🔧 Murano - 12V Battery Replacement

You’ll remove the old 12V battery from the engine bay and install a new one with the same size and terminal layout. Doing it correctly prevents damage to sensitive electronics and avoids a no-start from poor terminal contact.

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

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⚠️ Safety & Precautions

• ⚠️ Turn the ignition OFF and keep the key fob at least 10 feet away from your Murano before you start.
• ⚠️ Always disconnect the negative (-) terminal first and reconnect it last to reduce short-circuit risk.
• ⚠️ Don’t let a wrench touch the positive terminal and any metal body part at the same time.
• ⚠️ Batteries can vent explosive gas—no sparks, flames, or smoking nearby.
• ⚠️ If corrosion is heavy, wear gloves and eye protection; battery acid can burn skin/eyes.

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🔧 Required Tools

You'll need the following tools for this repair:

• 10mm socket
• 3/8" ratchet
• 6" extension for 3/8" ratchet
• 10mm combination wrench
• Battery terminal puller (specialty)
• Battery post/terminal cleaning brush
• Torque wrench (in-lb or low Nm range)
• Trim clip tool
• Nitrile gloves
• Safety glasses

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• 12V battery (fitment-matched for your Murano) - 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, shift to P, and set the parking brake.
• Open the hood and locate the 12V battery in the engine bay.
• If you want to preserve radio presets, you can use a memory saver (a small device that powers the car through the OBD port while the battery is removed).
• Make sure all lights are OFF and all doors are closed so the car doesn’t “wake up” while you work.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Access and inspect the battery

• Put on safety glasses and nitrile gloves.
• If a cover or duct blocks access, remove any push-clips using a trim clip tool.
• Look at the terminals: negative (-) is usually black/marked “-”, positive (+) is usually red/marked “+”.

Step 2: Disconnect the negative (-) terminal

• Use a 10mm socket with a 3/8" ratchet to loosen the negative terminal clamp nut.
• Wiggle the clamp upward off the battery post. If it’s stuck, use a battery terminal puller (specialty) (it separates a tight clamp from the post without damage).
• Tuck the negative cable to the side so it can’t spring back and touch the battery post.
• Torque on reassembly: Torque to 5.4 Nm (48 in-lb)

Step 3: Disconnect the positive (+) terminal

• Use a 10mm socket with a 3/8" ratchet to loosen the positive terminal clamp nut.
• Lift the clamp straight up off the post and position it aside where it can’t touch metal.
• Torque on reassembly: Torque to 5.4 Nm (48 in-lb)

Step 4: Remove the battery hold-down

• Use a 10mm socket, 3/8" ratchet, and 6" extension to remove the hold-down nuts/bolts.
• Lift off the hold-down bracket and set it aside.
• Torque on reassembly: Torque to 5.4 Nm (48 in-lb)

Step 5: Remove the old battery

• Lift the battery straight up and out using safe posture (bend knees, keep back straight).
• Keep it level; acid can leak if tipped.

Step 6: Clean the tray and terminals

• Use a battery post/terminal cleaning brush to clean the inside of the cable clamps and the posts (if reusing cable ends).
• If corrosion is heavy, clean until the metal looks bright and smooth.

Step 7: Install the new battery and secure it

• Set the new battery into the tray in the same orientation as the old one.
• Reinstall the hold-down bracket using a 10mm socket, 3/8" ratchet, and 6" extension.
• Torque: Torque to 5.4 Nm (48 in-lb)

Step 8: Reconnect the positive (+) terminal first

• Install the anti-corrosion pad on the positive post.
• Push the positive clamp fully down onto the post.
• Tighten the clamp nut using a 10mm socket and torque wrench.
• Torque: Torque to 5.4 Nm (48 in-lb)
• Apply battery terminal protectant spray per the can directions.

Step 9: Reconnect the negative (-) terminal last

• Install the anti-corrosion pad on the negative post.
• Push the negative clamp fully down onto the post.
• Tighten the clamp nut using a 10mm socket and torque wrench.
• Torque: Torque to 5.4 Nm (48 in-lb)
• Apply battery terminal protectant spray per the can directions.

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✅ After Repair

• Start your Murano and confirm it cranks strongly and idles normally.
• Check that headlights, horn, and interior lights work.
• If the power windows lost “auto” function: close each window, then hold the switch in the “up/close” position for a few seconds to re-learn.
• Reset the clock and radio presets if needed.
• Dispose of the old battery at a parts store/recycling center (most take it back).

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💰 DIY vs Shop Cost

Shop Cost: ₹8,000-₹16,000 (parts + labor)

DIY Cost: ₹6,500-₹14,000 (parts only)

You Save: ₹1,500-₹4,000 by doing it yourself!

Shop labor rates vary but typically run ₹1,000-₹2,500/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.