🔧 Murano - 12V Battery Replacement

Replacing the 12V battery restores reliable starting power and prevents random electrical issues (slow crank, warning lights, no-start). On your Murano, the battery sits in the engine bay and is held down with a simple bracket.

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

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⚠️ Safety & Precautions

• ⚠️ Turn ignition fully OFF, key away from the vehicle, and wait 2 minutes before touching battery cables.
• ⚠️ Remove the negative (-) cable first and install it last to reduce short-circuit risk.
• ⚠️ Do not let a wrench touch the battery positive terminal and metal body at the same time.
• ⚠️ Batteries can vent explosive gas—no smoking/sparks; wear eye protection and gloves.
• ⚠️ Battery disconnect is required for this job.

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🔧 Required Tools

You'll need the following tools for this repair:

• 10mm socket
• 10mm combination wrench
• Ratchet (3/8")
• 3" extension (3/8")
• Torque wrench (in-lb or Nm)
• Battery terminal brush (specialty)
• Protective gloves
• Safety glasses

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• 12V battery (Group 35, 550+ CCA) - Qty: 1
• Battery terminal anti-corrosion washers - Qty: 2
• Battery terminal protectant spray - Qty: 1
• Dielectric grease - Qty: 1

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📋 Before You Begin

• 🅿️ Park on level ground, shift to Park, and set the parking brake.
• 🔑 Turn everything off (lights, HVAC, radio) and open the hood.
• 🪟 If you want to avoid window reset hassles, lower the driver window before disconnecting.
• 🧠 A “terminal brush” cleans corrosion from clamps/posts.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Locate the battery and identify terminals

• Open the hood and find the battery at the front of the engine bay.
• Identify negative (-) (usually black cable) and positive (+) (usually red cover).

Step 2: Disconnect the negative (-) battery cable

• Use a 10mm socket with ratchet (3/8") to loosen the negative terminal nut.
• Twist and lift the clamp straight up off the battery post.
• Tuck the negative cable aside so it cannot spring back to the post.
• Negative off first prevents accidental shorts.

Step 3: Disconnect the positive (+) battery cable

• Flip up or remove the red protective cover on the positive terminal (if equipped).
• Use a 10mm socket to loosen the positive terminal nut and lift the clamp off.
• Move the positive cable aside carefully so it can’t touch metal.

Step 4: Remove the battery hold-down bracket

• Use a 10mm socket, ratchet (3/8"), and 3" extension (3/8") to remove the hold-down nuts/bolts.
• Lift off the hold-down bracket/J-hooks and set them aside.

Step 5: Remove the old battery

• Wear protective gloves and safety glasses.
• Lift the battery straight up and out. It’s heavy—use your legs, not your back.

Step 6: Clean the terminals and tray

• Use a battery terminal brush (specialty) to clean the inside of both cable clamps until shiny.
• If there’s corrosion on the tray, wipe it off (dry rag). Make sure the area is dry before installing the new battery.

Step 7: Install the new battery

• Place the new battery into the tray in the same orientation as the old one (terminals in the same positions).
• Install the hold-down bracket and snug it using a 10mm socket.
• Use a torque wrench (in-lb or Nm) and 10mm socket: Torque to 9 Nm (80 in-lb) for the battery hold-down fasteners.
• Battery should not move when pushed by hand.

Step 8: Reconnect the positive (+) cable first

• Install anti-corrosion washers (if included) onto the battery posts.
• Push the positive clamp fully down on the positive post.
• Use a torque wrench (in-lb or Nm) with 10mm socket: Torque to 5 Nm (44 in-lb) for the terminal nut.
• Apply a light film of dielectric grease to exposed metal, then close the red cover.

Step 9: Reconnect the negative (-) cable last

• Push the negative clamp fully down on the negative post.
• Use a torque wrench (in-lb or Nm) with 10mm socket: Torque to 5 Nm (44 in-lb) for the terminal nut.
• Spray battery terminal protectant spray on both terminals after tightening.

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✅ After Repair

• ✅ Start the engine and confirm strong cranking and no flickering lights.
• ✅ Check that the battery is secure and cables can’t be rotated by hand.
• ✅ Reset the clock and radio presets if they were lost.
• ✅ If the auto-up window feature stops working: raise the window fully, keep holding the switch up for 3 seconds, then lower fully and hold 3 seconds, then raise fully again.

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💰 DIY vs Shop Cost

Shop Cost: $220-$420 (parts + labor)

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

You Save: $80-$140 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.

Assumption: standard engine-bay 12V battery (no aftermarket audio/dual-battery setup).