🔧 Altima - Rear Window Regulator Replacement

Replacing a rear window regulator means removing the rear door panel, securing the glass, removing the failed regulator and motor assembly, then installing the new assembly inside the rear door. The most important part is supporting the glass so it cannot fall while the regulator is disconnected.

Difficulty Level: Intermediate | Estimated Time: 1.5-2.5 hours per rear door

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⚠️ Safety & Precautions

• ⚠️ Disconnect the negative battery cable before unplugging door wiring connectors.
• ⚠️ Support the rear door glass with painter’s tape before removing regulator or glass bolts.
• ⚠️ Wear gloves because the inside of the door has sharp metal edges.
• ⚠️ Do not put your fingers in the regulator cable path while testing the window.
• ⚠️ Do not slam the door while the glass or regulator is loose.

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🔧 Required Tools

You'll need the following tools for this repair:

• 10mm socket
• Ratchet
• 6-inch extension
• Phillips #2 screwdriver
• Plastic trim removal tool set
• Small flat-blade screwdriver
• Needle-nose pliers
• Painter’s tape
• Torque wrench inch-pound range
• Work gloves
• Safety glasses

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Rear door window regulator with motor - Qty: 1 per door
• Rear door trim panel clips - Qty: As needed
• Butyl sealing tape - Qty: 1 roll if moisture barrier sealer is damaged

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📋 Before You Begin

• Park your Altima on level ground and set the parking brake.
• Lower the affected rear window halfway if it still works.
• If the window does not move, you can still remove the regulator, but you will need to carefully lift and tape the glass by hand.
• Turn the ignition off and remove the key fob from the vehicle.
• Use a 10mm socket to disconnect the negative battery cable.
• A regulator is the mechanism inside the door that moves the glass up and down.
• A plastic trim tool is a non-metal pry tool used to pop panels loose without scratching them.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Remove the Small Trim Covers

• Use a small flat-blade screwdriver wrapped with painter’s tape to lift the screw cover behind the inside rear door handle.
• Use the same small flat-blade screwdriver to lift the screw cover inside the armrest pull pocket.
• Wrap the screwdriver tip first.

Step 2: Remove the Door Panel Screws

• Use a Phillips #2 screwdriver to remove the screw behind the inside rear door handle.
• Use a Phillips #2 screwdriver to remove the screw in the armrest pull pocket.
• Keep the screws in a safe place.

Step 3: Release the Rear Door Panel

• Use a plastic trim removal tool at the lower edge of the rear door panel.
• Pry outward gently until the first plastic clip pops loose.
• Work around the sides and bottom of the panel with the plastic trim removal tool.
• Lift the door panel straight upward to unhook it from the top window ledge.
• Pull slowly to avoid broken clips.

Step 4: Disconnect Door Panel Wiring

• Hold the door panel close to the door so the wires are not stretched.
• Use a small flat-blade screwdriver to press the lock tab on the rear window switch connector.
• Unplug the connector by pulling on the connector body, not the wires.
• If equipped with a courtesy light connector, use the small flat-blade screwdriver to release and unplug it.
• Use needle-nose pliers to unclip the interior handle cable if it prevents panel removal.

Step 5: Remove the Moisture Barrier

• Use your hands and a plastic trim removal tool to carefully peel back the plastic moisture barrier.
• The moisture barrier is the plastic sheet behind the door panel that keeps water away from the interior trim.
• Do not tear it. It must be reinstalled to prevent water leaks.

Step 6: Secure the Rear Door Glass

• Use painter’s tape to tape the glass to the outside top of the door frame.
• Apply several long strips from the outside glass surface over the top of the door frame.
• If the glass is stuck down, wear work gloves and carefully lift the glass by hand, then tape it fully closed.
• Important: Do not remove regulator bolts until the glass is supported.

Step 7: Remove the Glass Mounting Bolts

• Look through the door access holes to find the bolts that clamp the glass to the regulator.
• Use a 10mm socket, ratchet, and 6-inch extension to remove the glass mounting bolts.
• If the bolts do not line up with the access holes, reconnect the window switch temporarily and move the regulator slightly if it still operates.
• After moving the regulator, use a 10mm socket to disconnect the negative battery cable again before continuing.

Step 8: Unplug the Window Motor

• Use a small flat-blade screwdriver to press the release tab on the window motor electrical connector.
• Pull the connector straight off by the connector body.

Step 9: Remove the Old Regulator

• Use a 10mm socket, ratchet, and 6-inch extension to remove the window regulator mounting bolts.
• Support the regulator with one hand as you remove the last bolt.
• Guide the regulator and motor assembly out through the large opening in the inner door.

Step 10: Install the New Regulator

• Feed the new rear window regulator with motor into the door opening.
• Use a 10mm socket and ratchet to start all regulator mounting bolts by hand.
• Use a torque wrench with a 10mm socket to tighten the regulator mounting bolts.
• Torque to 8 Nm (71 in-lbs)

Step 11: Attach the Glass to the New Regulator

• Carefully loosen the painter’s tape enough to lower the glass into the regulator clamps.
• Use a 10mm socket and ratchet to install the glass mounting bolts.
• Use a torque wrench with a 10mm socket to tighten the glass mounting bolts.
• Torque to 6 Nm (53 in-lbs)

Step 12: Test the Window Before Reassembly

• Plug the window motor connector back in by hand until it clicks.
• Reconnect the rear window switch connector by hand.
• Use a 10mm socket to reconnect the negative battery cable.
• Turn the ignition on.
• Use the rear window switch to move the glass slowly down and up.
• Watch the glass closely. It should move smoothly without tilting or binding.
• If the glass binds, stop and use a 10mm socket to loosen the glass bolts, realign the glass, then retighten.
• Torque to 6 Nm (53 in-lbs)

Step 13: Reinstall the Moisture Barrier

• Use your hands to press the moisture barrier back onto the door.
• If the original sticky sealer no longer holds, use butyl sealing tape around the edge.
• Make sure wiring is routed through the correct openings and not pinched.

Step 14: Reinstall the Rear Door Panel

• Reconnect the interior handle cable with needle-nose pliers if removed.
• Reconnect the rear window switch connector by hand.
• Reconnect the courtesy light connector by hand if equipped.
• Hook the top of the door panel over the window ledge.
• Align the plastic clips with the holes in the door.
• Press around the door panel by hand until all clips snap into place.

Step 15: Reinstall Screws and Covers

• Use a Phillips #2 screwdriver to reinstall the screw in the armrest pull pocket.
• Use a Phillips #2 screwdriver to reinstall the screw behind the inside rear door handle.
• Press the small trim covers back into place by hand.
• Snug is enough on plastic.

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✅ After Repair

• ✅ Run the repaired rear window fully down and fully up at least 3 times.
• ✅ Test the rear switch and the driver master switch.
• ✅ Listen for clicking, grinding, or cable noise.
• ✅ Check that the glass seals evenly at the top of the door.
• ✅ Make sure the door lock, inside handle, and speaker still work.
• ✅ If the window auto function acts odd, hold the switch up for 5 seconds after the glass reaches fully closed.

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💰 DIY vs Shop Cost

Shop Cost: $300-$550 per rear door (parts + labor)

DIY Cost: $80-$220 per rear door (parts only)

You Save: $180-$330 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1.0-1.5 hours per rear door.

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