrench and 13mm socket to 7–9 Nm (62–80 in‑lb).
• Battery should not slide but don’t overtighten.

Step 10: Connect the positive (+) cable

• Lightly smear a thin layer of dielectric grease on the positive post (optional but helpful).
• Place the positive (+) clamp fully down on the battery post.
• Use the 10mm socket and 1/4" ratchet to tighten the clamp bolt.
• Finish by tightening with the torque wrench and 10mm socket to 5–7 Nm (44–62 in‑lb).
• Close the red protective cap over the positive terminal.

Step 11: Connect the negative (-) cable

• Lightly smear a thin layer of dielectric grease on the negative post if desired.
• Place the negative (-) clamp fully down on the battery post.
• Use the 10mm socket and 1/4" ratchet to tighten the clamp bolt.
• Finish by tightening with the torque wrench and 10mm socket to 5–7 Nm (44–62 in‑lb).
• Make sure both clamps are fully seated and do not rotate by hand.

Step 12: Reinstall the battery cover and check voltage

• Snap the plastic battery cover back into place over the battery.
• Use the digital multimeter to check battery voltage at the posts; a fully charged new AGM battery should read around 12.6–12.8V with engine off.
• If it’s much lower, charge before heavy use.

Step 13: Reset the Battery Monitoring System (BMS)

• Ford recommends a BMS reset whenever the battery is replaced.
• The proper way is with a scan tool that supports Ford BMS reset.
• Use a scan tool (specialty) capable of Ford service functions, then follow its on‑screen path, typically like:
  • Menu > Ford > Explorer > Service Functions > Battery Monitoring System Reset
• If you don’t have this, the vehicle will still run, but charging may not be perfectly optimized. You can have a local shop or mobile technician do the BMS reset quickly.

Step 14: Reinitialize auto-up windows (if needed)

• If the one‑touch up/down on the windows stopped working:
  • Turn the ignition ON (engine can be off).
  • Fully close one window using the switch and hold the switch up for 2–3 seconds.
  • Then fully open the same window and hold the switch down for 2–3 seconds.
  • Repeat for each window that lost one‑touch function.

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✅ After Repair

• 🔁 Start the engine and let it idle for a few minutes; check that it cranks strongly and idles smoothly.
• 💡 Check all exterior lights, interior lights, and the infotainment system.
• 📻 Re‑enter radio presets, clock time, and any customized settings if the memory saver was not used.
• 🚗 Take a short test drive with some mixed speeds to let the charging system adapt.
• 📟 If any warning lights appear (battery, charging, etc.), have the system scanned; often this is related to BMS not being reset.

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💰 DIY vs Shop Cost

Shop Cost: $250–$400 (parts + labor)

DIY Cost: $150–$250 (parts only)

You Save: $100–$150 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?

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 above to add everything to your cart.