🔧 4Runner - Battery Replacement

Replacing the 12V battery on your 4Runner is a straightforward under-hood job. You’ll remove the old battery, clean the terminals/area, and install the new one in the same position so the truck starts and charges properly.

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

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⚠️ Safety & Precautions

• 🛑 Turn the ignition fully OFF and keep the key fob away from the vehicle while you work.
• 🧤 Batteries can vent explosive gas—no smoking/sparks; wear safety glasses and gloves.
• ⚡ Always disconnect the negative (-) cable first, then the positive (+); reconnect in the reverse order.
• 🧪 Avoid tipping the battery; acid can leak and burn skin/paint.

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🔧 Required Tools

You'll need the following tools for this repair:

• 10mm combination wrench
• 10mm socket
• 1/4" ratchet
• 6" extension for 1/4" ratchet
• Battery terminal cleaning brush (specialty)
• Shop rags
• Nitrile gloves
• Safety glasses
• Inch-pound torque wrench 20-200 in-lb (specialty)

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• 12V battery (Group 24F, top-post) - Qty: 1
• Battery terminal protectant spray - Qty: 1
• Anti-corrosion battery terminal washers - Qty: 1

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📋 Before You Begin

• Park on level ground, shift to Park, and set the parking brake.
• Open the hood and locate the battery on the passenger side of the engine bay.
• Note: disconnecting the battery may reset your clock and radio presets.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Make sure everything is powered down

• Confirm the ignition is OFF and all lights/accessories are OFF.
• Use 10mm combination wrench to confirm you can access both battery terminals safely.

Step 2: Disconnect the negative (-) battery cable

• Use a 10mm combination wrench to loosen the nut on the negative (-) terminal clamp.
• Lift the clamp straight up off the battery post and tuck it aside so it cannot spring back.
• Negative off first prevents accidental shorting.
• Torque to 5.4 Nm (48 in-lb) when reinstalling the terminal clamp nut.

Step 3: Disconnect the positive (+) battery cable

• Use a 10mm combination wrench to loosen the nut on the positive (+) terminal clamp.
• Remove the clamp from the post and position it so it cannot touch metal.
• Torque to 5.4 Nm (48 in-lb) when reinstalling the terminal clamp nut.

Step 4: Remove the battery hold-down bracket

• Use a 10mm socket, 1/4" ratchet, and 6" extension for 1/4" ratchet to remove the two hold-down nuts.
• Lift off the hold-down bar and J-hooks and set them aside in the order removed.
• Reinstall torque can vary by hold-down style; use your inch-pound torque wrench 20-200 in-lb (specialty) and tighten to the factory specification for your hold-down hardware.

Step 5: Remove the old battery

• Grip the battery by the built-in handle (if equipped) and lift it straight up and out.
• Set it on the ground upright (not on its side).

Step 6: Clean the battery tray and terminals

• Use shop rags to wipe dirt and corrosion from the tray area.
• Use a battery terminal cleaning brush (specialty) to clean the inside of both cable clamps until the metal is shiny.
• If using anti-corrosion battery terminal washers, place them on the battery posts before reinstalling the clamps.

Step 7: Install the new battery and secure it

• Place the new battery into the tray in the same orientation as the old one.
• Reinstall the hold-down bracket using the 10mm socket, 1/4" ratchet, and 6" extension for 1/4" ratchet.
• Tighten the hold-down evenly so the battery cannot move.

Step 8: Reconnect the positive (+) cable, then the negative (-) cable

• Install the positive (+) clamp first and tighten using the 10mm combination wrench. Torque to 5.4 Nm (48 in-lb).
• Install the negative (-) clamp second and tighten using the 10mm combination wrench. Torque to 5.4 Nm (48 in-lb).
• Spray battery terminal protectant spray on the connections after tightening.

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✅ After Repair

• Start the engine and confirm it cranks strongly and idles normally.
• Check that the battery warning light is OFF on the dash.
• Reset the clock and re-save radio presets if needed.
• If the driver window auto-up/down stops working: cycle the window fully down, then fully up, holding the switch for a few seconds at the top.

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💰 DIY vs Shop Cost

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

DIY Cost: $160-$320 (parts only)

You Save: $60-$130 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 below to add everything to your cart.